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Date submitted2002-06-01
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Date accepted2002-07-03
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Date published2003-01-01
Optimization of open-pit mining of the Khoilinskoe barite deposit based on computer modeling
- Authors:
- I. V. Apukhtina
Volumetric model of the ore body of Khoilinskoe barite deposit was built using Micromine software, which was used as a basis for computer modeling of options for open-pit mining of the deposit. Taking into account the design parameters of the existing open pit (the height of the overburden 5 m, the height of the repayment berm 15 m, the slope of the repayment berm 50°) its volume model was built, on the basis of which the volumes of extracted rock mass, ore were estimated and the average stripping ratio was calculated (19.7). A similar model was built for the prospective variant of the open pit, for which, taking into account new data on physical and mechanical properties of rocks, it became possible to increase the slope of the pit walls to 60° and the height of the repayment benches to 30 m. Calculated by the new model overburden ratio was 14.7, which will reduce the total volume of overburden by 1493 thousand m 3 .
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Date submitted2002-06-14
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Date accepted2002-07-26
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Date published2003-01-01
Comparative analysis of the coal-bearing capacity of the Podmoskovnoye and Kamskoye basins
- Authors:
- A. V. Gazizova
Two large coal basins of the European part of Russia - Podmoskovny brown coal and Kamsky stone coal - are considered. Comparison of the structure of the coal-bearing strata of the Bobrikovsky age, petrographic characteristics of the coals contained in this strata is carried out. Conclusions on the peculiarities of conditions of coal-bearing sediments accumulation and coal transformation in these basins are made.
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Date submitted2002-06-06
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Date accepted2002-07-30
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Date published2003-01-01
Peculiarities of the Yatuli volcanism of the Girvas settlement area (Karelia)
- Authors:
- A. A. Demin
The work is a summary of geological material obtained in the summer of 2002 during the study of a new geological training ground in Karelia. The description of the stratigraphic subdivisions of the Jatulian horizon of volcanic rocks of the Girvas settlement is presented, the research on the basin depth and composition of volcanics according to the TAS diagram is given. The results obtained can be used for further detailed studies not only in Karelia and northeastern Scandinavia, but also in other areas of the globe.
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Date submitted2002-06-20
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Date accepted2002-07-13
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Date published2003-01-01
Mineralogical and geochemical features of lead-zinc ores at Pavlovskoye deposit (Novaya Zemlya archipelago)
- Authors:
- V. O. Ilichenko
Mineralogical and geochemical features of a promising polymetallic deposit on Novaya Zemlya Arch. The mineral composition of ores and their textural and structural characteristics are studied. The set of impurity elements (Ag, Cd, Ge, Ga, In, etc.) and the nature of distribution were determined. Elements of geochemical zoning have been established.
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Date submitted2002-06-20
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Date accepted2002-07-02
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Date published2003-01-01
Challenges of predicting the methane content of the Vorkuta and Donbass analogous fields
- Authors:
- V. N. Novikova
The Vorkutskoye field of the Pechora coal basin has been studied in great detail, except for the problems of methane content. The choice of the field-analogues within the limits of Donbass is limited by the following conditions: coals of stage Ж; collectors - sandstones, tops - argillites. These conditions satisfy Krasnodon and Kamensko-Gundarevsky areas of Donbass. We study the forms of methane: free, sorbed and methane in a metastable state. Are allocated micro deposits in the unloaded massif, in local curves and anticlinal folds of the strata; structural-lithological in the rocks of the coal-bearing strata and zone of cleavage of the Moshcholnaya formation; in the unloaded (exhausted) space. Geological and exploratory methods have low reliability, as a parallel and controlling method of analogy is proposed.
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Date submitted2002-06-11
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Date accepted2002-07-04
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Date published2003-01-01
Using fractal analysis to characterize the structure of the Alexandrinskoye ore deposit (Southern Urals)
- Authors:
- D. A. Petrov
A method of characterizing the structure of copper-zinc sulfide ores by means of fractal dimensionality is presented. Fractal dimensionality allows to quantify the complexity of mineral grain boundaries in ore. This information can be the basis for predicting the disintegration of ores during concentration. The material for the research was polished thin sections of copper-zinc ores from the Alexandrinsky deposit (Ural). Measurements of fractal dimensionality were carried out by the step-by-step method on a personal computer using the programs Adobe Photoshop 7.0 and FractShop. This method is used for sulfide ores for the first time.
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Date submitted2002-06-25
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Date accepted2002-07-10
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Date published2003-01-01
Geological and genetic interpretation of the results of samarium-neodymium dating of minerals of gold-tungsten deposits of the Verkhne-Yenashima ore cluster (Yenisei Ridge, Siberia)
- Authors:
- A. A. Savichev
Samarium-neodymium isotopic characteristics in minerals of gold-tungsten deposits of Olympiada, Olenye and greisen manifestation of tungsten Vysokoye-2 were studied. Isochron ages for mineralization of pre-mining quartz-wolframite-shelite, ore gold-shelite-sulfide, and post-mining fluorite-carbonate stages are 921.2 ± 7.5, 919 ± 93, and 915 ± 47 Ma, respectively. The e Nd (T) values in the minerals range from -1.3 in wolframite to -9.3 in scheelite 2 associated with gold, indicating their crustal nature. Model dating of T ( DM 2- st ) for minerals of pre-mining (1636-2053 Ma) and post-mining (1762-1806 Ma) stages correlates with the time of formation of granitogneiss domes in the region. The dating of T(VM 2- st ) for scheelite 2 (2250-2304 Ma) corresponds to the time of formation of tholeiite-basalt volcanics of the Indiglin complex, which can be considered as the primary source of gold. Gold mineralization in the interval 921-915 Ma resulted from remobilization of gold from the black shale strata and its redeposition during thermal-fluid impact during intrusion of granitoids of the Tartar-Ayakhta Complex at the 930-950 Ma.
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Date submitted2002-06-29
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Date accepted2002-07-10
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Date published2003-01-01
Results of the study of physical and mechanical properties of polymer-cement compositions with low content of dispersion medium
- Authors:
- R. R. Toib
- F. A. Zagrivnyi
- Piter L.Mvansa
The regularities of changes in physical and mechanical properties of polymer-cement composition with low content of dispersion medium have been investigated. It has been proved that the introduction of high-molecular polymer "Konkripol" into polymer-cement mortar composition allows to increase compressive and bending strength of cement stone, its adhesion to metal while maintaining the required mobility of the mixture. This contributes to improving the quality of interlayer isolation of the casing space in oil and gas wells.
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Date submitted2002-06-11
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Date accepted2002-07-18
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Date published2003-01-01
Experience in expert evaluation of facing granite
- Authors:
- A. Ya. Tutakova
Under the term ornamentality is meant a set of external properties of the rock, including its coloring and pattern. According to methodical instructions the "Scale of evaluation of decorative effect of facing granite" was made. According to this scale 10 experts-geologists estimated 20 polished samples of granite, each of which was classified as one of four classes of decorative effect. During the survey it was found that many of the parameters for assessing the decorativeness require refinement for a more unambiguous definition.
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Date submitted2002-06-26
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Date accepted2002-07-02
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Date published2003-01-01
Methodology for predicting the anthropogenic regime of groundwater during mine flooding
- Authors:
- K. N. Shcherbich
This work considers the methodology of hydrogeological forecasts of the conditions of flooding of coal mines. Relevance of the topic is determined by the mass flooding of mines in the main coal mining areas, which raises serious problems associated with the provision of environmental and industrial safety of the liquidation work. At flooding of mines the developing hydrodynamic processes have certain specificity, therefore a necessity of additional analysis and perfection of existing numerical geofiltration models has arisen. Some methodological methods used in forecasting of mine flooding conditions are stated.
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Date submitted2002-06-08
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Date accepted2002-07-14
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Date published2003-01-01
Calculation algorithm of layered massif to predict the stress state of the roof and the coal seam in the zone of mining operations
A mathematical model of interaction of a multilayer massif with a thin coal seam, including initial resolving differential equations and boundary conditions, has been obtained. The developed algorithm of numerical solution is implemented in a computational program in which the input parameters are geological characteristics of the main and immediate roof, stiffness coefficient of the coal seam in the massif and the law of its change in the edge zone, stiffness coefficient of soil rocks, stiffness coefficient of fill material, layer thickness and ultimate deformations of the roof. Accordingly, the output parameters of the calculation program are: the response of the coal seam to the action of the load from the overlying massif (support pressure), vertical and angular displacement of the roof layers over the coal seam, vertical and angular displacement of the roof over the mined-out space, the ultimate span of the roof.
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Date submitted2002-06-21
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Date accepted2002-07-05
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Date published2003-01-01
Goals and objectives of passportization of stockpiles of formed technogenic deposits
- Authors:
- E. B. Gridina
The article considers one of the most pressing problems of modern mining science - the problem of formation and development of technogenic deposits. It is known that modern technogenic deposits were formed by the method of bulk dumping, taking into account only two requirements: the minimum cost of dumping work and ensuring the stability of the slopes of the dumps. It is proved that the solution of the problem of complex use of technogenic deposits is connected not only with the possibility of increasing their consumption today, but also with the necessity of creating perspective sources of raw materials. In this connection the question of formation of technogenic deposits acquires paramount importance. The passport of the stockpile of rocks - wastes of the open pit of Kostomuksha Mining and Processing Plant is presented. The fourth main technological process of open-cast mining is proposed to be termed not as dumping, but as stockpiling.
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Date submitted2002-06-20
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Date accepted2002-07-10
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Date published2003-01-01
Assessment of the intensity of seismic blasting oscillations during mass blasts in the Kamennogorsky open pit
- Authors:
- A. A. Ivanovskii
The paper presents the results of the study of the impact of seismic blast oscillations on buildings and structures during blasting operations at the Kamennogorsk opencast colliery. Based on the results of the analysis of seismic blast vibration measurements registered by the seismic monitoring station, a forecast estimation of the intensity of seismic blast vibrations was carried out and a number of recommendations on its reduction by changing the blasting scheme and regulation of the deceleration time were given. The assessment was carried out on the basis of seismograms of mass explosions carried out during 2001.
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Date submitted2002-06-06
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Date accepted2002-07-03
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Date published2003-01-01
Reduction of dust emission from dusty surfaces of mining and smelting facilities
- Authors:
- S. A. Ilchenkova
In mining-industrial areas, the air basin is mainly polluted with dust, which has a negative impact on the natural environment. One of the powerful sources of dust emissions are dusty surfaces, on which under the influence of atmospheric conditions there are processes of dust formation. In this regard, search for rational means and ways to reduce dust emissions into the atmosphere by dusty surfaces is an urgent task. The simplest in execution is economical, efficient, environmentally friendly way of dust suppression of powerful sources - irrigation of circulating dust by water with the addition of adhesive additives.
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Date submitted2002-06-30
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Date accepted2002-07-18
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Date published2003-01-01
Specifics of the development of complex coal deposits
- Authors:
- N. V. Kosenko
The analysis of peculiarities of development of complex-structured coal deposits is carried out. One of the ways to improve the methods of separate mining of complex deposits is the use of hydraulic excavators of backhoe type. Due to their design features, these machines can excavate low-power and complex coal seams ahead of time, remove and unload the rock mass below and above the level of its standing.
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Date submitted2002-06-10
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Date accepted2002-07-21
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Date published2003-01-01
Determination of the optimal degree of crushing of blasted rock mass for crushed stone quarries
- Authors:
- E. N. Kuksa
In modern conditions of market relations, it is more and more difficult for enterprises to maintain the efficiency of production. One of the main problems is the high level of production costs due to the large output of substandard fractions. It is shown that the optimum degree of quality of blasting rock mass can be defined through profit, which depends on the crushing indicators, which in turn are the basis of quality and, therefore, prices and production costs. The interrelation of all crushing indicators is considered on the basis of the analysis of the distribution of the granulometric composition of the blasted rock mass carried out at the Olenegorsk Mining and Processing Plant. According to the results of the analysis, the dependence allowing to calculate the relationship of all crushing indicators with the average lump size is obtained.
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Date submitted2002-06-22
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Date accepted2002-07-18
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Date published2003-01-01
Determination of dimensions of artificial pillars in the ascending two-stage chamber mining system
- Authors:
- D. Yu. Minaev
In the practice of development of ore deposits of non-ferrous metals, combined development systems are increasingly used. The horizon is divided into chambers of stages I and II, which differ in the type of stowing material used. The chambers of stage I are filled with solid stowing, and the chambers of stage II are filled with loose rock. The economic performance of the development system is largely determined by the ratio of I and II stage chambers, since the costs of solid and loose rock stowing are significantly different. In this order of works, the following geomechanical situation takes place: in addition to rock pressure, which loads the pillar from the hanging wall, there is lateral pressure of loose rock deposit on the pillar, which is a retaining wall. The pressure tends to destroy, overturn or move the pillar. Thus, the purpose of this work is to determine the dimensions of monolithic pillar retaining walls in conditions of complex simultaneous loading by rock pressure and active pressure of loose rock deposit when changing technological parameters of development system. A calculation scheme for determining the dimensions of artificial pillars is made, modern methods of calculating rock pressure are described and the width of the retaining wall is calculated when changing the strength of the monolithic deposit and the dip angle of the deposit.
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Date submitted2002-06-18
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Date accepted2002-07-27
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Date published2003-01-01
"Reference" model of the psychophysiological potential of the human body in assessing the environmental and technical hazards of mines of OAO Vorkutaugol
- Authors:
- N. V. Mikhailova
A "reference" model for assessing the ecological and technical safety of a person working in the conditions of the North is proposed. In order to substantiate a complex criterion for body condition assessment a sample of the results of annual world swimming competitions was analyzed. The results were processed by 17 kinds of swimming in 14 age groups. An integral criterion of organism condition evaluation - psychophysiological potential of a person - was substantiated. A multiplicative model-based methodology for assessing the state of health of the population on the basis of the proposed criterion was developed.
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Date submitted2002-06-23
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Date accepted2002-07-21
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Date published2003-01-01
Determination of the dependence of technological parameters and intensification of the rock salt mining process
- Authors:
- S. P. Mozer
The target objectives of the development of underground salt dissolution technology were and still are to increase the productivity of wells and the completeness of extraction of the deposits' reserves. The complexity of the problems of managing the process of underground salt dissolution through the wells is unique for man-made objects volumes filled with liquid. To intensify the process of solvent saturation, taking into account the above difficulties and peculiarities, the following method is proposed. Underground salt dissolution chamber is eroded by means of buried water supply. Preliminarily on the surface the solvent is saturated with carbon dioxide in the mass ratio of carbon dioxide to solvent from 0.02:1 to 0.16:1. Non-solvent is mixed with carbon dioxide absorbent in the mass ratio of absorbent to carbon dioxide from 1.1:1 to 1.5:1 and periodically fed into the chamber. Preliminary calculation of the technological schemes of salt dissolution through wells developed by the author showed that this method allows increasing the productivity of underground dissolution chambers by 10-20 %, which indicates the prospects for further development of the proposed technologies.
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Date submitted2002-06-02
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Date accepted2002-07-24
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Date published2003-01-01
Improvement of technological schemes for mining of powerful steep and steep-sloped seams with sub-stage hydraulic extraction
- Authors:
- A. A. Sidorenko
- E. V. Glushenkov
The structure of mineral resource losses during mining of thick steep-sloped and steep seams with the use of the system of under-stage hydraulic extraction in the conditions of OAO Prokopyevskugol was determined. The influence of the main mining-geological and mining-technical factors on losses of minerals was studied. The factors that have the greatest influence on the mineral extraction coefficient were determined. It is concluded that, when determining the height of the subfloor, it is necessary to consider the width of the squeeze zone formed at the border with the mined-out space. The method of determining the parameters of the squeezing zone in the area of the influence of the mining operations is developed. The principles of designing the technological schemes of the mine workings are formulated. Recommendations on the rational arrangement of sub-stage drifts in different mining and geological conditions were developed. The economic effect from the implementation of the developed recommendations was calculated.
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Date submitted2002-06-02
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Date accepted2002-07-25
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Date published2003-01-01
Experimental studies of the effectiveness of biological treatment of oil-contaminated soils
- Authors:
- E. A. Sinkova
Surface and underground spills of oil and petroleum products often occur at many facilities, such as industrial enterprises, thermal power plants, boiler houses, transport parks, gas stations, warehouses of fuel and lubricants, etc. Environmental disturbance of soils and soil causes the necessity of spill control and reclamation of the contaminated territories. The most economically and ecologically advantageous is bioremediation at the pollution site. In this case the contaminated space is aerated through a system of filtering channels, stimulating the vital activity of autochthonous hydrocarbon-oxidizing microorganisms. In order to establish the pattern of changes in physical and chemical properties of soils and system parameters in the bacterial method of remediation, to determine the criterial dependencies and refine the design of the bioreactor the analysis of field work, samples of contaminated soil and soils was conducted, a mathematical and justified physical model of the oil pollution locus was created.
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Date submitted2002-06-30
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Date accepted2002-07-22
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Date published2003-01-01
Assessment of the impact of dust and gas clouds on the environment during blasting operations
- Authors:
- O. V. Tikhonova
The analysis of scientific and technical reports and literature on assessing the impact of dust and gas clouds on the environment during blasting is carried out. The mechanism of dust formation during blasting is considered, the factors that lead to the formation of a dust and gas cloud are listed.
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Date submitted2002-06-25
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Date accepted2002-07-04
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Date published2003-01-01
Reduction of sulfur dioxide emissions during blasting operations at pyrite mines
- Authors:
- V. I. Chernobai
One of the topical problems is considered - sulfur dioxide gas emissions during blasting operations at the pyrite deposits. All studies in this area to date have been reduced mainly to the solution of the problem of sulfide dust explosion accompanying blasting operations. It is known that an effective way to suppress explosive properties of sulfide dust is the use of special gas-dynamic blasting. However, this leads to an increase in the concentration of sulfide gas. It is proved that the solution to the problem of sulfurous gas emission is achieved by introducing an inhibiting additive into the explosive composition. In this connection, a model of the mechanism of inhibition of the combustion reaction of sulfide dust is considered. The main dependences of the influence of physical and chemical properties and inhibitor content on the sulfurous gas emission are presented. The charge design and explosive composition are proposed to reduce sulfur dioxide emission during blasting operations at colchedan deposits.
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Date submitted2002-06-05
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Date accepted2002-07-15
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Date published2003-01-01
On the issue of integrated assessment of spatial conditions of land use
- Authors:
- E. N. Bykova
Land relations are undergoing radical changes at the present stage, which is connected with the land reform. Particular attention in this area should be paid to the system of payment for the use of land, which proceeds from the need to evaluate land. The evaluation system has so far been dominated by the evaluation of land quality, i.e. its fertility and economic efficiency. With the transition to a multistructure land use the need to assess the spatial conditions of individual land uses and land plots arose. In work the retrospective analysis of a complex estimation of agricultural land use in Russia is executed, and also development of land relations at the modern stage is estimated. The spatial conditions of land use, influencing the transport factor of production, and conditions on which it depends, are allocated.
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Date submitted2002-06-07
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Date accepted2002-07-30
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Date published2003-01-01
The influence of technology on the formation of the load during the construction of the column station of the St. Petersburg Metro "Komendantsky Prospekt"
- Authors:
- P. A. Demenkov
The construction technology of subway stations significantly affects the development of the stress-strain state (SSS) of the lining-soil system. This work is aimed at revealing the nature of this influence and changes in the stress-strain state of the station column-crest complexes in the geological conditions of the St. Petersburg Metro. In-situ studies were carried out at the "Komendantsky Prospekt" station, which is under construction, during 7 months. Measurements were made with string sensors of linear deformations and a portable digital period meter. The regularities were revealed and the influence of technological processes (development of the upper vault, core, reverse vault and disassembly of temporary filling tubing) on the formation of the stress-strain state of the column-race complexes was evaluated.
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Date submitted2002-06-23
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Date accepted2002-07-17
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Date published2003-01-01
Determination of parameters of dynamic phenomena to calculate seismic resistance of underground structures
- Authors:
- O. V. Kolosova
The parameters of dynamical phenomena influencing the seismic resistance of underground structures are determined. It is shown that the main input data for determination of the vibration velocity in the massif are the maximum energy of the expected dynamic phenomenon and the distance from the excavation contour to its source. The distance from the excavation contour to the center of disturbance depends on the excavation location relatively to the zone of high seismic activity. In the zones which are really dangerous according to dynamic manifestations of rock pressure, the distance to the center of fault zone is taken with consideration of the sizes of zone of unconsolidated rocks with lowered stresses and the sizes of increased stress zone (support pressure) around the excavation. The laws of distribution of dynamic stresses around the excavation were established depending on the distance to the center of the underground drift and the energy of the rock shock. By means of the computer program TABLE CURVE 2D the hyperbolic dependence is revealed which is used for the calculation of the dynamic stresses when estimating the stability of mine workings and choosing parameters of earthquake-proof roofing for capital and preparatory mine workings of mines of the Severouralsk bauxite basin.
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Date submitted2002-06-30
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Date accepted2002-07-24
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Date published2003-01-01
Determination of pouring fluid column height when drilling deep wells in ice sediments
- Authors:
- N. S. Kononova
When drilling deep wells in thick ice deposits, significant difficulties arise in maintaining an open borehole due to the specific viscoplastic properties of ice. At present, there are many ways to fight wellbore swarming while drilling in ice. The most effective and reliable way is filling of boreholes with non-freezing pouring liquids, as the temperature of borehole walls in ice deposits is rather low: for example, ice temperature at Vostok Station (Antarctica) is up to minus 55-57°С at a depth of 20-50 m and minus 5-10°С at a depth of 3500 m and more. Filling fluids are usually formed on the basis of ecologically clean glycol mixtures and have density 0.95-0.96 g/cm 3 . The success of wells in such conditions depends on correct determination of necessary height of filling the well with filling fluid in order to avoid appearance of elastic deformations and ice creep contributing to wellbore contour floating and stoppage of drilling tool down the previously drilled part of the wellbore. Taking into account the equilibrium between lateral stress and pressure of the pouring fluid column, as well as the maximum deformation in the transverse direction, a dependence for the height of the pouring fluid column was obtained. The methodology was tested while drilling a deep borehole (total depth of more than 3620 m) at Vostok Station (Antarctica).
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Date submitted2002-06-23
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Date accepted2002-07-07
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Date published2003-01-01
Methods of creating bridge geodetic networks and their technical and economic comparison
- Authors:
- N. B. Korableva
The main methods of creating bridge geodetic networks are considered: bridge triangulation, trilateration and linear-angular networks. Their advantages and disadvantages are revealed and justified. Pre-calculations of the accuracy for each type of network were made and error ellipses were constructed. The accuracy analysis has revealed that the smallest error along the bridge crossing axis is provided by tri-lateration method, which is very essential, since in bridge construction the requirements for accuracy along the bridge axis are higher than in the crossing direction. The economical estimation of the most frequently used methods of bridge network design: triangulation and trilateration methods has been made. On the basis of the conducted research, the conclusion about the expediency of using trilateration method in production has been made.
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Date submitted2002-06-25
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Date accepted2002-07-24
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Date published2003-01-01
Development of methods of geodetic support of hydraulic structures construction on the basis of satellite technologies
- Authors:
- Mokhamed Abbud
- Zhad Yunes
The technological scheme of geodetic support for the construction of hydraulic structures intended for the safety of the runway of the airfield in Beirut (Lebanon) was developed. The basic method of geodetic measurements is accepted a satellite method in a relative mode. This method is multidimensional for the considered object of works (the method is used for the survey of the bottom relief, embankment of the dam body and laying of building blocks). Lebanese normative and technical documentation was used in the works; the planned positions of the points of the state geodetic network of Lebanon, given on the Clark ellipsoid, were defined in the UTM coordinate system. The plane rectangular coordinate system is French (x-axis points to the east, y-axis to the north).
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Date submitted2002-06-26
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Date accepted2002-07-06
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Date published2003-01-01
Regression model of mechanical drilling speed of fractured rocks
- Authors:
- Mpezo Mavambo
The mathematical model of mechanical drilling speed for fractured rocks for serial and experimental bits (bits with solid matrix and flushing channels in the body) was built. As a result of the analysis of mathematical models, methodological recommendations for drilling with pilot bits, for which the existing recommendations for drilling fractured rocks with serial (with sectoral matrix) diamond bits can be used, are proposed. In order to build a regression model of mechanical drilling rate for fractured rocks, prototype and production drill bits were made. The matrix of the pilot bit was made solid, and radial flushing channels were made in the body. The drill bits were tested at the drilling stand of the St. Petersburg Mining Institute.
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Date submitted2002-06-23
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Date accepted2002-07-21
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Date published2003-01-01
Ecological state of green spaces in Pushkin
- Authors:
- E. A. Polyakova
- V. F. Kovyazin
In 2002, we conducted additional surveys of tree species in order to identify the condition of green spaces in Pushkin. Recommendations of past surveys allowed us to reduce the rate of desiccation of native species. At the request of the gardening and park enterprise, tree species in the rest of the city were surveyed.
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Date submitted2002-06-09
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Date accepted2002-07-25
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Date published2003-01-01
Geomechanical justification of methods and means to ensure the stability of preparatory workings in zones of high rock pressure in layered massifs
- Authors:
- D. I. Raevskii
Based on the analysis of mining and geological conditions of the Eastern Donbass offered a method of determining the value of the expected displacement of the contour of preparatory workings depending on their location relative to the excavation work. The graphs of displacement of roof rocks, changes of displacements of rocks in front and behind the face depending on the different resistance of the lining are given. Considered the formation of zones of broken rocks in the vicinity of mine workings and identified ways to ensure their stability.
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Date submitted2002-06-02
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Date accepted2002-07-03
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Date published2003-01-01
Improvement of deep vertical shaft reinforcement
- Authors:
- E. P. Reznikov
The advantages and disadvantages of rigid reinforcements are discussed, the main parameters of rope reinforcements and an example of the use of cage shaft rope reinforcement are given. In addition, the design and materials of reinforcements used for sinking deep vertical shafts are listed. The areas of application of reinforcements, conditions of their expedient use in specific conditions and ways of their improvement are determined. The schemes of mutual arrangement of conductors and lifting vessels of rigid reinforcement are given.
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Date submitted2002-06-13
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Date accepted2002-07-29
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Date published2003-01-01
New vibrating inertia equipment for the processing of solid materials
- Authors:
- R. M. Babaev
- R. M. Kazakov
The considered equipment is intended both for selective opening of rocks and for disintegration of any hard, brittle materials. Selective opening of crystallites with their minimum overgrinding is achieved by applying to the bulk layer of material strictly dosed compressive forces, as a rule, of inertial nature, and simultaneously impulse vibration shear loads, causing a gradual softening of interfacial bonds. The main compressive and shear forces in these machines are created by centrifugal forces of inertia, and the material, being destroyed in the layer, is subjected to intensive vibratory impact. The principal and constructive features of vibro-inertial crushers are stated, the fields of their application are indicated, as well as new approaches to the calculation and design.
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Date submitted2002-06-01
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Date accepted2002-07-14
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Date published2003-01-01
Influence of power quality deviations on parameters and characteristics of oil refinery equipment
- Authors:
- Yu. V. Gulkov
The research of electrical power quality of electrical complex of oil refinery OOO PO Kirishinefteorgsintez was carried out. The values of distortion coefficient of sinusoidal voltage curve in the network in the spectrum of harmonics 6k± 1 (5, 7, 11, 13, 17), showing that their sources are 6-pulse frequency converters of the regulated drive. The negative impact of the higher current harmonics on the electrical consumers of the oil refinery has been determined. For normalization of electromagnetic situation and reduction of non-sinusoidal voltage are proposed: schematic measures, use of filtering devices, use of special equipment, characterized by a reduced level of generation of higher harmonics in the network.
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Date submitted2002-06-23
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Date accepted2002-07-14
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Date published2003-01-01
Single-stage hydraulic turbine for the drive of a subsea production machine
- Authors:
- A. P. Zolotukhin
A complex for extraction of minerals on the seabed and as one of its most important elements - a single-stage axial hydraulic turbine - is considered. Its mechanical characteristics and geometric parameters, which determine the location of the middle lines of the blades in space, are calculated. It has been established that at increase of hydraulic turbine diameter from 0.5 to 1.2 m capacity increases by 89 %, and efficiency value by 11 % and takes the value of 84 %. Mathematical dependences are obtained which allow to determine the average diameter of the hydraulic turbine impeller at the pre-design stage. Designs of actuators for the development of polymetallic ores on the surface of the seabed are also proposed.
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Date submitted2002-06-23
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Date accepted2002-07-27
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Date published2003-01-01
Static parameters of the combined drive of a mine electric locomotive
- Authors:
- A. A. Korzhev
The article presents a methodology for determining the main static parameters of a combined drive of a mine electric locomotive, which is a combination of a traditional propulsion system and an additional traction linear electric motor. Since the thrust force of the additional propulsor does not depend on the conditions of traction of the electric locomotive wheels with the rails, the use of such a system will increase the train mass with the electric locomotive coupling mass remaining unchanged. The basic ratios and algorithm of determining the additional propulsion power at different ways of electric motor control and different technological parameters of electric locomotive transport are given. A block diagram and a description of the algorithm for calculating static parameters of the combined drive of a mine electric locomotive for different conditions, based on limiting the traction force of the main drive by a long-term value is given.
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Date submitted2002-06-14
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Date accepted2002-07-03
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Date published2003-01-01
Estimation of energy flow losses in the gearing
- Authors:
- E. A. Kremcheev
Rotary-impact drill heads with a mechanical rotator transmission are widespread in mines and mines. A typical representative of this class of machines are BGA type units. The revealed data about breakdowns of BHA drill head show that actual lifetime of transmission elements is 60-100 hours, while the regulated lifetime is 360-1440 hours. To estimate the service life of parts and to find the weakest elements of the transmission, the energy method was chosen. When using this approach, it was necessary to consider the influence of inaccuracies in the location of transmission components on their service life. The positioning inaccuracies cause a shift in the meshing of the ring gear, and the load distribution along the width has a variable character, which leads to the reduction of the transmission life due to the occurrence of stresses in some parts of the ring gear, which exceed the allowable stresses. Thus, there was a need to take into account the non-uniformity of energy resource consumption depending on the actual contact width, nature and size of the external load. In order to solve this problem, a laboratory bench for testing the gears was created at the department. Experimental studies carried out on the stand showed that when the contact width changes by more than three times, the losses in the meshing differ little. Obviously, there is a change in the energy balance. The energy flow losses absorbed by the part and going directly to the destruction of the crystal lattice of the material increase, which leads to a more intensive expenditure of the energy resource of the gearing.
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Date submitted2002-06-02
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Date accepted2002-07-22
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Date published2003-01-01
Determining the coordinates of the location and number of electrical substations at the industrial site of the mining enterprise
- Authors:
- A. V. Krivenko
Modern problems of designing power supply systems are considered. The method of constructing load maps using the method of potential functions and the method of determining the most profitable number of power substations using the target function are shown. The results of constructing the load chart with the use of software package MathCAD 2001 are presented. The optimal number of electric power substations is determined by the given target function of expenses. The method of choosing the variant with the optimal number of electric power substations and constructing two-dimensional image of potential function of receivers loads for this variant. Recommendations on the selection of optimal locations of electrical substations and the optimal allocation of electric consumers to individual electrical substations are given. The necessity of using modern software in the design of power supply systems was substantiated.
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Date submitted2002-06-26
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Date accepted2002-07-12
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Date published2003-01-01
Gas transportation automatic control system
- Authors:
- N. Yu. Tropinova
The trunk pipeline system serves to transport gas and consists of the trunk pipeline, compressor stations, underground storage facilities and the gas distribution network. To determine the price and quantity of the supplied gas, it is necessary to measure the caloric value of the gas at the consumer. A gas quality control subsystem and a gas flow regulation circuit are being developed. The subsystem is an integral part of the ACS of the gas distribution station and consists of three main hierarchical levels. The upper level of the gas quality control subsystem is based on the SCADA system CIMPLICITY PE/HMI. A graphic interface is used for visualization of the main gas parameters, for convenience of control as well as for modification of the entered information. The middle level is built on the basis of a Modicon Micro medium-class PLC. The lower level consists of pressure, temperature, flow, humidity and chromatograph sensors.
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Date submitted2002-06-04
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Date accepted2002-07-24
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Date published2003-01-01
Study of the possibility of controlling the temperature of the caissoned belt of the Vanyukov furnace
- Authors:
- E. A. Alsufev
The possibilities of controlling the temperature of the caisson belt of Vanyukov furnace are studied. The process of heat transfer through the multilayer furnace wall and the process of heat transfer from the caisson to the cooling water are considered. Based on the results of calculations and literature data, the relationship between the temperature of the caissoned furnace belt and changes in the temperature of water supplied for caisson cooling is established.
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Date submitted2002-06-02
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Date accepted2002-07-25
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Date published2003-01-01
Ways to intensify the grinding process in cylindrical mills with steel grinding media
- Authors:
- A. M. Vasilev
The main world trends of intensification of the grinding process in ball mills are analyzed. The choice of optimal ball load, illustrated designs of new mills, mill linings are considered.
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Date submitted2002-06-25
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Date accepted2002-07-20
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Date published2003-01-01
Enhancement of ore dressing processes for copper-nickel ores
- Authors:
- M. E. Golovanov
- S. V. Dmitriev
The granulometric characteristics of the crushing - classification products were analyzed on the basis of the factory testing of the crushing cycle of the Pechenganickel concentrator. On the basis of this analysis and mathematical models of apparatuses the technological process of grinding with the purpose of its optimization is investigated. A number of recommendations on optimization of grinding and classifying equipment operation were elaborated, proposals on reconstruction of the grinding - classification cycle were developed, operation charts for the grinding process with regard to productivity growth were created.
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Date submitted2002-06-02
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Date accepted2002-07-27
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Date published2003-01-01
Experience of using predictive computer packages at enrichment plants
- Authors:
- E. V. Golovin
- M. V. Lamtev
Presented are various optimization computer packages needed by research engineers and technologists as a tool for process studies, as well as design engineers who need accurate models to investigate various design scheme options.
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Date submitted2002-06-23
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Date accepted2002-07-15
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Date published2003-01-01
Determination of optimal parameters of slurry dewatering process on FPAKM type press filters
- Authors:
- V. O. Golubev
Statistical processing of experimental data on filterability of slurries of a number of metallurgical enterprises in the CIS on filters of FPACM ( Larox PF ) type was carried out. Regression dependences of residual moisture content and volume of collected filtrate on characteristics of initial pulp and parameters of dewatering process for copper and zinc concentrates were obtained. The efficiency of pulp dewatering process at press filters is estimated and the ways of its further improvement are indicated. Optimal parameters of the combined filtration process for a number of hydrometallurgical pulps are determined and recommendations for improvement of its technical and economic efficiency are given.
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Date submitted2002-06-20
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Date accepted2002-07-20
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Date published2003-01-01
Study of acid-base interaction of seed surface with aluminate solution
- Authors:
- V. I. Davydov
Currently, aluminum smelters require alumina of higher quality in terms of physical properties, so many studies are aimed at obtaining sand alumina. The method of obtaining sand alumina proposed by the St. Petersburg Mining Institute is considered. The influence of seed coarseness on the formation of productive alumina is considered. The influence of seed coarseness in the Bayer method and in the method of sintering with carbonization of aluminum hydroxide is studied. The proposed method of alumina production is at the stage of scientific research, so the introduction into the technology is not yet discussed.
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Date submitted2002-06-01
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Date accepted2002-07-27
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Date published2003-01-01
Calculation of thermodynamic probability of reactions in the system manganese - phosphorus - sulfur
- Authors:
- A. A. Darin
The basic methods of hydrometallurgical processing of ferromanganese nodules are considered: leaching with pre-sulfation roasting and sulfuric acid leaching. The conclusion about the applicability of both methods for processing of phosphorus-containing ferromanganese nodules has been made on the basis of calculation of thermodynamics of characteristic chemical reactions. Calculated interaction energies in the systems Mn-S-O and Mn-P-S at different temperatures are given.
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Date submitted2002-06-05
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Date accepted2002-07-13
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Date published2003-01-01
Study of sorption of Fe2+ cations on ferromanganese nodules
- Authors:
- M. Yu. Ionova
This work is focused on one of the important problems of many metallurgical industries: wastewater treatment from heavy metals, in particular, from effluents containing soluble forms of iron. Most often for this purpose various imported expensive sorbents with ion-exchange function are used. The purpose of this work was to compare the sorption characteristics of already known and used in filtration processes inorganic sorbents and new mineral raw materials - iron-manganese nodules. The results of the experiment showed that the sorption capacity of nodules can be compared with that of crushed concentrates of pyrolusite. Thus, it is possible to recommend ferromanganese nodules for use instead of already known and used in filtration processes inorganic sorbents for water purification from iron (2+).
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Date submitted2002-06-21
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Date accepted2002-07-15
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Date published2003-01-01
Development of a mathematical model of the process of electric melting of briquetted raw materials
- Authors:
- E. V. Kalyukina
Due to the transition to smelting of unburnt briquetted flotation concentrate in ore-thermal furnaces of Pechenganickel smelting shop (JSC "Kola MMC") it seems reasonable to determine the optimal conditions of electric smelting technology. The mathematical models of smelting technology and shop technology as a whole have been developed and a computer program for their solution has been created, a comparative analysis of technology indicators using existing and new raw materials has been carried out.
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Date submitted2002-06-29
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Date accepted2002-07-03
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Date published2003-01-01
Disposal of intermediate products of scandium and its ligatures
- Authors:
- D. V. Kutsenko
Metallic scandium and its ligatures are widely used in various products of science-intensive technologies. Scandium is one of the rare and expensive metals, which necessitates the complex use of its intermediate products. The main types of wastes produced during the metallothermal production of crystalline scandium and its ligatures are considered. The regularities of scandium transition into solid and liquid phases of intermediate products during recycling are determined. Based on the obtained scandium-containing materials, Al - Mg - Sc ligatures have been synthesized, which allows to carry out the technological process in a closed cycle with minimal losses of valuable components.
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Date submitted2002-06-19
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Date accepted2002-07-30
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Date published2003-01-01
New methods of computer calculations of material balances at enrichment plants
- Authors:
- M. S. Molodtsev
- A. M. Arustamyan
Three variants of computer balancing calculations of masses, based both on classical methods of the solution of systems of balance equations, the number of which should be equal to the number of determined indicators (usually according to the general sampling data), and on a new method, using the fractional composition of raw materials and separation characteristics of flotation operations, are investigated. The latter method allows calculations based on the minimum number of data (usually based on current sampling data).
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Date submitted2002-06-11
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Date accepted2002-07-21
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Date published2003-01-01
Visualization of the technological parameters of the aluminum electrolysis process
- Authors:
- N. N. Pashkina
Visualization of the technological process of aluminum electrolysis in SCADA-system CIMPLICITY is considered, the main screen forms of electrolysis and their interconnection are presented. The upper level of ACS represents an automated workplace of the operator of the control system of the electrolyzer series, which includes 23 apparatuses. The process visualization project has a structure with basic functions of data exchange with controllers, functions of logging, statistical analysis, operational calculations, including possibilities to influence control actions formed by output channels of the system.
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Date submitted2002-06-27
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Date accepted2002-07-16
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Date published2003-01-01
Equilibrium recrystallization of aluminum hydroxide
- Authors:
- A. V. Starshinov
- A. V. Tsybizov
Materials on recrystallization of synthetic gibbsite are presented. A theoretical substantiation of equilibrium recrystallization based on the difference in solubility of macro- and micro-particles is given. Experimental data confirming the theoretical justification are presented.
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Date submitted2002-06-12
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Date accepted2002-07-15
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Date published2003-01-01
Optimization of the technological mode of decomposition of aluminate solutions
- Authors:
- A. V. Tsybizov
- A. V. Starshinov
The methodology of stage-by-stage optimization of aluminate solutions decomposition is substantiated and described. Experimental materials and their mathematical processing in the form of regression equations are presented. The choice of the optimal technological regime according to the indicators of A1 2 0 3 -ZN 2 0 yield, fractional composition and CO2 content has been carried out.
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Date submitted2002-06-09
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Date accepted2002-07-26
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Date published2003-01-01
Information field of operational cost controlling of research and development of geological profile
The format of the controlling information base for FSUNPP " Geologorazvedka was developed. The information base is represented by a system of tables that includes blocks of initial information, calculated information and calculated-analytical information. The initial information block contains data of information-sampling nature. The block of calculated information is based on the tables of initial information and registers the procedures of aggregation and differentiation of labor costs, production costs and the cost of R&D. The calculation and analytical block provides the final results on the evaluation of labor costs and production costs.
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Date submitted2002-06-07
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Date accepted2002-07-23
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Date published2003-01-01
Improving the methodology of diagnosing the bankruptcy of fuel and energy companies
- Authors:
- M. N. Vakhnina
In an unstable economy the identification of the threat of bankruptcy of enterprises becomes essential. The criterial approach, which has been approved in Russia at present, to assess the unsatisfactory structure of an enterprise's balance sheet, however, is not without its shortcomings. In the absence of one universal methodology for predicting bankruptcy there is a need to choose and adjust the methodology according to the specific industry in which the organization operates. For companies in the fuel and energy sector the assessment of the probability of bankruptcy can be based on such indicators as the financial stability ratio, current (total) liquidity, the bankruptcy prediction ratio, E. Altman's creditworthiness index. The latter should be calculated according to the formula adapted to Russian conditions. Besides, in order to make the task easier, it is suggested to refer the enterprise to one of classes of credit solvency. The application of a comprehensive methodology will increase the reliability of the results obtained.
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Date submitted2002-06-10
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Date accepted2002-07-10
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Date published2003-01-01
The application of the balanced scorecard in the mining enterprise
- Authors:
- V. V. Vinogradova
The work is devoted to the study of the possibility of implementing the Balanced Scorecard system (balanced scorecard system) in a mining enterprise. In the system of indicators (including non-financial), characterizing various areas of activity of the enterprise, it is proposed to include as a key indicator of the financial potential component - the economic value added. The relevance of the introduction of non-financial indicators in the system of assessing the effectiveness of the enterprise to achieve its strategic objectives, including maximizing the value.
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Date submitted2002-06-25
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Date accepted2002-07-07
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Date published2003-01-01
Influence of changes in the Tax Code of the Russian Federation on the financial results of mineral complex enterprises of the Russian Federation
- Authors:
- R. A. Gavrilova
The analysis of changes in the Tax Code of the Russian Federation and their influence on the financial result of the activity of the enterprise is carried out. First of all, attention is paid to the tax on profit of organizations and the tax on extraction of mineral resources. The objects of taxation, taxable base, tax rates and benefits are defined. In an attempt to determine how the changes in the Tax Code will affect the overall tax burden of enterprises, we used normative documents, as well as the opinions of some experts.
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Date submitted2002-06-07
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Date accepted2002-07-07
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Date published2003-01-01
Assessment of the prospects for sustainable development of the Kingisepp Mining and Industrial Complex
- Authors:
- N. G. Guseva
The prospects of sustainable development of the Kingisepp Mining and Industrial Complex, the functioning of which has a significant impact on the development of the economy of Kingisepp district and the Leningrad region, are associated with both the development of existing enterprises and the creation of new ones focused on the involvement of local resources, including minerals, in production. One possible way to solve the problems of sustainable development of the district is the development of the Phosphorit industrial zone. As one of the organizational and technical solutions to improve the efficiency of OAO Phosphorit, the production of emulsion explosives at the enterprise is proposed.
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Date submitted2002-06-19
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Date accepted2002-07-14
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Date published2003-01-01
Improvement of planning at mining enterprises under market conditions
- Authors:
- A. A. Druzhinskaya
The problem of planning at enterprises in modern conditions is considered. To solve this problem, it is proposed to use the latest concept of strategic management (controlling), which is successfully implemented at the enterprise using the system of budget planning. The system of budget planning (budgeting) is the most effective system of planning in terms of market relations, the use of which at the enterprises allows to achieve the desired end result. The efficiency of the budgeting system implementation is confirmed by the experience of budgeting system implementation at mining enterprises, in particular, at OAO Kola MMC.
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Date submitted2002-06-11
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Date accepted2002-07-16
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Date published2003-01-01
Analysis of the system of state administration of subsoil use in the Russian Federation
- Authors:
- L. I. Iseeva
- A. V. Zelenov
The analysis of the system of state regulation of relations between the state and economic subjects (enterprises, organizations, institutions) of subsoil use is offered. The powers of the Ministry of Natural Resources of the Russian Federation, which conducts the state policy and manages the study, use, reproduction, protection of natural resources, environmental protection and environmental safety are considered. The structure of state regulation of relations of subsoil use is given. Possible variants of the concept of reforming the legislation on subsoils are analyzed.
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Date submitted2002-06-01
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Date accepted2002-07-07
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Date published2003-01-01
Methodological basis for operational controlling of R&D
- Authors:
- E. G. Katysheva
The production function of a research and production enterprise (RPE) is to generate and maximize profits, ensuring the efficiency of investment in R&D. The efficiency of investment is determined by the level of costs for project development. The problem of cost optimization can be solved by controlling. Depending on character of the purposes of the enterprise and planning horizon, strategic and operational controlling is allocated. For NPP the most significant is the system of operational controlling, allowing to manage costs at the level of structural divisions of the enterprise and developed projects. Controlling, aimed at self-regulation and self-organization of production, will ensure functioning of controlling system on the basis of continuous analysis of production and economic activity; optimization of production function in the format of operative information base. The controlling system at the NPP contributes to the optimization of the price level of scientific and technical products on the basis of continuous regulation of labor and production costs.
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Date submitted2002-06-30
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Date accepted2002-07-18
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Date published2003-01-01
Legal aspects of the rotational method of production organization
- Authors:
- D. R. Kayumov
- L. S. Sinkov
The legal peculiarity of the rotational method as a special form of work organization consists in the specific for labor legislation provision of conditions of labor and rest mode of employees. The rotational method is a non-traditional way of organizing production, and until now there is a discussion about the economic feasibility of such a specific labor regime, especially for the enterprises of the mining complex in Russia. The relevance of this topic is associated with the presence of conflicts in labor legislation on the issue of implementation of the norms of current legislation in the rotational method.
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Date submitted2002-06-26
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Date accepted2002-07-10
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Date published2003-01-01
Assessment of investment risk in the oil industry when designing the development of oil fields of poorly explored areas
- Authors:
- M. A. Lazarenko
The economic efficiency of the project when implementing investments in the extractive industries is significantly affected by geological risk, which is part of the non-systemic risk. When assessing the object, it seems the most adequate to define the geological risk as the probability that the real geological resources or reserves will be below the expected level. Considering that in the structure of the explored reserves the greater part is taken by Ci and C2 categories reserves (more than 60 %), and also a high error of the reserves confirmation and the high level of the geological risk connected with it, it is desirable to have the technology, allowing to make a fast reassessment of the reserves in case of any parameter change taking into account probabilistic nature of its value. The set of technologies considered in this work allows to analyze any series of geological models of an object or license area with any variations of calculation parameters.
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Date submitted2002-06-12
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Date accepted2002-07-24
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Date published2003-01-01
Peculiarities of geological service in foreign countries
- Authors:
- N. V. Pashkevich
- E. L. Solodkov
The issues of organization of exploration in the world are considered. The features of their financing in developed and developing countries are shown. For developed countries, conducting geological exploration at their own expense, the composition of the subjects of subsoil use, engaged in these works, as well as the structure of the state geological service is analyzed. Attention is paid to the methods of stimulation used by the state to attract private capital. Developing countries, seeking to strengthen their positions in the structure of the world's mining business, have begun to reform the legislation, which aims to attract foreign investors to the mining sector of the economy of these countries. Recommendations on the use of accumulated world experience for improvement of Russian legislation are given.
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Date submitted2002-06-10
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Date accepted2002-07-02
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Date published2003-01-01
Challenges of increasing the efficiency of OAO Vorgashorskaya Mine
- Authors:
- D. A. Savinov
The article considers the problems relevant to OAO Vorgashorskaya Mine: the current state of the main mining equipment, the efficiency of the use of labor resources and funds for remuneration of labor, sales markets. The ongoing process of merging the two largest enterprises of the Vorkuta industrial district - OAO Vorkutaugol and OAO Vorgashorskaya Mine - is beneficial for both parties. The first enterprise needs to diversify its consumer base. The second enterprise can increase sales of coal products at the expense of the use of developed markets of the first one. The necessity of using the competitive advantages of OAO Vorgashorskaya Mine as a basis for increasing the volume of production aimed at new markets is shown. Attention is paid to a set of measures to improve the financial stability of the mine and the efficiency of production and sales of coal products.
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Date submitted2002-06-13
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Date accepted2002-07-25
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Date published2003-01-01
Problems and prospects for Gazprom's development in the context of the formation of the Pan-European gas market
- Authors:
- A. E. Savchenko
The article presents the results of the study of the current state and prospects of development of the European gas market in connection with the economic assessment of Severgazprom pipeline system development project. The relevance of the study is predetermined by the ever-increasing role of Severgazprom transport infrastructure in natural gas exports to Europe, as well as the integration processes within the Russian and Pan-European gas systems. The analysis of the problems and prospects of formation and development of the Pan-European gas market and the current state of the gas market in Europe, its structure, basic principles and nature of functioning allowed to identify the main factors for increasing the competitiveness of the Russian gas industry in the European market and the main trends of its development.
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Date submitted2002-06-04
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Date accepted2002-07-28
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Date published2003-01-01
Assessment of environmental and conflict competitive risk in the diamond mining industry
- Authors:
- A. V. Smetankin
The article offers a methodology for assessing the unique competitive risks of the diamond mining industry: the environmental competitive risk and the competitive conflict risk. These risks become especially relevant for diamond mining companies operating in the conditions of intensified competition on the global diamond market, more complicated global military and political situation associated with armed conflicts and terrorist acts, deterioration of environmental parameters and increased consumer attention to the environmental quality of products. The proposed methodology is based on an indirect statistical-probabilistic method of calculating the estimated risk, the nature and complexity of which do not allow applying a direct calculation. The risk indicators obtained are different for individual national jewelry markets and for different diamond mining companies.
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Date submitted2002-06-12
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Date accepted2002-07-05
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Date published2003-01-01
Socio-economic and environmental challenges of the development of the coal industry in Russia
- Authors:
- E. A. Soloveva
- O. Yu. Lebedeva
The economic, social and environmental issues of the coal industry at the present stage are considered. The economic analysis of the state of coal mining enterprises on the example of OAO Gukovugol - one of the largest anthracite enterprises in Eastern Donbass. The special attention is given to the questions of environmental protection and environmental activity of the association, the level of the negative effect of the enterprises of OAO Gukovugol on the environment, the necessary expenses for environmental measures, the volume and structure of the resource payments are determined. The tasks were formulated, fulfillment of which will contribute to increase of coal competitiveness in the energy market.
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Date submitted2002-06-18
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Date accepted2002-07-30
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Date published2003-01-01
Analysis and possible solutions to modern problems of subsoil use
- Authors:
- A. M. Shkurko
- L. A. Nikolaichuk
Among the main problems of subsoil use in Russia at the present time are the drop in production volumes and the reduction of geological exploration works. Insufficient financing of the regions, reduction of opportunities and interest of large mining companies to carry out exploration works make it urgent to increase efficiency of methods of state stimulation and improvement of legislation in order to strengthen the rent principle in taxation and attract small enterprises and foreign investors to the mining business.
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Date submitted2002-06-24
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Date accepted2002-07-14
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Date published2003-01-01
Development of a software package "test control of students' knowledge."
- Authors:
- M. A. Arbuzov
Nowadays, test control of knowledge is becoming more and more attractive and widespread. This control allows you to both simplify the process of assessing knowledge, and increase the objectivity of this assessment by eliminating the factor of subjectivity. Not without reason, even higher education institutions are beginning to move to the test method of taking exams and tests. The work is devoted to developing a software package for the preparation and conduct of knowledge testing. The complex includes the program TestMaker for preparing tests and the program TestViewer to conduct them. The programs are made in the programming environment Borland Delphi 6.0. The tests confirmed the performance of the complex and its suitability for practical use.
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Date submitted2002-06-03
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Date accepted2002-07-11
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Date published2003-01-01
Mathematical modeling of mineral value isoline during open-pit mining of complex ore deposits
- Authors:
- M. P. Bukasa
The purpose of this work is to find the analytical equation of the isoline value of minerals in the open mining of complex ore deposits. As the initial data, we used the data of the cross section of a complex deposit, where three types of minerals (main and two associated) are developed. In the Cartesian rectangular coordinate system are given coordinates of points that allow to build an approximation of the desired equation. The example of application of the method of least squares for construction of the specified dependence is considered. This algorithm is implemented in a computer program based on Microsoft Excel. Numerical results were obtained and graphs were plotted.
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Date submitted2002-06-02
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Date accepted2002-07-10
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Date published2003-01-01
Language of facial expressions and gestures
- Authors:
- M. A. Vasilkina
Most human communication is done through gestures, observing the distance between people. Most researchers have concluded that verbal modes are used to convey factual information, while non-verbal modes convey a person's feelings and emotions. When we say that a person is receptive or has intuition, we are referring to their ability to understand the nonverbal cues of others and compare them to verbal ones. When we say that we sense lies in the words of the interlocutor, we actually find a discrepancy between the words spoken and the facial expressions, gestures. The source base for this study was various books on rhetoric and speech culture.
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Date submitted2002-06-01
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Date accepted2002-07-20
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Date published2003-01-01
Geologist Sobolev and the discovery of diamond deposits in Yakutia
- Authors:
- Yu. S. Gurev
For the anniversary of the Department of Geology and Exploration of Mineral Deposits a presentation was prepared about the activity of the geologist V.S. Sobolev and his main work - prediction of a diamond deposit in Yakutia, carried out on the basis of comparison of the geological structure of diamond-bearing provinces of South Africa and Western Siberia. This can serve as a vivid example of successful use of mathematical model in geology. Material about the life and work of a scientist is combined with a story about mathematical models and the most common example of the use of a mathematical model (the discovery of the planet Neptune) most expressively reproduced in the program PowerPoint. The material is organized on 13 slides, which run automatically, so it looks like a movie. The presentation is accompanied by audio and video and lasts 8 minutes.
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Date submitted2002-06-29
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Date accepted2002-07-07
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Date published2003-01-01
On the origins and formation of administrative justice in Russia
- Authors:
- D. R. Kayumov
Relevance of studying the formation and development of the institute of administrative justice in Russia is associated with the problems of direct action of constitutional norms relating to administrative legal proceedings. A brief historical overview of the stages of development of this institute is given. The need for clear regulation of legal relations in the field of administrative justice is shown. Administrative justice can function effectively only if there is a sufficiently developed legal system. The formation of Russia's legal system also requires the creation of bodies of administrative legal proceedings. Currently, the bill "On Administrative Courts in the Russian Federation" is being widely discussed.
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Date submitted2002-06-20
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Date accepted2002-07-04
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Date published2003-01-01
Taimyr District Center for Folk Art
- Authors:
- V. Yu. Paniot
An analysis of the activities carried out by the Taymyr District Center of Folk Art (TDCNT) to support traditional culture and art of the indigenous inhabitants of the Taymyr (Dolgano-Nenets) AO is offered. Siberia and the Far East is a multinational region. The Taimyr Autonomous Okrug is situated on this territory. The culture of the peoples living in the area is rich and diverse. The people of the district are mainly Dolgans, Nenets, Enets, Nganasans, Evenks. The Taymyr District Center of Folk Art supports, preserves and develops traditional culture and art of peoples of the North.
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Date submitted2002-06-11
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Date accepted2002-07-30
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Date published2003-01-01
The Art of the Blade - the Call of Freedom
- Authors:
- A. P. Simakov
An attempt is made to consider the problem of spiritual freedom through a particular symbol - edged weapons. Information is given about the main schools of the blade, internal training of a warrior. As one of the modern manifestations of the art of the blade the film "Crouching tiger, lurking dragon" is analyzed. Its main characters show the difference between a true master, who has learned harmony, and a fighter who did not devote enough time to internal training. The philosophical conclusions of the Wudang school can still facilitate some decisive choices for man today. The eternal truths help us to find peace within ourselves and to reconcile with the world around us.
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Date submitted2002-06-28
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Date accepted2002-07-17
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Date published2003-01-01
Creating an electronic guide to the Pascal programming language
- Authors:
- A. M. Smirnov
Computers are used rather lopsidedly in the general education process. Creation of electronic analogues of existing lecture courses, tutorials for laboratory and coursework increases the efficiency of independent work, partially replaces reference books, will be in demand by distance learning students. The Electronic Guide has been created with the help of Hypertext (HTML) language. The choice of this tool predetermined the possibility of work without knowledge of special programming techniques, accessibility of browsing, compact material for saving. For the first experience of electronic guide creation subject "Computer science" has been chosen, in particular, course material "Basic computational processes and their implementation in Pascal programming language" (one semester) for the 080100 specialty "Geological survey, prospecting and exploration of mineral deposits". The electronic guide is recorded on computers in the classrooms of the Mining Institute where the classes are held and is used for laboratory and term papers. The work of the guide is provided with a soundtrack different for each topic. The guide, which contains a whole semester's worth of lectures, is placed on a single floppy disk.
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Date submitted2002-06-17
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Date accepted2002-07-23
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Date published2003-01-01
Faculty of Mining and Electrical Engineering. History of formation and current state
- Authors:
- A. S. Fokin
Information is presented about the milestones of the establishment and reforms of the Faculty of Mining and Mechanical, and later of the Faculty of Mining and Electrical Engineering. With the establishment of the Mining School in 1773 seven classes were opened there, including mechanical and drawing. The first subjects, taught in the College, were mine mechanics, theoretical mechanics and hydraulics. The faculty of Mining mechanics as an independent structural unit was founded in the autumn of 1919. Its appearance was connected with the necessity to train specialists in mining engineering, special equipment for mines, dressing mills and mining plants. It was the first in the country mining mechanical faculty. The glory of the faculty consisted of famous scientists A.P. Herman, F.N. Shklarsky, L.B. Levenson, V.V. Chernyavsky, A.A. Shchukin, V.I. Gerontiev. The team of teachers, researchers and graduate students aims at closer cooperation with various mining enterprises and companies, which will undoubtedly have a positive impact on improving the quality of training.