Vol 167 No 2
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Date submitted2005-07-14
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Date accepted2005-08-30
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Date published2006-02-01
Regularities of spatial location of rich iron ores of Yakovlevskoye deposit
- Authors:
- I. V. Apukhtina
The article analyzes spatial patterns of distribution of rich iron ores of Yakovlevskoye deposit using MICROMINE software package, usually used for making geological 3D-models of ore deposits and estimation of their reserves.
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Date submitted2005-07-14
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Date accepted2005-08-12
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Date published2006-02-01
Application of complex optical method in geological and field purposes on the example of Vinokurovskaya deposit
- Authors:
- I. V. Valiullin
The article analyzes the results of comprehensive studies of physical, chemical and optical properties of oil of Vinokurovskaya deposit, located on the northern side of the South Tatar dome-shaped fold. Terrigenous sediments of the Bobrikovsky horizon of the Vinokurovskaya deposit were selected as the object of study. The studies included taking and dewatering of oil samples, measuring their density, kinematic viscosity, surface tension and optical properties. Standard features, correlation dependences of light absorption coefficient on physical properties, complex physical, chemical and optical characteristics of produced oil were established. Regularities of light absorption coefficient changes in oil and water-oil zones have been studied. A set of quantitative and qualitative optical characteristics was developed and their factor analysis was carried out. The influence of capacitance-fluid-absorbing properties of the reservoir, such as sphericity, permeability, water permeability and effective thickness of the reservoir, on the physical and chemical properties of the produced oil, including the optical properties of complex oil, has been studied.
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Date submitted2005-07-26
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Date accepted2005-08-29
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Date published2006-02-01
Modeling of main non-isothermal pipeline in complicated operating conditions
- Authors:
- A. A. Glushkov
The article presents an algorithm for calculating operating modes (both steady-state and non-steady-state) of non-isothermal oil pipelines in complex conditions. The proposed algorithm is used for pipelines with several pumping stations and for individual pipeline sections (both above-ground and underground). Calculations can be carried out in a given temperature range, which increases their accuracy. In addition, the algorithm takes into account changes in the operating mode, the influence of additional pumps on the main pipeline and heat points located along the pipeline. It also allows to determine the internal heat transfer coefficient. This algorithm can be applied to fluids of any rheological model. It has been tested on real main and industrial pipelines. It is supplied together with a software package.
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Date submitted2005-07-26
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Date accepted2005-08-17
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Date published2006-02-01
Influence of engineering-geological conditions on formation of level of reaction and spectral composition of ground vibrations at strong earthquakes
- Authors:
- N. A. Gromova
As a result of detailed seismic zoning on the basis of analysis of various databases with the help of the American program Seisrick-3 a set of probability maps for the territory of Vladikavkaz was made. The map with a probability of 2% comes closest to the accepted level of seismic hazard for average ground conditions. The southern part of the city is located in the zone with intensity of 8 points, and the northern part -7 points. The obtained data allow us to construct maps of seismic microzonation of the city territory. In the 8-point part of the city it is possible to obtain zones with 7 and 9-point intensity, and in the 7-point zone - zones with 6 and 8-point intensity. These maps are a direct basis for earthquake-resistant construction, and their use will allow to assess the seismic risk of the building and to form the directions of corresponding preventive measures.
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Date submitted2005-07-24
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Date accepted2005-08-29
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Date published2006-02-01
Conducting seismic exploration works on 3-AR profile in the White, Barents and Kara seas
- Authors:
- S. N. Ivanova
Seismic works are planned in connection with oil and gas prospecting in the basins of the White, Barents and Kara Seas. To solve the set geologic tasks, profile seismic works were selected using the CDP (common-depth-point) method. The article provides general information and geological characteristics of the area, as well as optimal parameters and methods of the designed works.
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Date submitted2005-07-09
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Date accepted2005-08-02
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Date published2006-02-01
Gold in jewelry art of masters of pre-Columbian America
- Authors:
- S. V. Komashchenko
The features of gold mining, its primary processing and use in jewelry art on the territory of South and Central America in pre-Columbian times are considered. The development of Indian jewelry became possible after the discovery of rich gold-bearing veins in the Central and Western Cordilleras and placers in the valleys of the Andes. Development of deposits was carried out by means of shaft-wells not more than 1m in diameter. Gold refining was one of the most advanced metallurgical operations used by pre-Columbian jewelers. Tum-baga, an alloy of gold and copper in the ratio of 3:7, was most often used in articles. The technique of gilding gave the articles made of tumbaga or low-grade gold the appearance of objects made of pure gold. Forging, joining parts with the help of gold nails and casting hollow pieces, known as the lost wax technique, were very common in metalworking techniques, which made it possible to produce unique jewelry pieces.
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Date submitted2005-07-03
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Date accepted2005-08-15
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Date published2006-02-01
Alluvial gold of the basin of the river Manya in the Subpolar Urals
- Authors:
- A. A. Konovalov
The purpose of this study is to investigate the characteristics of placer gold and associated minerals in placers in order to predict bedrock types and to determine the distance of gold transition from bedrock. The research was based on materials collected in the Manya River basin located in the Berezovsky District of Tyumen Region. The research methods used are widely used in geology and are sufficiently accurate, which allows solving the set questions.
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Date submitted2005-07-17
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Date accepted2005-08-05
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Date published2006-02-01
Prevention of formation and negative influence of persistent water-in-oil emulsions by sucker rod well pumping units
- Authors:
- A. A. Lutfullin
Water encroachment of well products at late stages of oil field development leads to formation of oil-in-water emulsion. At water cut of 30-80% three-component emulsions are formed, which lead to rod sticking and, eventually, to rod string breakage. Water-in-oil emulsions differ from crude oil in both viscosity and initial shear stress. The increase in viscosity of water-in-oil emulsions when the rods are mechanically actuated occurs approximately in the first third of the lift string, starting at the pump. At further lifting the viscosity of the mixture increases not so intensively, and its growth is due to the decrease in temperature and pressure during the ascent to the wellhead. In the work measures are proposed to reduce the hydrodynamic resistance to rod movement at load reduction.
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Date submitted2005-07-15
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Date accepted2005-08-12
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Date published2006-02-01
Composition and metamorphic changes of chromite ores of deposit "Vershina of r. Alapaiha"
- Authors:
- M. S. Luft
The structure of chromite ores of Vershinsky deposit on the Alapaihi River was studied. The geological and geographical structure of the deposit is considered and the main regularities in the structure of individual ore bodies are revealed. The primary structure of ores is determined. The wide development of deuteric alteration in chromospinelides is shown and its characterization is given. It is established that in the process of metamorphism chromspinelides decompose into high-chromium chromospinelides and chlorites. Significant heterogeneity of chromium ores within the deposit was revealed.
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Date submitted2005-07-23
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Date accepted2005-08-13
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Date published2006-02-01
Improvement of technology of fastening of near-well zone with the purpose of liquidation of overflows in gas-condensate wells
- Authors:
- D. V. Mardashov
The problem of maintaining tightness of tubing annulus in gas and gas condensate reservoirs is especially urgent. Leakiness is caused by the fact that formation fluid in such reservoirs often contains aggressive components - hydrogen sulfide, carbon dioxide, as well as poor insulation of formations containing these agents. This leads to various complications during well operation.
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Date submitted2005-07-12
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Date accepted2005-08-01
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Date published2006-02-01
Study of efficiency of geological and technical measures on increase of productivity of producing wells of OGPD Kinelneft
- Authors:
- I. A. Marinin
The absence of methodological justifications for forcing of liquid withdrawals is noted. Significant geological and field material on well operations consisting in transfer of producing wells of four oil fields to deep well pumps of increased productivity is generalized. The constructed dependences and results of processing of field material confirm high efficiency of the measure.
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Date submitted2005-07-21
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Date accepted2005-08-25
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Date published2006-02-01
Peculiarities of the structure of ores of Rubtsovskoye sinter-polymetallic deposit (Ore Altai)
- Authors:
- D. A. Petrov
The results of studying the structure of ores of the Rubtsovskoye smelter-polymetallic deposit are presented. The material for the research were polished slides of lead-copper-zinc ores. The mineral composition of ores was studied, the order of crystallization of ore minerals was established. Differences in the structure and mineral composition of ores from different parts of the ore body were found and described. The granulometric analysis of mineral grains was carried out on a personal computer using VideoTest and Excel-98 software packages. Chalcopyrite inclusions in sphalerite were studied by electron microscopy. Conclusions were made about the conditions of ore formation and their technological properties.
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Date submitted2005-07-09
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Date accepted2005-08-30
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Date published2006-02-01
Application of organic geochemistry methods to control the movement of WOCs and GOCs
- Authors:
- A. Yu. Popov
Methods of organic geochemistry of naphthides and organic substances of rocks are widely used not only in the search for oil and gas. In the last decade, they have become more and more actively used in the practice of field development. In international practice this direction is known as "reservoir geochemistry" or oil and gas geochemistry and includes a wide range of studies in the field of bitumen science of rocks and geochemistry of hydrocarbon systems. In particular, the ratio of naphthides and bitumens in the development of deposits determines the sources of deposit formation, the paths and distances of primary and secondary migration of hydrocarbons, the specifics of changes in their structure and properties over time at the inflows of accumulations and in a production well.
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Date submitted2005-07-11
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Date accepted2005-08-14
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Date published2006-02-01
Features of geochemistry of Irina-2 hydrothermal ecosystem
- Authors:
- T. E. Samarina
The paper studies geochemical and biological parameters of the site of the Logachev hydrothermal field. The main regularities of living matter distribution, its interaction with mineral sulfides and the role of microorganisms in the formation and decay of sulfide structures are considered. A correlation matrix of biological and geo-chemical parameters and a graph of distribution of biota and element concentrations as a function of distance to the "black smoker" were constructed using data from the Alvin deep-water submersible. Eco-geochemical zonality around the Irina-2 hydrothermal unloading center was revealed. Three zones were identified: high-temperature and low-temperature unloading, as well as the marginal zone of precipitated hydrothermal material from the plume.
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Date submitted2005-07-28
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Date accepted2005-08-11
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Date published2006-02-01
Reassessment of groundwater quality of Nizhnekotlinskiy aquifer complex by radiation indicators
- Authors:
- D. V. Sergeev
The work focuses on reassessment of groundwater quality of the Lower Kotlin aquifer complex by radiation indicators. At the first stage of the research the area radio-hydrochemical sampling of the aquifer complex was carried out with determination of 222 Rn content, as well as indicators of total α- and β-activity. At the second stage, underground water in a limited number of sampling points was identified for radioactive isotopes: 211 Ro, 210 Rb, 226 Ra, 228 Ra, 222 Rn. The radiation safety index was calculated. Directions for further research are proposed.
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Date submitted2005-07-15
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Date accepted2005-08-11
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Date published2006-02-01
Tamponage materials on the basis of magnesia cement for casing cementing in deposits of water-soluble salts. Determination of relative position of wells
- Authors:
- Yu. S. Ugolnikov
New backfill materials suitable for long-term and reliable isolation of salt formations and aquifers are proposed. The materials are based on magnesium cement. Tests have confirmed high efficiency of the materials for cementing casing strings and liquidation of backfills in various wells.
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Date submitted2005-07-23
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Date accepted2005-08-23
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Date published2006-02-01
Determination of relative position of wells
- Authors:
- A. Boshkenyanu
- N. Makovei
There are many situations when it is necessary to know the mutual location in space of two or more wells: in oil-bearing areas with high well density, when drilling directional or horizontal wells next to vertical wells, when directing a well near an abandoned area that may be damaged, when reentering and multilateral wells, when drilling rescue wells, etc. This is primarily necessary during the design phase and the well creation phase. This problem involves some procedures, direct or indirect, which are used to determine the distance between two wells at any of their points, as well as the position of one well relative to the other. This paper presents a general method for determining the spatial direction of a well using deviation measurements and a way to graphically represent this direction in two or three dimensions. The aim of the work is to realize the algorithm used to determine the minimum distance between two wells, which can be easily used if a computer is available.
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Date submitted2005-07-09
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Date accepted2005-08-22
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Date published2006-02-01
Gas mixing in laboratory cores
- Authors:
- Jacek Blicharski
This paper presents the results of methane-nitrogen displacement experiments in a laboratory core. Mathematical model describing transport of mass with respect of gas compressibility and variable flow velocity has been presented. On the basis of this model the dispersivities and the molecular diffusion coefficients have been determined.
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Date submitted2005-07-04
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Date accepted2005-08-11
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Date published2006-02-01
Technical silicification of wood materials
- Authors:
- N. Langhof
- J. Götze
- M. Hengst
- R. B. Heimann
Technical silicification of wood was performed to improve the properties (e.g. wear resistance, water absorption, hardness) of the material. Experimental studies were carried out using two types of wood (oak and spruce) and three different sources of silica including sodium metasilicate (Na 2 SiO 3 ), a colloidal suspension of silica (CSS), and tetraethoxysilane (TEOS). Experiments were done in the temperature range between 40 °С and 80 °C under normal pressure in glass beakers and at higher temperatures (up to 138 °C) and pressures (up to 12 bar) in autoclaves. Besides microscopic investigations (binocular, polarizing microscopy, SEM, cathodoluminescence microscopy), measurements of water absorption and hardness were performed. CL microscopy proved to be the most effective method to reveal the distribution of SiO 2 within and on the surface of the wood samples. Material silicified with colloidal silica and TEOS, respectively absorbed about 40 % less water than untreated specimens. Likewise, the Brinell hardness of treated samples could be increased by nearly 100 % compared to fresh wood samples, which is mainly caused by vitreous silica coatings (generated by sol-gel transformation) at the sample surface.
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Date submitted2005-07-24
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Date accepted2005-08-19
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Date published2006-02-01
Study of well mode in open eruption using nodal analysis
- Authors:
- S. Parashchuk
- M. Marku
The work shows general aspects concerning nodal analysis and its application to naturally flowing wells. Also in this paper we investigate fluid flow through porous media and two-phase flow rising through tubing. For this purpose, we construct curves of inflow performance versus reservoir pressure and curves of tubing performance versus wellhead pressure. Based on these curves, the relationship of operating points at differential wellhead and reservoir pressures is established. Finally, conclusions on the gradient curves and curves of dependence of tubing performance on wellhead pressure and gas-oil ratio are given. In addition, the dynamics of change in the parameters of the production well depending on the dynamics of reservoir parameters and at cessation of production by natural inflow is established.
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Date submitted2005-07-15
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Date accepted2005-08-02
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Date published2006-02-01
Marine/continental facies patterns, sequence stratigraphy and a gocad-3D-modelling of the carboniferous/permian-boundary of the Donetsk basin
- Authors:
- Karin Ritzmann
The Donetsk basin is the southeastern part of the intracratonic Pripyat-Dniepr-Donetsk Riftsystem, striking in a NW-SE direction from Belarus through Ukraine, over a distance of c. 1500 km the East-European Craton. The profiles of Late Carboniferous and Permian are characterised by interfingering marine-continental sediments in the Donetsk basin. Therefore, the possibility exists, to correlate the non-marine Carboniferous / Permian profiles of Western-Europe with the global marine stratigraphical scale. Detailed analyses of facies patterns and the reconstruction of the depositional setting are based on extensive fieldwork within the Donetsk basin. Microfacies analyses and micropalaeontological investigations of 110 limestone specimens were carried out. Furthermore, the straticraphic cross-sections (stratotype-key-section) of Upper Carboniferous and Lower Permian succession of Artemovsk area was correlated with the marine dominated stratotype section of the Pre-Donetsk basin, the well Skosyrskaya N 4199 (Alekseeva et al. 1983). The description of 2455 m of lithostratigraphic profiles of Makarov et al. (1985 a) and Aizenverg et al. (1975) and additional facies profiles of 51 wells of Makarov et al. (1985 b) were used together with own data to develop a sequence-stratigraphical deposition model of the Donetsk basin. The maximum flooding surfaces of the transgressive system tracts are represented by carbonate layers. The sequence boundaries correspond to bases of erosive fluvial channels. SB and mfs are distinctive horizons throughout the studied area. The results of facies analysis and the sequence-stratigraphical deposition-model were used to develop a relative sea-level curve of the Donetsk basin. The deposition-model of Izart et al. (1998) was specified. This was the base for the correlation of the relative sea-level curve of the Donetsk basin with the global sea-level curve as well as for the estimation of climatic fluctuations as controlling factors of the sea level fluctuations. A GOCAD-3D-model was developed to analyse the facies patterns in three dimensions and to understand subsidence processes during the basin evolution.
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Date submitted2005-07-04
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Date accepted2005-08-11
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Date published2006-02-01
Application of physico-chemical methods at concentrates finishing (on the example of OOO Solovyevsky Priisk)
- Authors:
- V. S. Alekseev
The method of pretreatment of concentrates with chemical reagents based on halides to increase the recovery of fine and fine gold was proposed. Rational dosages of reagents were established and a chain scheme of the slurry processing unit was developed, which provides for pre-treatment of concentrates coming from dredges and washing machines.
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Date submitted2005-07-05
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Date accepted2005-08-19
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Date published2006-02-01
Technology of wastewater treatment and processing of solid waste containing chromium ions
- Authors:
- S. N. Alekseeva
The technology of processing waste containing chromium anions and metal cations, providing their selective extraction with simultaneous purification of solutions up to the norms of maximum permissible concentrations was developed.
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Date submitted2005-07-13
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Date accepted2005-08-01
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Date published2006-02-01
Calculation of dissipation energies and parameters of stress waves at explosion of cylindrical explosive charges in a rock
- Authors:
- V. E. Brovin
- M. G. Menzhulin
A significant part of energy (up to 70%) in explosive destruction is irreversibly spent on heating of rock particles in the near zone and represents dissipative losses. The consequence of intensive dissipative processes is an increase in temperature and the development of induced microcracking in the medium deformed by the explosion. A significant fraction of energy remains in the explosion cavity in the form of internal energy of detonation products and can also be attributed to dissipative losses. Thus, only a part of the explosion energy is spent on the formation of mechanical disturbances. Therefore, when solving problems about the formation and propagation of stress waves, it is necessary to keep in mind the effects of energy dissipation.
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Date submitted2005-07-19
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Date accepted2005-08-07
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Date published2006-02-01
Use of bioactive substances at recultivation of bulk dumps and technogenic formations
- Authors:
- N. A. Gasparyan
One of the main sources of hazardous air pollution in the territories of mining, metallurgical and enrichment complexes and adjacent areas are dusty surfaces of bulk dumps. As a result of wind erosion fine-dispersed fractions are the most dangerous from the point of view of impact on respiratory organs, easily carried away from the surface for long distances. The method providing reduction of dust formation and dust transfer of fine-dispersed materials, increase of bioproductivity of bulk dumps and quick reclamation is offered. The results of tests of the protective coating for resistance to air flow and the results of bioproductivity of the treated surfaces of dumps are presented.
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Date submitted2005-07-27
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Date accepted2005-08-30
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Date published2006-02-01
Technological and technical solutions for prevention and extinguishing of endogenous fires at the mines of AO UCC Yuzhkuzbassugol
- Authors:
- R. A. Govor
The risk of endogenous fires at the mines of Southern Kuzbass, developing mainly coal seams prone to spontaneous combustion, is quite high. The occurrence of underground fires leads to significant material losses, both direct and for emergency rescue work. The data on the volumes of production from thick seams at the mines of AO UCC Yuzhkuzbassugol and on the number of endogenous fires in recent years are given. A comprehensive system of measures to prevent and extinguish endogenous fires at the stage of design, development of the mining area passport, mining and isolation of the mined-out space is proposed. Application of the system will significantly reduce the risk of spontaneous combustion of coal, ensure the safety of mining coal seams prone to spontaneous combustion, and significantly reduce material losses associated with extinguishing endogenous fires.
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Date submitted2005-07-15
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Date accepted2005-08-12
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Date published2006-02-01
Methodology and organization of filming works at creation of educational video films on mining
- Authors:
- V. S. Gorbatov
- A. V. Seleznev
- K. K. Toropchin
In connection with the sharp renewal of coal mining techniques and technologies with the use of modern equipment, as well as with the lack of this equipment in the university there is an urgent need to improve the quality of training with the use of technical means and videos. The description of the organization of filming works, methods of script creation, editing, sound superimposition and use of video films in the educational process are given. According to the program of filming works the technological system of the mine is divided into subsystems: carrying out of preparatory workings; carrying out of cleaning works.
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Date submitted2005-07-24
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Date accepted2005-08-26
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Date published2006-02-01
X-ray spectral studies of sorption mechanism on the surface of iron-manganese nodules
- Authors:
- M. Yu. Ionova
A method of analyzing the changes in the state of the sorbent surface depending on the time of sorption of petroleum products from aqueous solutions for different granulometric composition of the initial sorbent using coherent scattered X-ray radiation has been developed. The theoretical basis and experimental estimates of changes in the angle of coherently scattered photons from the sorbent surface are given. It is obtained that the angle of coherent scattering of photons depends on the class of sor-bent coarseness. In the process of sorption there is a change in the surface structure, which leads to a change in the scattering angle. Thus, knowing the angle of scattered radiation, it is possible to determine the type of the surface of any porous sorbent, as well as to estimate the degree of filling of the surface with the sorbed substance.
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Date submitted2005-07-15
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Date accepted2005-08-05
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Date published2006-02-01
Modern mining enterprise as an integral technological system for coal mining and processing (on the example of OAO Polosukhinskaya Mine)
At present, there are a number of problems at the mine OAO Polosukhinskaya: depletion of mineral reserves; non-compliance of ACS technologies with modern levels of development; low quality of coal. The analysis carried out on all aspects of the technological system showed that for further development and effective work of the enterprise it is necessary to take a number of measures to maintain the existing workability. These measures are expressed in the following main directions: deposit re-conservation at layer 30 of the mining sector "Antonovsky-3", as well as preparation of new working sectors within the existing mining allotment using the technological solutions available at the mine; introduction the latest automatic control system ACS TP, as well as measures aimed at improving labor conditions and safety; improving the quality of mined minerals through the operation of the Antonovskaya processing plant by introducing a process monitoring and control system based on Granch SBTC2 controllers, which will significantly improve the level of mining safety and environmental protection.
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Date submitted2005-07-02
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Date accepted2005-08-08
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Date published2006-02-01
Regularities of acoustic emission in coal samples under different modes of mechanical loading
- Authors:
- S. V. Kuchurin
Experimental results of studying the patterns of acoustic emission (AE) in anthracite samples under uniaxial tests with specified loading and displacement rates, as well as under axisymmetric triaxial compression under different levels of lateral pressure are presented. Possibilities of estimation of physical and mechanical properties of coal and identification of deformation stages and boundaries between these stages by informative parameters of AE by comparing graphs of AE dependences and deformation characteristics have been revealed. The presence of peculiarities in AE properties of coal depending on modes of research and schemes of mechanical loading of samples has been established.
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Date submitted2005-07-24
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Date accepted2005-08-25
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Date published2006-02-01
Research of new ways of processing of plant biomass waste in agricultural production
- Authors:
- A. N. Nikulin
The annual amount of organic waste in different sectors of the national economy of Russia is more than 390 mln tons. Effective utilization of processed solid biomass is provided by creation of artificial structured complexes - blocks, briquettes, pellets for subsequent combustion in household or industrial furnace devices. The new method of briquettes production is based on the experimentally established, not-known earlier phenomenon of migration in the briquette thickness of complex fluid systems, and includes preparation of briquette mass by mixing chopped straw with binder fine-dispersed material, introduced in dry form; briquetting of the mass and subsequent temperature treatment at 120-150°С.
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Date submitted2005-07-25
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Date accepted2005-08-09
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Date published2006-02-01
Development of technological scheme of processing and storage of wastes of different origin
- Authors:
- O. A. Odrova
The article presents a comparative analysis of waste treatment and utilization methods, as well as the ratio of waste treatment methods in different countries. The components of the technological complex are defined: quarry, metallurgical plant, sorting plant, transportation system and landfill. Their mutual location is determined, environmental requirements excluding water, air and soil pollution are developed. The scheme of interaction of elements showing the connection between industrial and mining enterprises is developed. The choice of optimal waste processing technology is substantiated.
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Date submitted2005-07-20
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Date accepted2005-08-02
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Date published2006-02-01
To the technique of estimation of activated disturbances at explosive crushing of rocks
- Authors:
- I. S. Osipov
The work is related to the solution of the problem of predetermined change of properties and states of rocks by surfactants in relation to improving the quality of rock crushing by explosive method. The regularities of the origin and development of cracks in rocks loaded in the surfactant medium are analyzed, the obtained parameters of crack propagation allow estimating the probability of destruction of the rock massif. The questions of determination of perturbations in the medium activated by blasting are considered.
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Date submitted2005-07-25
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Date accepted2005-08-11
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Date published2006-02-01
Research of processes of extraction of large fractions of gold at underwater method of development of placer deposits
- Authors:
- G. M. Potapchuk
The results of experimental studies of the vulnerability of high-density particles of valuable minerals being drawn into the suction streams of the screening device are presented. Technological parameters of suction screening device are determined.
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Date submitted2005-07-06
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Date accepted2005-08-17
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Date published2006-02-01
About local forecast of the zones dangerous by gas-dynamic phenomena on the south-eastern section of the mine field of the mine BKPRU-2 of OAO Uralkali
- Authors:
- N. A. Salamatina
The geological conditions of potash reservoir mining at the Verkhnekamskoe deposit are characterized. The methods of forecasting and ways to combat gas dynamic phenomena are described. The currently used methodology of geological forecasting for areas characterized by gas-dynamic phenomena is analyzed. Decision-making procedures for predicting gas dynamic phenomena in the conditions of the mine BUPRU-2 and mapped hazardous areas characterized by gas dynamic phenomena in the southeastern part of the mine field.
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Date submitted2005-07-14
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Date accepted2005-08-21
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Date published2006-02-01
Directional change of rock characteristics by surface-active substances
- Authors:
- V. V. Synbulatov
The paper investigates the use of surface-active substances (surfactants) for directed change of properties and state of rocks for improvement of methods of combating mining strikes. The results of experimental drilling of unloading slots by flushing with surfactant solutions are discussed. The proposed technology allows to increase the speed of mechanical drilling of rocks by 40%. The use of surfactants as a means of rock plasticization and activation of creep and stress relaxation processes allows to reduce the potential impact hazard of rocks. Further research in this direction is justified.
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Date submitted2005-07-23
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Date accepted2005-08-25
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Date published2006-02-01
Geoecological assessment of the territory of Tomsk-Severskaya industrial agglomeration based on the results of dust-aerosol fallout study
- Authors:
- A. V. Talovskaya
The results of the study of dust-aerosol deposition in snow cover are presented. The mineral composition, radiogeochemical and geochemical characteristics of solid snow precipitation were studied. The studies were carried out by biological testing on Drosophilamelanogaster using modern analytical methods (atomic emission spectrometry with inductively coupled plasma; intra-instrumental neutron activation method; atom-absorption analysis), as well as electron microscopy, X-ray diffraction analysis, cathodic pulse luminescence and f-radiography. A comprehensive geo-ecological-geographical assessment of the territory of Tomsk-Severskaya industrial agglomeration is presented. Nuclear fuel industry enterprises are located on this territory.
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Date submitted2005-07-10
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Date accepted2005-08-03
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Date published2006-02-01
Justification of parameters of extraction of sylvinite ores from pillars with application of auger excavation
- Authors:
- V. I. Shabun
- Yu. G. Sirenko
On the example of the Starobino deposit, the criteria determining the choice of development systems and possible ways to increase potash recovery are considered. Various schemes for extraction of sylvinite from the pillars using drill-and-screw technology were proposed. A methodology of geomechanical substantiation of parameters of extraction of targets is developed. The results of evaluation of stress-strain state of the targets and the host massif for characteristic time moments of existence of the excavated spaces outlining the targets are presented.
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Date submitted2005-07-13
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Date accepted2005-08-28
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Date published2006-02-01
Copper extraction from diluted solutions using hollow fiber supported liquid membranes
Copper extraction from wastewater using a liquid membrane based on hollow fibers impregnated with M5640 material has been experimentally investigated. The permeability coefficients increase with increasing pH of the initial solution. At high concentration of hydrogen ions in the stock solution, the process was controlled by diffusion of CuR2 through the liquid membrane. At low concentrations of hydrogen ions, the permeability becomes independent of this factor and the process is controlled by diffusion through an aqueous diffusion layer formed at the interface between the stock solution and the liquid membrane. Experimental studies were consistent with the assumptions of the Danesi model.
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Date submitted2005-07-05
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Date accepted2005-08-10
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Date published2006-02-01
Experimental researches on metals extraction with organic solvents by new methods using liquid membranes
- Authors:
- Mihaela Caltaru
- Nicolae Petrescu
A hollow fiber based liquid membrane impregnated with organic solvent M5640 diluted with kerosene is an attractive method to extract copper from low copper content (500ppm) industrial wastewater. The flow rate of the feed solution affects the permeability of the membrane. The optimum flow rates of the stock solution and strip solution were 2080 mL/h and 6264 mL/h, respectively. It can be considered that under the above conditions the resistance to mass transfer was close to the minimum due to the small thickness of the diffusion boundary layer.
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Date submitted2005-07-13
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Date accepted2005-08-27
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Date published2006-02-01
Estimation of maximum cost of CO2 in EOR projects
- Authors:
- Piotr Kosowski
The problem of estimating the maximum acceptable level of CO2 costs in enhanced oil recovery projects is considered. This problem is connected with the limitations of the Kyoto Protocol and limitation of greenhouse gas emission. The ways of estimation of such costs are shown on the example of one of the fields in Poland.
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Date submitted2005-07-19
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Date accepted2005-08-13
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Date published2006-02-01
Efficiency of methane drainage of coal seams in Polish underground mines
- Authors:
- Sebastian Napieraj
Coal exploitation in Polish mines is conducted under conditions of associated natural hazards such as methane, fire and coal dust explosion hazards. Orogen drainage is one of the main means of self-monitoring of methane hazards. The possibility of orogen drainage has been approached both from the surface and from underground workings with openings. Methane drainage in a Polish coal mine is caused by: former mine workings, dog-hole workings, especially during their sinking, and haulm. Methane drainage is estimated by the methane flux accompanied in drainage processes to the total methane flux from drainage and ventilation.
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Date submitted2005-07-26
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Date accepted2005-08-13
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Date published2006-02-01
Research on biosurfactants – trehalose lipids in rhodococci
The article studies biosurfactants synthesized by microorganisms, which due to their physicochemical properties significantly reduce surface and interfacial tension both in aqueous solutions and in hydrocarbon mixtures.
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Date submitted2005-07-13
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Date accepted2005-08-27
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Date published2006-02-01
Evalation of seedlings tolerance to toxic contrentatio of aluminium ions in breeding material of triticale
- Authors:
- Kamila Nowosad
Genetic variability of breeding materials for resistance to aluminum kions, which, being one of the main components of soils, is an important factor in limiting plant growth in soils with acidity below 5.0 pH and can limit growth at levels of acidity up to 5.5 pH, is evaluated.
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Date submitted2005-07-18
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Date accepted2005-08-04
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Date published2006-02-01
Changes in the blasting techniques during recent years in Poland
- Authors:
- Magdalena Piżuk
Poland is a country that is rich in mineral resources. Many of them are extracted with the help of blasting technologies both in underground and open pit mining. The article presents changes and trends in the development of blasting technologies in recent years in Poland. Particular attention is paid to the emergence on the market of business entities specializing in the provision of services for blasting in mines, as well as the mechanization of blasting operations and the development of modern technologies for the production of explosives. In addition, the article highlights the practice of open-pit mining to prevent the harmful effects of blasting on the environment. In addition, various methods of blasting development and the use of computer programs on these issues are presented.
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Date submitted2005-07-20
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Date accepted2005-08-28
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Date published2006-02-01
Assessment of Industrial Waste Storage Facility Impact on Groundwater
- Authors:
- Renata Rogowska-Kwas
- Jan Macuda
Most industrial wastes are environmentally harmful. First of all, this applies to chemical wastes containing leachable organic and inorganic components. Leaky or poorly sealed landfills lead to groundwater seepage. They are typically characterized by high levels of ammonia, arsenic, chromium, lead, copper, zinc, iron, and organic compounds. The results of laboratory analyses of landfill leachates seeping into the soil and water environment are presented and quantitative changes in groundwater flowing from the area of the landfill under study are discussed.
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Date submitted2005-07-14
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Date accepted2005-08-10
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Date published2006-02-01
Methodology for assessing the environmental effects during the mining of solid rock by taking into account non-explosive mining techniques
- Authors:
- Pierre Schmieder
The close proximity of mining operations to other commercial and residential properties, conservation areas, and public sensitivity to emissions has led to negative attitudes towards mining in the surrounding areas. Above all, the use of drilling and blasting is objected to, with demands for more environmentally friendly mining methods. It is in this context that non-explosive mining methods are being considered as an option. Indeed, for some quarry operators, the use of such methods is the only alternative. The question is what are the real advantages of these methods and what is the balance between the possible improvement of environmental impacts on the one hand and the technological potential as well as the costs on the other. This paper will therefore consider aspects of the assessment of extraction technologies in the context of their environmental impacts and costs. It is intended to assess the mining techniques for solid rock in their entirety. This paper will therefore look at the aspects for assessing mining techniques in the context of their environmental impact and the costs.
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Date submitted2005-07-09
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Date accepted2005-08-25
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Date published2006-02-01
Plant protection in ecological agriculture
- Authors:
- Sebastian Stanczyk
Various ways of increasing plant protection and agricultural production without the use of synthetic plant protection products and fertilizers have been studied: agrotechnical method, mechanical method, biological method of plant protection, use of ionizing radiation and plant ex-tracts, and selection method.
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Date submitted2005-07-02
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Date accepted2005-08-03
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Date published2006-02-01
Adaptation of geographical information system in net water-supply and sewage enterprises
- Authors:
- Ewa Wajs
The article discusses the concept and functions of geographic information systems (GIS), which is a new tool for analyzing and interpreting data about spatial objects and processing digital data into maps, models of three-dimensional equations or logical expressions.
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Date submitted2005-07-14
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Date accepted2005-08-29
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Date published2006-02-01
The technical investigations of sprayers in Poland in aspect of protection of natural environment
- Authors:
- Grzegorz Wilczok
Pollution of the agricultural environment due to the use of chemicals is a serious problem in many countries. Its aim should be to minimize the threat of contamination arising from chemical crop protection. Chemical intervention will only be done properly when it is done with technically efficient equipment. Therefore, it became necessary to introduce certification studies of plant protection equipment. Since 1999 mandatory technical tests of sprayers have been started in Poland. These tests check the serviceability of the sprayer. The legal basis for the system of technical tests of sprayers was the Plant Protection Act.
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Date submitted2005-07-03
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Date accepted2005-08-16
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Date published2006-02-01
Application of anti-turbulent additive in pumping diesel fuel through the main pipelines of OAO AK Transnefteprodukt
- Authors:
- I. P. Abramov
- O. I. Dzardanov
Aspects of practical application of antiturbulent additive for diesel fuel transportation by main pipelines are studied. Experimental data on pilot and industrial transportation of diesel fuel with Nekadd-447 anti-turbulent additive are analyzed.
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Date submitted2005-07-03
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Date accepted2005-08-23
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Date published2006-02-01
Calculation of maximum allowable working pressure at long-term operation of main oil product pipelines
- Authors:
- I. P. Abramov
- I. Yu. Podavalov
The article deals with the issues of strength calculations of main oil pipelines, strength characteristics of defective pipe sections, pipe wall defects and their geometry. An automated program for calculating the load-bearing capacity of a trunk oil-product pipeline with the construction of a load-bearing capacity diagram of a section with a line of hydraulic gradient, which determines the maximum allowable working pressure at the outlet of an oil pumping station according to strength indicators, is developed.
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Date submitted2005-07-04
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Date accepted2005-08-08
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Date published2006-02-01
Research of hydro-impact actuators of tunneling complex for Metrostroy of St. Petersburg
- Authors:
- A. Ya. Burak
A tunneling complex for St. Petersburg Metrostroy with the use of a manipulator with a water hammer as an actuator is considered. It is proposed to use a dual impact system in the design of the water hammer for effective rock destruction. Works on research of twin impact systems at interaction with rocks of different properties are carried out. An experimental improved stand for the study of impact systems in interaction with rocks has been created.
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Date submitted2005-07-12
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Date accepted2005-08-01
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Date published2006-02-01
Study of physical and mechanical properties of rock mass of preparatory faces
- Authors:
- M. Yu. Dudko
Designs of devices developed for studying physical-mechanical properties of rock mass of preparatory faces and the results obtained in the process of research are considered.
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Date submitted2005-07-19
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Date accepted2005-08-10
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Date published2006-02-01
Asynchronous electromechanical converter of reciprocating-rotational motion
- Authors:
- Yu. D. Orekhov
The article considers a promising method of drilling and well cleaning with the use of a dynamically counterbalanced drilling rig on a supporting cable, characterized by increased operational parameters and simplicity of construction. It is possible to use this drilling rig for a wide range of works. A progressive step in this area can be the creation of a drilling unit with a drive from an asynchronous squirrel cage motor. At the Department of Electrical Engineering and Electromechanics research of dynamically counterbalanced drilling unit is carried out, a mathematical model is developed and an experimental unit is created to study the mode of operation of the drilling unit.
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Date submitted2005-07-26
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Date accepted2005-08-17
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Date published2006-02-01
Research of static and dynamic quality indicators of the DC valve electric drive at different typical speed regulators
- Authors:
- Ya. I. Peshev
The basic criteria and parameters of tuning of the subordinate control systems are described. The description of the laboratory bench design is given, the results of practical research of electric drive quality indicators are given, the comparative analysis of typical speed regulators is given and the most effective one is selected.
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Date submitted2005-07-13
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Date accepted2005-08-25
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Date published2006-02-01
Justification of the layout scheme and parameters of the unit for the development of bottom fields of the Baltic Sea
- Authors:
- D. V. Smirnov
At present Russia is experiencing a significant deficit of manganese ores. The deposits of ferromanganese nodules of the Baltic Sea can be used as a source of manganese. Several equipment designs have been created for the development of resources on the seabed, but all of them have a number of drawbacks. An innovative plant with intermediate drives for the development of the Baltic Sea bottom sediments has been developed taking into account these disadvantages.
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Date submitted2005-07-16
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Date accepted2005-08-12
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Date published2006-02-01
Adjustment of multizone furnaces for growing crystals
- Authors:
- K. German
- A. Rekopf
- Kh. Zaureman
One of the most common and effective methods of crystal growth is the method of crystal drawing from liquid melt. Crystal growth is achieved due to the movement of the crystallization front by forming the thermal regime with the help of independently controlled heaters. The article deals with the automation of multizone furnaces for crystal growth using the vertical freezing method (VGF method), with the main technological requirements being the accuracy of tuning in steady-state and dynamic regimes.
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Date submitted2005-07-12
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Date accepted2005-08-15
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Date published2006-02-01
Strength analysis of the reason of initiation of fatigue defects in winding drums
- Authors:
- Dariusz Bańdo
- Filip Matachowski
Рассматриваются причины возникновения поломок барабанных лебедок лифтового оборудования, вызванных усталостью материала. Для проведения анализа прочности конструкций использованы дефектоскопия и анализ напряженно-деформированного состояния с применением пакета программного обеспечения NE/Nastran 8.3 для Windows. Результаты расчетов могут быть использованы для модернизации барабанных лебедок лифтового оборудования.
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Date submitted2005-07-09
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Date accepted2005-08-10
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Date published2006-02-01
Computer-aided design of an industrial robot designed to perform a casting operation
This paper discusses the results of research work related to computer-aided assisted design of an industrial molding robot. The authors used interactive graphics techniques commonly used in the design of components, parts and assemblies of equipment working in the fields of mechanics, electricity, electromechanics and electronics.
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Date submitted2005-07-10
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Date accepted2005-08-04
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Date published2006-02-01
Design and operation of industrial robot used for painting of straight surfaces
This article discusses the results of the research work on the creation of a computer-assisted design industrial robot for surface coating. The authors used interactive graphics techniques characteristic of components, parts and assemblies of equipment working in the field of mechanics, electricity, electromechanics and electronics.
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Date submitted2005-07-21
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Date accepted2005-08-20
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Date published2006-02-01
Structural and thermal stresses occurring during press-fit mounting process
- Authors:
- Krzysztof Michalczyk
The paper describes a method of calculating the pressure connection by cooling or heating one of the elements and based on the temperature balance. It is found that in some conditions the mounting stresses may exceed the nominal stresses. A method of calculating these stresses with high accuracy is proposed. The method is substantiated by numerical analysis.
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Date submitted2005-07-17
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Date accepted2005-08-25
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Date published2006-02-01
A systematic of cleaning machines in the mineral processing industry
- Authors:
- Hagen Müller
Cleaning machines for mineral processing of raw materials are considered. The purification process is subdivided into two sub-processes - dissolution and separation. Based on the analysis of effects and operating principles, these processes were assigned machine types and systematized. Construction catalogs were used to achieve greater clarity and to manage the results obtained.
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Date submitted2005-07-19
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Date accepted2005-08-07
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Date published2006-02-01
Computer modeling of thermal operation of water cooling unit of magnesium electrolyzer anodes
- Authors:
- E. A. Alsufev
The paper presents the results of computer thermal calculation of a water-cooled unit for anode cooling in bubble-free magnesium electrolyzers. Matlab program was used for numerical calculations. The program includes the PDE toolbox for numerical simulation of non-stationary physical fields described by partial differential equations.
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Date submitted2005-07-14
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Date accepted2005-08-17
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Date published2006-02-01
Increase of work efficiency of the heavy-medium separator
- Authors:
- S. V. Artemenko
The article deals with the problems of mineral processing in separators with dense medium. Low and medium grade coals are not sufficiently concentrated in serial separator designs. The paper proposes an innovative design of a dense media separator with a membrane installed in its bath. The membrane is driven by an eccentric drive. Prevention of mixing of light fractions with heavy fractions is achieved due to the uniform distribution of material throughout the volume of the bath under the action of horizontal pulsating flows created by the movement of the diaphragm. As a result, more efficient concentration of material is observed compared to concentration in existing separator designs.
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Date submitted2005-07-11
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Date accepted2005-08-05
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Date published2006-02-01
Application of multifactor planning of experiment at research of flotability of calcium-containing minerals
- Authors:
- Yu. P. Batura
- M. V. Uglovskaya
The article describes the possibility of developing a technology for processing quartz-carbon-containing fluorite ores of the Olympic section of the Garsonuyskoye deposit, carbon-tin modulus of which is equal to 0.95. In the course of the study, experimental research on the beneficiation of carbon-containing fluorite ores was carried out. The task of the research included identification of the main factors determining the flotation properties of fluorite and calcium feldspar, study of the interaction of minerals with flotation agents, development of the optimal reaction mode of flotation enrichment of fluorite and calcium feldspar. As a result of the conducted research the flotation scheme for obtaining carbonaceous and fluorite (FF-97A) concentrates was developed and recommended for industrial tests.
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Date submitted2005-07-16
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Date accepted2005-08-03
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Date published2006-02-01
Modeling of non-stationary process in metallurgical unit (thermophysical models in fixed layer)
- Authors:
- M. N. Bogatyreva
Currently, research and development works are underway aimed at comprehensive reconstruction of the smelting shop of Pechenganickel Mining and Processing Plant. The research is aimed at improving the efficiency of smelting process technology, recovery of non-ferrous metals and solving urgent environmental problems.
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Date submitted2005-07-15
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Date accepted2005-08-28
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Date published2006-02-01
Determination of dissolution potentials of copper and nickel alloys containing precious metals and electrolyte selection
- Authors:
- D. V. Gorlenkov
Anodes containing non-ferrous and precious metals are cast from the metal phase supplied to electrical enterprises after sorting by individual elements. The article deals with the main aspects of determining the dissolution potentials of copper and nickel alloys containing precious metals in laboratory conditions and the choice of electrolyte for their dissolution. The chemical composition of the investigated anode is given. Graphs of time and voltage dependence of the obtained potentials are given. The influence of some impurities on the process is explained. The conclusion about rationality of the use of salt electrolyte is made.
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Date submitted2005-07-25
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Date accepted2005-08-11
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Date published2006-02-01
Research of enrichment of ilmenite-rutile-zircon sands of Tarskoye deposit with obtaining of titanium-containing concentrates
- Authors:
- N. N. Grishkin
The paper studies the possibilities of processing titaniferrite-rutile-zircon sands of the Tarskoye deposit and proposes technological schemes for efficient production of titanium-containing concentrate. Tests on application of magnetic and corona-electrostatic separation for obtaining pure mineral concentrates have been carried out. Based on the conducted research, a new technological scheme of mineral raw material processing was developed and will be implemented at the Tarsky Mining and Processing Plant.
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Date submitted2005-07-20
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Date accepted2005-08-03
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Date published2006-02-01
Creation of scientific and technological bases of iron-manganese nodule processing
- Authors:
- A. A. Darin
The main methods of ferromanganese nodule (FMN) processing are considered: leaching with preliminary sulfatizing roasting and sulfuric acid leaching. On the basis of thermodynamic analysis and experimental results the conclusion is made about the applicability of both methods for processing of FMS in the Gulf of Finland.
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Date submitted2005-07-26
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Date accepted2005-08-08
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Date published2006-02-01
Improvement of magnetic separation of ferromagnetic materials
- Authors:
- V. V. Demin
Magnetic flocculation is of great importance in magnetic beneficiation processes. It is unavoidable in any kind of processing of fine-grained iron-containing materials. This phenomenon reduces the efficiency of both classification and grinding, and also has a negative impact on wet magnetic separation. A promising way to solve the problem of magnetic agglomeration is the use of sodium silicate as a reacting agent. Improvement of the wet magnetic separation process will make it possible to grind thinly melted ores up to complete stripping and obtain high quality concentrates. Intensification of magnetic separation will allow processing rebellious ores, the beneficiation of which is currently associated with significant losses of the iron component.
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Date submitted2005-07-09
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Date accepted2005-08-03
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Date published2006-02-01
Principles of multimedia information retrieval system based on foundry defects atlases in several languages
- Authors:
- A. A. Kozlov
- A. V. Petrukhin
- V. A. Kamaev
- Yu. Bast
At present, the task of identifying casting defects, revealing the causes of their formation and ways of elimination is still relevant. To solve these problems, reference books describing various casting defects are used. These atlases are written in different languages and compiled by well-known specialists, but do not cover the whole range of foundry defects, partially complementing each other. The article describes the principles of development of a unified multimedia information retrieval system based on foundry defects atlases.
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Date submitted2005-07-26
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Date accepted2005-08-18
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Date published2006-02-01
Modern state of processing of electrolyte sludge of copper production
- Authors:
- Yu. B. Lyapishchev
The article considers the main technological schemes of processing of electrolyte sludge from copper production. The main advantages and disadvantages of sintering, selenide, sulfatizing and combined methods are described. The possibilities of the technological scheme of nitrate leaching are studied.
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Date submitted2005-07-11
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Date accepted2005-08-23
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Date published2006-02-01
Product quality management at the enterprises of aluminum industry
- Authors:
- E. K. Yurkova
Modern methods of technical control based on mathematical statistics methods used at Novokuznetsk Aluminum Plant are considered. The new information-technological system introduced in 2004 allows to evaluate the stability of electrolysis production processes by the following main parameters: cryolite ratio, metal level, electrolyte level and temperature, calcium content, frequency of anodic actions. The application of the new software to control electrolyte composition is shown by means of control charts, Pareto diagrams and histograms. It is revealed that the highest percentage of deviations is observed for the parameters obtained by instrumental measurement (metal level, electrolyte level). Compliance with normative and technical documentation is not a quality criterion. To ensure the stability and maintenance of quality indicators and parameters of the electrolysis process at an acceptable level, a number of measures are proposed.
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Date submitted2005-07-10
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Date accepted2005-08-01
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Date published2006-02-01
To the question of delimitation of the state ownership on the land
- Authors:
- E. A. Kochneva
The delimitation of state ownership of land as a process of attributing land plots to the ownership of the Russian Federation, its constituent entities or municipalities is a topical issue of land policy, since it is associated with the redistribution of land payments between the subjects of land relations. The problems associated with the realization of this process are considered, and the ways of their solution are proposed.
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Date submitted2005-07-14
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Date accepted2005-08-23
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Date published2006-02-01
Cost estimation of completeness and quality of mineral extraction from subsoil
- Authors:
- K. F. Melikhova
Globalization of the international mineral resources market leads to a high level of competition between producers of raw materials. The fundamental strategies for the survival of the mining industry in these conditions are to improve the efficiency and quality of mineral extraction, reduce the cost of mining and processing of mineral raw materials. The well-known criterion - the profit received from 1 ton of extracted reserves, does not reflect the dynamics of the above factors. Therefore, a new algorithm for assessing the specific cost criteria of efficiency and quality of copper ore extraction is proposed and demonstrated on the example of Zhezkazgan copper and lead deposit, a new algorithm for assessing the specific cost criteria of efficiency and quality of copper ore extraction.
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Date submitted2005-07-11
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Date accepted2005-08-20
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Date published2006-02-01
Research of geometrical and strength parameters of water-insulating cofferdams for protection from water inflows from liquidated mines
- Authors:
- M. A. Ryazanov
Computer modeling of various designs of water-insulating cofferdams intended for protection against water inflow from mine workings of liquidated mines is considered. On finite-element models the stress-strain state of flat cofferdams is investigated, isopoles of equivalent compressive and equivalent tensile stresses in the cofferdam and the surrounding rock mass are constructed. The most dangerous sections were determined and the equivalent stresses were plotted. The areas of application and the necessary geometric and strength parameters of flat lintels are established. To increase the bearing capacity and reduce the cost of installation of lintels, it is proposed to use curved lintels, which allow to significantly reduce tensile stresses and thereby increase reliability and expand the area of application of lintels. The rational parameters and application area of curvilinear lintels have been established.
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Date submitted2005-07-10
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Date accepted2005-08-04
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Date published2006-02-01
Computer modeling and determination of rational parameters of non-shooting reinforcement of vertical shafts
- Authors:
- A. A. Urmazov
The article deals with computer modeling of rigid reinforcement in vertical shafts of various structures. Finite element models of typical multilink reinforcement (on the example of typical scheme K-2 of the design institute Yuzhgiproshakht), cantilever, cantilever-joint and block reinforcement schemes are constructed. As a result of the conducted research it has been established that slope-free reinforcement schemes with a significant reduction in the number of metal components provide the same and even higher hardness than typical structures. The areas of application and rational parameters of non-braced schemes of reinforcement used in cage and skip shafts with different intensity of hoisting are determined.
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Date submitted2005-07-20
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Date accepted2005-08-20
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Date published2006-02-01
Curing of high-strength concrete in natural winter conditions
- Authors:
- Paweł Jednacz
- Joanna Hydzik
December usually means the beginning of frost. But this does not mean that concrete paving should be put on hold in sub-zero temperatures. The new approach to molding with ultra-fine materials, supported by the active development of new admix-tours, has paved the way for amazing advances in concrete technology in recent years. The rapid development of concrete technology makes it possible to easily prepare high-performance concrete. The question arises whether high-performance concrete can be created at low temperatures. Other examples in civil engineering realized in sub-zero temperatures also suggest this question.
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Date submitted2005-07-06
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Date accepted2005-08-27
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Date published2006-02-01
Aggressive marketing policy of salt-mining enterprise
- Authors:
- N. I. Baichurina
The article studies the possibilities of increasing the competitiveness of Russian salt mining and salt processing companies in the domestic market. The current situation on the Russian markets of technical and white salt is analyzed and forecasts for 2005 are made. The effectiveness of aggressive marketing policy in organization and sales stimulation is shown on the example of Iletsksol Salt Mining Company OJSC. The regional pricing strategy of the company is developed, economic-mathematical models of optimal regional distribution of production are developed. The annual ecological and economic effect from the implementation of the proposed measures is calculated.
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Date submitted2005-07-02
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Date accepted2005-08-14
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Date published2006-02-01
Model of management of calculations with buyers. New approaches in the organization of accounting and internal control
- Authors:
- A. V. Bukreeva
The article describes the model of consumer payment control and the organizational mechanism of its implementation in Bashkirgas. The principles underlying the new accounting system and the stages of its implementation are described, the scheme of information exchange between employees of the company's structural units and the description of primary and other documents for analytical accounting of customer payments are presented. The model makes it possible to integrate accounting and management accounting on the basis of full automation of the process and significant organizational changes, and to improve the internal control system, which contributes to a 2-fold reduction in public debt and improvement of other financial indicators of the company's activity.
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Date submitted2005-07-19
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Date accepted2005-08-20
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Date published2006-02-01
Qualification structure of personnel as an indicator of efficiency of labor force use
- Authors:
- A. A. Zamalieva
The level of personnel qualification is one of the leading components of human resources of an enterprise, the development of which potential is one of its competitive advantages. The current situation requires continuity in personnel development, i.e. implementation of a number of measures that will help to unlock the individual potential of employees and contribute to the growth of their ability to contribute to the company's activities. The goal of personnel development is to increase the labor potential of employees. Virtually every person has great individual and professional potential. With the help of targeted incentives, the company gives its employees the opportunity to develop their professional skills and personal qualities to meet future challenges. Thus, a core of highly qualified personnel is formed, advanced training of employees is implemented.
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Date submitted2005-07-29
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Date accepted2005-08-27
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Date published2006-02-01
Environmental and economic mechanisms of the Kyoto Protocol
- Authors:
- V. V. Kosovtsev
The paper presents preliminary results of the search for Kyoto Protocol mechanisms. The ultimate goal of the work is to prepare an information system for the climate sector of environmental management. The purpose of the first step of the search is to obtain a description of the system of environmental mechanisms and to find out how much it corresponds to the Russian reality.
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Date submitted2005-07-30
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Date accepted2005-08-14
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Date published2006-02-01
Aggregated estimation of investment projects of oil fields development
- Authors:
- A. S. Lebedev
- A. N. Plotitsyn
The importance of integrated assessment of investment projects for oil field development is substantiated. The method of calculating the integral indicator of complex evaluation is adjusted. On the basis of this method the cost analysis of the investment program of oilfield development was carried out and the method of its implementation was proposed.
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Date submitted2005-07-01
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Date accepted2005-08-20
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Date published2006-02-01
Ways of improvement of organizational-economic mechanism of management of enterprises of coal industry
- Authors:
- O. Yu. Lebedeva
The article analyzes the current position and role of Russian coal mining companies in both domestic and global markets. Since the conditions and prospects of enterprises producing coking and steam coal are different, it is necessary to propose general directions of the companies' activities taking into account the type of products. It is possible to propose the introduction of alternative methods of accounting for overhead costs at coal mining companies. The comparative calculation of coal mining costs by traditional and alternative methods is carried out. The paper summarizes the main ways to improve the mechanism of economic controlling at coal-mining enterprises. The role of state regulation is indicated.
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Date submitted2005-07-06
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Date accepted2005-08-28
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Date published2006-02-01
Main directions of perfection of economic mechanism of reproduction of mineral raw material base at the present stage
- Authors:
- L. A. Nikolaichuk
The article reveals the economic mechanism of reproduction of mineral reserves. The main problems of the mineral resources sector are considered, the main of which is the imperfection of the legislative base. As an example, the main economic indicators of the state unitary enterprise "Petersburg complex geological expedition" are given. A number of measures to improve the efficiency of the subsoil use system in the conditions of modern market relations are proposed. The state regulation of subsoil development and use is considered as the key criterion for solving the identified problems.
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Date submitted2005-07-24
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Date accepted2005-08-19
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Date published2006-02-01
Tax accounting of the expenses connected with performance of works (rendering of services)
- Authors:
- A. S. Pchelnikova
Taxpayers applying the accrual method should be guided by the procedure for determining the amount of expenses for production and sales set out in Article 318 of the Tax Code of the Russian Federation. In practice, organizations rendering services in the sphere of services or the real sphere, when accounting for profit tax, face the problem of allocation of expenses from completed and uncompleted work. This article is devoted to the question: how the cost of unperformed work should be formed in accordance with the tax legislation. The author also proposes an alternative method which takes into account the rule that indirect expenses should be allocated in the same way (as direct expenses) for all transactions performed for more than one accounting period.
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Date submitted2005-07-12
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Date accepted2005-08-09
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Date published2006-02-01
Modeling of logistic systems of coal supply of thermal power stations
- Authors:
- A. A. Rozhkov
The article is devoted to an important problem for the region - the reliability of coal supply to thermal power plants. The solution of the problem should provide a well-established mechanism of interaction between consumers and coal producers in their close cooperation in the coal market. Much attention is paid to the development of new technological schemes of coal delivery. The author proposes to use the logistic approach, which has been recently applied in complex production and technological systems. Increasing the efficiency of coal fuel supply to RAO UES of Russia power plants is carried out on the basis of the economic and mathematical model developed by the author using a logistic system.
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Date submitted2005-07-17
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Date accepted2005-08-17
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Date published2006-02-01
Comparative estimation of accounting approaches to substantiation of expediency of formation of reserves under depreciation of financial investments
- Authors:
- V. E. Soboleva
The article is devoted to a comparative analysis of the appropriateness of provisioning for impairment of financial assets. The author tries to answer this question using a comparison of Russian and international accounting standards. The main problem includes the following questions: for which group of financial investments should a provision for impairment of financial assets be formed; when is it necessary; what are the criteria for impairment of a financial asset (investment); how to estimate the amount of the provision. To solve these problems, the author proposes several alternative methods that take into account the peculiarities of different accounting systems.
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Date submitted2005-07-18
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Date accepted2005-08-29
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Date published2006-02-01
Efficiency of Investments in Human Capital as a Condition of High Profitability of Enterprise Personnel
- Authors:
- K. P. Sushkova
The level of knowledge, skills and motivation is known as "personnel capital", or labor asset, and consists of investments. It is known that increasing the level of education and qualification leads to the growth of labor force quality and, consequently, to the growth of national income. Investment in labor assets is considered by the modern school of personnel management as the main reserve for increasing economic efficiency.
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Date submitted2005-07-11
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Date accepted2005-08-04
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Date published2006-02-01
Estimation of company value
- Authors:
- E. V. Shvareva
The paper presents the characterization of the concept of "company value". Special attention is paid to the management of this value as an integrative process aimed at qualitative improvement of strategic and operational decisions at all levels of the organization by concentrating common efforts on key value factors. The issue of natural regularities of organization transformation is considered.
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Date submitted2005-07-29
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Date accepted2005-08-20
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Date published2006-02-01
The modification of Markowitz portfolios made for stocks from the warsaw stock exchange
- Authors:
- Bartosz T. Sawik
This paper presents a method for constructing alternative constraints for the Markowitz model. Three models with modification and one standard Markowitz problem give four structures of stock portfolios with different coefficients of extreme risk aversion. The structure of the investment space of each portfolio depends on the coefficient of extreme risk aversion, the shape of the utility function for the selected investment, the ratio of stocks in the portfolio to stocks on the exchange during the selected periods, and the number of stocks. The date sets for the analysis are taken from the WSJ and refer to a planning horizon of 49 months: December 2000 to December 2004.
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Date submitted2005-07-22
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Date accepted2005-08-29
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Date published2006-02-01
The strategy of national pit coal company – consequence of restructuring Romanian mining industry in the context of Romanian adhesion to the European union
- Authors:
- Diana Cornelia Csiminga
В период создания рыночной экономики возникла необходимость организации эффективных национальных рыночных секторов, включая горную промышленность. Одним из приоритетов в развитии энергетического сектора Румынии является модернизация и повышение прибыльности угледобывающей промышленности. Представлена стратегия реструктуризации горного сектора на примере конкретной компании Национальной каменноугольной компании Петрошани.
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Date submitted2005-07-21
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Date accepted2005-08-25
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Date published2006-02-01
The elements of marketing in Polish subterranean building industry
- Authors:
- Czesław Cyrnek
- Marta Sukiennik
Utilization of free production possibilities of Polish corporations of underground construction industry, working mainly for mines, could give them a chance for functional activity outside the mining sector as well. The use of marketing elements in the 5P concept seems to be a way to achieve this goal. The issue of restructuring of the Polish mining industry has a significant impact on the underground industry. Therefore, the search for alternative ready markets for the services evidenced by these corporations should take into account marketing services that have common features of marketing activities. A comparative analysis of the investment processes carried out by technical underground construction companies and by the mines themselves shows the advantages that come with the fulfillment of duties.
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Date submitted2005-07-11
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Date accepted2005-08-09
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Date published2006-02-01
Reform directions within the Romanian mining sector
- Authors:
- Magda Dorina
Стратегический характер и режим благоприятствования позволили румынской горной промышленности оставаться в бездействии на протяжении длительного времени, несмотря на большие затраты, являвшиеся результатом ревалоризации этой отрасли национальной экономики. Реформы, начатые в 1997 г., оказались сложным и длительным процессом, который привел к возникновению изменений на уровне региональной экономики.
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Date submitted2005-07-21
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Date accepted2005-08-29
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Date published2006-02-01
The impact of restructuring in the mining industry on the labor in the jiu valley coal basin
- Authors:
- Alina Fleser
The most significant impact, determined by the reorganization directions applied, is on the human factor, since one of the conditions set for bringing the N.P.C. to profitability is a revision of the number of the company's personnel. According to some studies in the region, it can be concluded that the impact of mining reorganization on the human factor has been mainly negative. In this case, the paper proposes to identify several environmental, economic and social impacts of mining reorganization.
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Date submitted2005-07-10
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Date accepted2005-08-27
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Date published2006-02-01
Principal transformations in managerial control consequences privatisation energy system of distribution and supply electricity power of Romanian
- Authors:
- Mihaela Ghicajanu
The aspiration to join the European Union is a strategic choice for Romania, and this entails many changes in the national economy, including in the electricity and heat sectors. In recent years, there have been many changes in the legislative, institutional and operational areas of the Electricity Sector. In accordance with the provisions of the EU Community Directive 96/92 EC, the creation of the Romanian internal electricity market provides for the following measures: unbundling of generation, transmission/dispatch and distribution/supply activities; Market liberalization: open access to T&D networks, correlated with the eligibility of consumers. In this way, the introduction of competition in distribution/supply is stimulated and the supply of generation is improved.
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Date submitted2005-07-19
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Date accepted2005-08-15
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Date published2006-02-01
The implementation and optimizing of the informational systems in the company’s management
- Authors:
- Gabriela Gogoţ
- Sorin Dobîrcianu
In today's high-tech world, information in an organization is as important, if not more so, than other assets. The systems and resources that process such information are also of great importance. Any company, whether at the micro or macroeconomic level, or at the international level, cannot exist without information and the communication of that information. However, in order to obtain and communicate information, it is necessary to realize the importance of a system that not only collects data, but also processes and analyzes it.
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Date submitted2005-07-02
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Date accepted2005-08-27
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Date published2006-02-01
The use of automatic data processing/computing systems at the modern management level of the company
One of the most important developments in recent years that has had a strong impact on ADP systems is the integration of computers with communication systems. Having an integrated ADP infrastructure is one of the prerequisites for integrated organizations. Access to a company's transactional data is essential to improve its management performance, and the benefits of accessing and analyzing transactional data are obvious. Thus, the system becomes the key to a successful business, enabling management improvement by systematically monitoring results and planning new tasks.
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Date submitted2005-07-12
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Date accepted2005-08-29
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Date published2006-02-01
Smart partnership for higher education: European Mineral Masters Engineering Course
- Authors:
- Judyta Hawrysz
- Hans De Ruiter
The European Master of Mining Engineering Course (EMMEC) is a modern and attractive form of higher education at European level, targeting students from the following three disciplines: Mining Engineering, Mineral Engineering and Geotechnical/Environmental Engineering. This educational program has only recently emerged, but the university-industry network on which it is based has been established over the last nine years. Currently, nine universities located in seven European countries are directly involved in EMMEC. It is coordinated by the Federation of European Mineral Programs (FEMP), which also brings together universities from third countries and 25 companies. EMMEC has applied for recognition under the recently launched EU Erasmus Mundus program, which aims to support European Masters courses of the highest quality and increase the attractiveness of European higher education in third countries.
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Date submitted2005-07-25
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Date accepted2005-08-02
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Date published2006-02-01
Reforms in Polish mining
- Authors:
- Mariusz Kapusta
In Poland, the process of restructuring the mining industry began in 1989. Huge state centers, transferred to the following governments, were supposed to bring this sector to profitability and competitiveness on the domestic and international market. The lack of consistency in the implementation of restructuring processes has resulted in the implementation of various programs and the achievement of only parts of these reforms over the last 15 years of reforms. Reforming the mining industry is a very complex process. In this article the authors try to summarize the course of the existing rules and the perspective of the mining industry development in Poland in the coming years.
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Date submitted2005-07-26
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Date accepted2005-08-13
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Date published2006-02-01
Outsourcing and a value based management
- Authors:
- Dominik Kowal
This study identifies and evaluates strategic activities related to outsourcing in the context of company value management. The author focuses on linking the concepts of value-based management (VBM) with outsourcing in order to improve the efficiency and effectiveness of the company's operations.
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Date submitted2005-07-28
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Date accepted2005-08-28
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Date published2006-02-01
Integrated management systems (IMS) according to iso and other international management standards
- Authors:
- Lina Lau
This article is based on the author's master's thesis on integrated management systems (IMS) in accordance with international management standards. The thesis examines the requirements of different management standards in order to identify common or similar elements. For this purpose, a methodology similar to the House of Quality (HoQ) analysis is used. The motivations of organizations to establish an MIS are investigated. Finally, structural approaches to the establishment of an MIS are presented.
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Date submitted2005-07-30
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Date accepted2005-08-12
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Date published2006-02-01
The agreement between the government of the republic of Poland and the government of the Russian Federation concerning the avoidance of double taxation with respect to income and property taxes
- Authors:
- Bartłomiej Mazurkiewicz
On May 22, 1992, an agreement was signed in Moscow between the Government of the Republic of Poland and the Government of the Russian Federation for the avoidance of double taxation with respect to income and property taxes. The basis for the conclusion of this agreement was the intention of the parties to develop and strengthen business, scientific, technical and cultural cooperation between these states, as well as the intention to eliminate double taxation on income and property taxes. The article shows the main advantages of such regulation.
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Date submitted2005-07-05
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Date accepted2005-08-05
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Date published2006-02-01
Adaptative Holt’s forecasting model based on immune paradigm
- Authors:
- Tomasz Pelech
In modern management, decision making necessitates forecasting (using appropriate methods) to achieve profitable and smooth functioning of both companies and SMEs. The Holt model is a method that can be used to forecast stock exchange quotes. It is based on the values of two parameters estimating the expected value and its trend. To build a dynamic forecasting model, it is necessary to apply adaptive rules for adjusting the parameters. The paper shows the applicability of the immune paradigm on the example of Holt's adaptive model. Preliminary results of calculations using the constructed algorithm show that the immune paradigm can be considered as a promising way to improve the results (accuracy) of forecasting. They are not absolutely better than the results obtained with the classical Holt method due to a number of factors such as the length of input data, the peculiarity of the method and the design of the algorithm, which is still in the development stage.