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Geotechnical Engineering and Engineering Geology
  • Date submitted
    2024-05-28
  • Date accepted
    2024-11-07
  • Date published
    2024-12-25

Methods of intensification of pipeline transportation of hydraulic mixtures when backfilling mined-out spaces

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The paper presents an analysis of the advantages and limitations of additional measures to intensify the transportation of the backfill hydraulic mixture flow. The results of the analysis of the conditions for using pumping equipment to move flows with different rheological properties are shown. Generalizations of the methods for influencing the internal resistance of backfill hydraulic mixtures by means of mechanical activation, as well as increasing fluidity due to the use of chemical additives are given. The article presents the results of studies confirming the feasibility of using pipes with polymer lining, which has proven its efficiency in pumping flows of hydraulic mixtures with different filler concentrations. An analytical model of hydraulic mixture movement in the pipeline of the stowage complex has been developed. The trends in pressure change required to ensure the movement of hydraulic mixture in pipelines of different diameters are exponential, provided that the flow properties are constant. The effect of particle size on the motion mode of the formed heterogeneous flow, as well as on the distribution of flow density over the cross-section, characterizing the stratification and change in the rheological properties of the backfill hydraulic mixture, is assessed. An analytical model of centralized migration of the dispersed phase of the hydraulic mixture flow is formulated, describing the effect of turbulent mixing of the flow on the behavior of solid particles. An assessment of the secondary dispersion of the solid fraction of the hydraulic mixture, which causes a change in the consistency of the flow, was performed. The studies of the influence of the coefficient of consistency of the flow revealed that overgrinding of the fractions of the filler of the hydraulic mixture contributes to an increase in the required pressure in the pipeline system.

How to cite: Vasilyeva M.A., Golik V.I., Zelentsova A.A. Methods of intensification of pipeline transportation of hydraulic mixtures when backfilling mined-out spaces // Journal of Mining Institute. 2024. p. EDN TJNVLR
Geotechnical Engineering and Engineering Geology
  • Date submitted
    2024-04-22
  • Date accepted
    2024-06-13
  • Date published
    2024-07-04

Lithification of leachate from municipal solid waste landfills with blast furnace slag

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The article presents an alternative method of utilization of blast furnace slag and leachate from solid municipal waste landfills, the formation of which occurs during the infiltration of atmospheric precipitation through the thickness of deposited waste. The method is based on the conversion of leachate from the liquid phase to the solid aggregate state by lithification using blast furnace slag as an astringent material. The hydraulic activity of slag, which depends on the amount of oxides contained in it, has been estimated. The investigated slag belongs to the 3rd grade, which confirms the possibility of its use as an astringent material. The filtrate was analyzed for the content of various elements, and the maximum permissible concentrations for each element were found to be exceeded. Chemical and biological oxygen demand were determined, and critically high values were installed (17200 mgO2/l and 4750 mgO2/l, respectively). The lithification process was divided into two stages. The first stage was to reduce the organic component in the filtrate using a coagulant, aluminum sulfate; the second stage was slag hydration. The optimum ratio of lithificate components in terms of mixture solidification rate was established at 1:0.03:1.25 (leachate, coagulant, blast furnace slag). The obtained material was analyzed for the solubility and content of various forms of metal. It is established that at infiltration of atmospheric precipitations through lithificate only 3 % of material will be washed out; concentrations of gross and mobile forms of heavy metals do not exceed the maximum permissible, except for the gross content of arsenic, mobile, and water-soluble forms of which were not found. The values of chemical (687 mgO2/l) and biological (173 mgO2/l) oxygen demand in the aqueous extract from lithificate decreased more than 25 times in comparison with the initial filtrate. According to the results of toxicological studies, lithificate was assigned an IV class of waste hazard, which confirms the possibility of its use as bulk material at landfills.

How to cite: Pashkevich M.A., Kulikova Y.A. Lithification of leachate from municipal solid waste landfills with blast furnace slag // Journal of Mining Institute. 2024. Vol. 267. p. 477-487. EDN CSHCSM
Geotechnical Engineering and Engineering Geology
  • Date submitted
    2024-04-22
  • Date accepted
    2024-06-13
  • Date published
    2024-07-04

Comprehensive utilization of urban wastewater sludge with production of technogenic soil

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The article presents the analysis of the existing approach to wastewater sludge treatment and justifies the selection of the most promising management technology that allows maximum use of wastewater sludge resource po-tential. To obtain a useful product (biocompost) suitable for use as part of technogenic soil, experimental studies of aerobic stabilization of organic matter of dehydrated urban wastewater sludge with the addition of other waste by using passive composting technology were carried out. The technology is included in the list of best available technologies (BAT). The selection of the most optimal components for the mixture was based on the results of determining the C and N content, humidity and pH of the components used that ensured the composting of organic waste. The results of laboratory studies of the obtained biocompost according to the main agrochemical and sanitary-epidemiological indicators are presented. Testing was carried out according to the criterion of toxicity of the biocompost’s aqueous extract. The assessment of the technogenic soil was performed when using biocompost in its composition for compliance with existing hygienic requirements for soil quality in the Russian Federation. Based on the results of the vegetation experiment, optimal formulations of the technogenic soil were determined, i.e., the ratio of biocompost and sand, under which the most favorable conditions for plant growth are observed according to a combination of factors such as the number of germinated seeds, the maximum height of plants and the amount of biomass. The conducted research makes it possible to increase the proportion of recycled urban wastewater sludge in the future to obtain soils characterized by a high degree of nutrient availability for plants and potentially suitable for use in landscaping, the biological stage of reclamation of technogenically disturbed lands, as well as for growing herbaceous plants in open and protected soil.

How to cite: Bykova M.V., Malyukhin D.M., Nagornov D.O., Duka A.A. Comprehensive utilization of urban wastewater sludge with production of technogenic soil // Journal of Mining Institute. 2024. Vol. 267. p. 453-465. EDN IAYJKS
Energy industry
  • Date submitted
    2023-03-14
  • Date accepted
    2023-06-20
  • Date published
    2023-07-19

A reliability study of the traction drive system in haul trucks based on failure analysis of their functional parts

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The efficiency of a mining and processing plant depends on the level of complex mechanization of the production process. In mineral extraction, haulage is a major cost category, with haul trucks being the key component of the mining transportation system. To improve production performance, mining operations can increase their haulage turnover and reduce transportation costs, which necessitates making haul trucks more reliable. This can be done by improving their mean time to first failure (MTFF) indicators. This article analyzes the reliability status of the traction drive system inhaul trucks operating in the mineral resources sector. It provides a quantitative assessment of traction drive system failures resulting from part defects and discusses the associated repair costs. By examining failure data from 2018 to 2022 and the results of vibration tests performed on a diesel generator, the study reveals that the most expensive failures are associated with defects in the synchronous generator, which are primarily caused by elevated external vibrations. Based on basic vibration tests and vibration spectra tests at different operating modes, recommendations have been formulated concerning the generator’s robustness to external mechanical forces and the ways to increase the generator’s protection grade to prevent dust intrusion. The study also identifies the frequency range that poses the greatest risk of damage to the windings.

How to cite: Nazarychev A.N., Dyachenok G.V., Sychev Y.A. A reliability study of the traction drive system in haul trucks based on failure analysis of their functional parts // Journal of Mining Institute. 2023. Vol. 261. p. 363-373. EDN HCLPJB
Geotechnical Engineering and Engineering Geology
  • Date submitted
    2022-10-31
  • Date accepted
    2023-03-02
  • Date published
    2023-12-25

Lightweight ash-based concrete production as a promising way of technogenic product utilization (on the example of sewage treatment waste)

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The study is devoted to the development of a method for the technogenic raw materials utilization. Special attention is paid to the prospect of involving products based on them in the production of new building materials. The results of Russian and foreign studies on the reuse of wastes, such as phosphogypsum, metallurgical slag, waste from municipal and industrial wastewater treatment, etc., in the building materials industry are considered. It has been established that the use of incinerated sewage sludge ash in construction is a promising direction in terms of environmental and economic efficiency. The research confirmed the compliance of the lightweight ash-based concrete components to the regulatory documentation requirements for a number of indicators. As a result of the research, the composition of the raw mixture for the lightweight concrete production with incinerated sewage sludge ash as a replacement for a part of the cement has been developed. In terms of parameters, the developed concrete corresponds to standard lightweight concrete, marked in accordance with the regulatory documents of the Russian Federation as D1300 (density not less than 1.3 g/cm3), Btb2 (flexural strength not less than 2 MPa), M200/B15 (compressive strength not less than 15 MPa). Lightweight ash-based concrete is suitable for use in construction, repair of roads and improvement of urban areas.

How to cite: Litvinova T.E., Suchkov D.V. Lightweight ash-based concrete production as a promising way of technogenic product utilization (on the example of sewage treatment waste) // Journal of Mining Institute. 2023. Vol. 264. p. 906-918. EDN LMZCWZ
Modern Trends in Hydrocarbon Resources Development
  • Date submitted
    2022-06-09
  • Date accepted
    2022-11-17
  • Date published
    2022-12-29

Drilling of deep and ultra-deep wells for prospecting and exploration of new raw mineral fields

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Scientific and technological progress over the last century has led to an enormous increase in the consumption of minerals, including energy resources. Most of the exploited oil and gas fields are already considerably depleted, so it is necessary to search for new hydrocarbon resources, particularly at great depths. Deep drilling plays a special role in solving this problem. The article considers the world and Russian experience of ultra-deep wells drilling. The methods and technologies used in the construction of wells, as well as complications and accidents occurring during their drilling were analyzed. The analysis revealed that the existing limitations for drilling parameters of deep and ultra-deep wells are caused by the technical characteristics of surface and bottomhole drilling equipment, which do not meet the extreme drilling conditions. The directions for development of deep and ultra-deep well drilling machinery and technologies are suggested. The notion of extreme rock and geological drilling conditions is introduced, which describes drilling in conditions of hydrostatic pressure of flushing fluid column and high bottomhole temperature both at stable and unstable wellbore conditions, coming close to the upper limit of operating technical characteristics of bottomhole assembly, the drill string and flushing fluid.

How to cite: Dvoynikov M.V., Sidorkin D.I., Yurtaev S.L., Grokhotov E.I., Ulyanov D.S. Drilling of deep and ultra-deep wells for prospecting and exploration of new raw mineral fields // Journal of Mining Institute. 2022. Vol. 258. p. 945-955. DOI: 10.31897/PMI.2022.55
Geotechnical Engineering and Engineering Geology
  • Date submitted
    2021-09-02
  • Date accepted
    2022-01-24
  • Date published
    2022-04-29

Complex processing of high-carbon ash and slag waste

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The paper considers a current issue of ash and slag processing for the Polyus Aldan JSC, that has accumulated over 1 million tons of this waste. Following the results of the review of Russian and foreign literature, four promising areas of their use were selected: road construction, building materials, reclamation of disturbed lands, and inert aggregates. To assess the possibility of implementing the selected disposal directions, the samples of ash and slag waste of the enterprise were sampled and analyzed. Fuel characteristics, chemical and mineral composition, as well as physico-chemical and mechanical properties of waste were determined. Taking into account the results of complex laboratory studies and the requirements of regulatory documents, each of the selected areas of using ash and slag waste was evaluated. It was found that their disposal by traditional methods has limitations, mainly related to the high content of unburned fuel residues. The high content of combustible substances and the high specific heat of combustion with a relatively low ash content suggested the possibility of thermal disposal of the studied waste. Based on the literature data, the characteristics of the preparation of organic coal-water suspensions based on the studied ash and slag waste were selected. As a result of a series of experiments on their flaring, the expediency of using the obtained fuel at the enterprise under consideration has been proved. The authors note the possibility of using ash obtained after thermal waste disposal in the road construction industry. The prospects for further research of technologies for the preparation and combustion modes of suspension fuel based on ash and slag waste are determined.

How to cite: Chukaeva M.A., Matveeva V.A., Sverchkov I.P. Complex processing of high-carbon ash and slag waste // Journal of Mining Institute. 2022. Vol. 253. p. 97-104. DOI: 10.31897/PMI.2022.5
Geotechnical Engineering and Engineering Geology
  • Date submitted
    2021-03-05
  • Date accepted
    2021-09-07
  • Date published
    2021-12-16

Utilization of sewage sludge as an ameliorant for reclamation of technogenically disturbed lands

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When rehabilitating technogenically disturbed lands of mining facilities, fertilizers and ameliorants are to be applied due to the lack of organic matter and nutrients required for the restoration of the soil and vegetation layer. The use of unconventional fertilizers (ameliorants) based on sewage sludge is one of the actual directions of land reclamation at mining sites. The purpose of the work is to summarize and analyze up-to-date information on the effectiveness of the use of sewage sludge for the reclamation of technogenically disturbed lands of mining and processing industries. The analysis is based on a review of recent studies aimed at assessing the impact of introduced sediment on soils, plant communities, and rehabilitated areas. The introduction of sewage sludge has a positive effect on the physical and chemical parameters of the soil (optimizes density and aggregation), saturates it with nutrients, i.e. N, P, K, Ca, Mg, and Na, thus improving plant growth indicators. However, it may contain a number of heavy metals and pathogens; therefore, studies of each sediment and conditions of reclaimed areas are necessary.

How to cite: Petrova T.A., Rudzisha E. Utilization of sewage sludge as an ameliorant for reclamation of technogenically disturbed lands // Journal of Mining Institute. 2021. Vol. 251. p. 767-776. DOI: 10.31897/PMI.2021.5.16
Geotechnical Engineering and Engineering Geology
  • Date submitted
    2021-02-20
  • Date accepted
    2021-10-18
  • Date published
    2021-12-16

Thermal protection implementation of the contact overheadline based on bay controllers of electric transport traction substations in the mining industry

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The article presents the principle of thermal protection of the contact overheadlineand substantiates the possibility of practical implementation of this principle for rail electric transport in the mining industry. The algorithm for the implementation of modern digital protection of the contact overhead line as one of the functions of the controller is described. A mathematical model of thermal protection is proposed, which follows from the solution of the heat balance equation. The model takes into account the coefficient of the electrical networktopology, as well as the coefficient of consumption of the current-carrying core of the cable, which determines the reduction in the conducting section from contact erosion and the growth of oxide films. Corrections for air flows are introduced when receiving data from an external anemometer, via telemechanics protocol. The mathematical model was tested by writing a real thermal protection program in the C programming language for the bay controller, based on the circuitry of which is the STM32F407IGT6 microcontroller for the microcontroller unit. Verification tests were carried out on a serial bay controller in 2020. The graphs for comparing the calculated and actual values of temperatures, with different flow rates of the current-carrying conductor of the DC cable, are given. To obtain data, telemechanics protocols IEC 60870-104 and Modbus TCP, PLC Segnetics SMH4 were used.

How to cite: Lantsev D.Y., Frolov V.Y., Zverev S.G., Uhrlandt D., Valenta J. Thermal protection implementation of the contact overheadline based on bay controllers of electric transport traction substations in the mining industry // Journal of Mining Institute. 2021. Vol. 251. p. 738-744. DOI: 10.31897/PMI.2021.5.13
Mining
  • Date submitted
    2021-01-18
  • Date accepted
    2021-05-21
  • Date published
    2021-09-20

Improving the efficiency of the technology and organization of the longwall face move during the intensive flat-lying coal seams mining at the Kuzbass mines

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The reasons for the lag of the indicators of the leading Russian coal mines engaged in the longwall mining of the flat-lying coal seams from similar foreign mines are considered. The analysis of the efficiency of the longwall face move operations at the JSC SUEK-Kuzbass mines was carried out. A significant excess of the planned deadlines for the longwall face move during the thick flat-lying seams mining, the reasons for the low efficiency of disassembling operations and the main directions for improving the technology of disassembling operations are revealed. The directions of ensuring the operational condition of the recovery room formed by the longwall face are considered. The recommended scheme of converged coal seams mining and a three-dimensional model of a rock mass to justify its parameters are presented. Numerical studies using the finite element method are performed. The results of modeling the stress-strain state of a rock mass in the vicinity of a recovery room formed under conditions of increased stresses from the boundary part of a previously mined overlying seam are shown. The main factors determining the possibility of ensuring the operational condition of the recovery rooms are established. It is shown that it is necessary to take into account the influence of the increased stresses zone when choosing timbering standards and organizing disassembling operations at a interbed thickness of 60 m or less. A sufficient distance from the gob of above- or undermined seams was determined to ensure the operational condition of the recovery room of 50 m, for the set-up room – 30 m. Recommendations are given for improving technology and organization of the longwall face move operations at the mines applied longwall mining of flat-lying coal seams with the formation of a recovery room by the longwall face.

How to cite: Meshkov А.A., Kazanin O.I., Sidorenko A.A. Improving the efficiency of the technology and organization of the longwall face move during the intensive flat-lying coal seams mining at the Kuzbass mines // Journal of Mining Institute. 2021. Vol. 249. p. 342-350. DOI: 10.31897/PMI.2021.3.3
Mining
  • Date submitted
    2021-01-25
  • Date accepted
    2021-02-22
  • Date published
    2021-04-26

Conducting industrial explosions near gas pipelines

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The problem to ensure the safety of objects which are in the area of blasting operations, ensuring the destruction of hard rocks, remains relevant. The article presents the results of a large-scale experiment to determine the safe conditions for conducting drilling and blasting operations near the active gas pipeline. The simplest and most reliable way to ensure the safety of the protected object from seismic impact is to reduce the intensity of the seismic wave, which is achieved by changing the parameters of drilling and blasting operations. This requires research to determine the impact of blasting operations on the parameters of seismic waves and the development of methods for measuring these parameters. The paper presents a detailed analysis of the seismic blast wave impact on the displacement of the ground and the model gas pipeline. The features of seismic monitoring during blasting operations near the active gas pipeline are shown. The seismic coefficients and attenuation coefficient of seismic waves are determined. It is proved that the readings of the seismic receivers on the surface and in the depth of the massive differ by two or more times.

How to cite: khokhlov S.V., Sokolov S.T., Vinogradov Y.I., Frenkel I.B. Conducting industrial explosions near gas pipelines // Journal of Mining Institute. 2021. Vol. 247. p. 48-56. DOI: 10.31897/PMI.2021.1.6
Electromechanics and mechanical engineering
  • Date submitted
    2020-01-09
  • Date accepted
    2020-01-26
  • Date published
    2020-02-25

Mining excavator working equipment load forecasting according to a fuzzy-logistic model

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Due to the fact that the loads occurring in the working equipment of mining excavators are determined by a large number of random factors that are difficult to represent by analytical formulas, for estimating and predicting loads the models must be introduced using non-standard approaches. In this study, we used the methodology of the theory of fuzzy logic and fuzzy pluralities, which allows to overcome the difficulties associated with the incompleteness and vagueness of the data in assessing and predicting the forces encountered in the working equipment of mining excavators, as well as with the qualitative nature of these data. As a result of computer simulation in the fuzzyTECH environment, data comparable with experimental studies were obtained to determine the level of loading of the main elements of the working equipment of mining excavators. Based on a representative sample, a statistical analysis of the data was performed, as a result of which the equation of linear multiple stress regression in the handle of mining excavators was obtained, which allows to make an accurate forecast of the loading of the working equipment of the excavator.

How to cite: Velikanov V.S. Mining excavator working equipment load forecasting according to a fuzzy-logistic model // Journal of Mining Institute. 2020. Vol. 241. p. 29-36. DOI: 10.31897/PMI.2020.1.29
Oil and gas
  • Date submitted
    2018-07-21
  • Date accepted
    2018-09-03
  • Date published
    2018-12-21

Possibilities of open eruption elimination by drilling tools

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The most important raw materials for different industries are oil and natural gas. With increasing consumption, the demand for drilling and the quality of production increases. Therefore, the exploration and production of hydrocarbons requires not only first-class machinery and technological equipment, but also qualified personnel. Exploration and drilling, production of hydrocarbons, like any other industry, cannot avoid accidents, emergencies and catastrophes. The worst type of well accident is undoubtedly an open eruption of the extracted crude oil. Open eruption can lead to serious injuries to the rig personnel, damage and destruction of equipment, negative environmental impact and loss of crude oil. Exploratory drilling can cause the rise of pressure and its subsequent manifestations. During the first deep drilling, there may not be enough information about the drilled horizons. If the reservoir pressure in the production horizon is higher than the hydrostatic pressure of the fluid in the well (for example, drilling mud), the formation fluids flow into the well and move towards the surface, which causes open eruption. The rig personnel must be properly trained to be able to recognize the occurrence of rising pressure by various signs and to respond effectively to the situation. Sometimes, under the influence of the human factor or equipment failure, open eruption still occurs. The article discusses the possibilities of eliminating open eruptions with drilling tools.

How to cite: Bujok P., Klempa M., Jakubcik M., Ryba J., Porzer M. Possibilities of open eruption elimination by drilling tools // Journal of Mining Institute. 2018. Vol. 234. p. 624-629. DOI: 10.31897/PMI.2018.6.624
Electromechanics and mechanical engineering
  • Date submitted
    2018-01-12
  • Date accepted
    2018-03-08
  • Date published
    2018-06-22

A method for controlling siltation of water catchments of district drainage systems of kimberlite mines

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High contamination of mine water leads to intensive siltation of water catchments of district water drainage installations of kimberlite mines in Russia, because of which their pumping equipment periodically works in non-stationary regimes. At present, a number of known methods are used to limit the operation of pumping equipment in non-stationary modes: equipping the pump with a hand hoist to regulate the depth of lowering its suction pipeline into the sinkhole; preliminary dismantling of one of the two screen filters, mounted in the suction pipeline of the pump, which has smaller cells. Experience in the operation of water-drainage farms of kimberlite mines shows that these two methods allow to prevent the operation of pumping equipment in non-stationary modes only for a short period of time. A mine drainage installation is proposed, the technical result of which is the effective struggle against the silting of the water catchments of the district drainage systems of the kimberlite mines of the country.

How to cite: Ovchinnikov N.P. A method for controlling siltation of water catchments of district drainage systems of kimberlite mines // Journal of Mining Institute. 2018. Vol. 231. p. 317-320. DOI: 10.25515/PMI.2018.3.317
Electromechanics and mechanical engineering
  • Date submitted
    2017-08-25
  • Date accepted
    2017-11-17
  • Date published
    2018-02-22

Improved estimation of open pit excavator capacity

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The paper addresses issues related to estimation of operational time for open pit excavators during truck loading operations. The author analyzes the method of annual capacity estimation and highlights disagreements in different ways of operational time logging. Recommendations are offered concerning estimation of excavator capacity taking into account its repair cycle. The paper contains an analysis of the cyclical nature of various types of maintenance in the interval between capital repairs as a function of operational time. Guidelines are proposed that allow to calculate annual production days of the excavator with regards to the repair cycle and adjusted utilization coefficient throughout the shift. It has been established that decreasing the coefficient of excavator utilization throughout the shift and more precise logging of annual work days lead to a slower decrease in estimated machine capacity than the one described in the reference literature. According to the suggested method, estimated excavator capacity is more than 23 % higher than the value stated in the reference literature.

How to cite: Zharikov S.N. Improved estimation of open pit excavator capacity // Journal of Mining Institute. 2018. Vol. 229. p. 56-61. DOI: 10.25515/PMI.2018.1.56
Metallurgy and concentration
  • Date submitted
    2015-10-14
  • Date accepted
    2015-12-18
  • Date published
    2016-08-22

Complex utilization of treatment wastes from thermal power plants

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The paper investigates present-day challenges related to accumulation, processing and disposal of the coal combustion wastes. The analysis of technogenic materials beneficiation practices using gravitation, magnetic and flotation beneficiation methods has been carried out. Quantitative and qualitative microscopic analysis of materials has been conducted. The study target were ash and slag wastes (ASW) from thermal power plant and coal combustion ash. Most metals are contained in coals and coal ashes in fine-dispersed (1-10 μm) mineral form. Various native metals and intermetallic compounds, sulfides, carbonates, sulfates, tungstates, silicates, rare earths phosphates and niobates have been discovered. Each metal may occur in several mineral phases, for instance tungsten may be in the form of wolframite, stolzite, ferberite, scheelite and represented by impurities. Not only composition of compounds is diversified, but also morphology of grains: well-defined and skeleton crystals, aggregates and polycrystalline structures, crystal twins and fragments; druses, globules and microspherules; porous shapes, flocculous and splintery clusters, lumpy aggregations, etc. Based on chemical silicate analysis of main ASW components the petrochemical properties of material have been assessed. Preliminary analyses have shown that concentration of ferrum-bearing components in ASW is around 5-11 %. The magnetic method of technogenic waste beneficiation with the help of high-gradient magnetic separation has been studied. The obtained evidences show that fine ASW are most efficiently separated in separators with high-gradient magnetic system. The studies provided justification of a process flow for complex treatment of technogenic carbon-containing material, including flotation, gravitation separation, magnetic heteroflocculation enrichment and high-gradient magnetic separation. The determined complex utilization ratio has proven the efficiency of complex processing.

How to cite: Shabarov A.N., Nikolaeva N.V. Complex utilization of treatment wastes from thermal power plants // Journal of Mining Institute. 2016. Vol. 220. p. 607-610. DOI: 10.18454/PMI.2016.4.607
Electromechanics and mechanical engineering
  • Date submitted
    2015-08-23
  • Date accepted
    2015-10-26
  • Date published
    2016-04-22

Low-voltage electrical apparatus

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The article describes the main trends in the development of low-voltage electrical appliances and related accessories, as well as issues of efficiency, reliability and safety. According to the authors, the main trends in the development of low-voltage apparatus can be considered: the transition from the use of certain devices to the system devices, unified by the process of installation and running in standard modules and comply with all the functional requirements of control systems; improving the standardization and normalization of the EA on an international scale; unification of constructive elements of the EA; increase the volume of production of complete device management and contactless application logic control systems and specialized computers for management purposes; increase the proportion of contactor relay equipment DC, performs a variety of control functions. Improved security service low voltage, through the use of low voltage (24 V DC, 110 V AC), voltage presence signaling devices; increase the proportion of and the use of combined control and protection devices as well as devices for the automation of recruitment and duty cycles of machines: differentsequencer, track control devices, relays, pulse counting, and so on. n.

How to cite: Apollonskii S.M., Kuklev Y.V. Low-voltage electrical apparatus // Journal of Mining Institute. 2016. Vol. 218. p. 251-260.
Mining machine, electrical engineering and electromechanics
  • Date submitted
    2010-07-06
  • Date accepted
    2010-09-14
  • Date published
    2011-03-21

Electromechanical processes in electric drives of mountain equipment on the basis of the synchronous electric motor

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The description is given and the function chart of the bench installation is resulted, allowing to reproduce static and dynamic modes of adjustable electric drives of an alternating current. The modes considered during experimental researches of the electric drive on the basis of the synchronous electric motor, working in a mode of ventilniy electric motor are listed. Conclusions are drawn on character of course of dynamic modes, comparison of the electric drive to the synchronous electric motor and the electric drive of a direct current with the subordinated regulation is given.

How to cite: Sviridenko A.O. Electromechanical processes in electric drives of mountain equipment on the basis of the synchronous electric motor // Journal of Mining Institute. 2011. Vol. 189. p. 103-106.
Mining machine, electrical engineering and electromechanics
  • Date submitted
    2010-07-10
  • Date accepted
    2010-09-15
  • Date published
    2011-03-21

Reduction methods of high harmonics influence on the electric equipment operation

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This work contains brief analysis of high harmonics reduction methods. It is offered to make a choice between reduction methods of high harmonics influence on condenser batteries depending on factors of harmonics occurrence. Definition algorithm for the most effective method of high harmonics reduction on condenser batteries operation is created.

How to cite: Shklyarsky Y.E., Skamin A.N. Reduction methods of high harmonics influence on the electric equipment operation // Journal of Mining Institute. 2011. Vol. 189. p. 121-124.
Problems in geodynamic safety in the exploration of solid deposits
  • Date submitted
    2009-10-12
  • Date accepted
    2009-12-26
  • Date published
    2010-09-22

Methods and techniques for control of rockburst-hazard in underground mining at ore mines of the Far-East district

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An assessment is given to the present-day state of control of dynamic rock pressure manifestations in the rockburst-hazardous ore mines of the Far-East district. Consideration is given to the used methods and facilities for control of rock pressure and the ways for their improvement . Basic foundations of methodical approaches to the assessment of geomechanical state of rock mass by data of geoacoustic control are considered.

How to cite: Rasskazov I.Y., Kalinov G.A., Miroshnikov V.I., Migunov D.S., Iskra A.Y., Anikin P.A. Methods and techniques for control of rockburst-hazard in underground mining at ore mines of the Far-East district // Journal of Mining Institute. 2010. Vol. 188. p. 18-22.
Problems in geodynamic safety in the exploration of solid deposits
  • Date submitted
    2009-10-13
  • Date accepted
    2009-12-29
  • Date published
    2010-09-22

Assessment of the level of technological production of coal reserves in mine fields with intensive mining of fiat-lying coal seams

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The levels of technological production of coal reserves in the stoping faces have been determined depending on the main determining factors, such as suitability of conditions, their preparation and equipment of longwalls.

How to cite: Baranov S.G., Rozenbaum M.A. Assessment of the level of technological production of coal reserves in mine fields with intensive mining of fiat-lying coal seams // Journal of Mining Institute. 2010. Vol. 188. p. 43-46.
Problems in geodynamic safety in the exploration of solid deposits
  • Date submitted
    2009-10-23
  • Date accepted
    2009-12-11
  • Date published
    2010-09-22

Aspects in geomechanics and safety in exploration of solid mineral deposits

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The paper deals with the aspects of safety in mining at the ore mine «Norilsk nickel», the Yakovlevsky iron ore deposit, the Verkhnekamsk potassium-magnesium deposit of salts. It was shown that with due account of state of mining at the objects related to the utilization of the Earth's interior, the normative-legal support of mining regulation in the field of geomechanics is rather actual and it requires researches into the activities of mining enterprises as well as in the control work carried out by supervisory bodies of Mining Supervision.

How to cite: Perepelitsyn A.I. Aspects in geomechanics and safety in exploration of solid mineral deposits // Journal of Mining Institute. 2010. Vol. 188. p. 23-25.
Mining
  • Date submitted
    2009-08-18
  • Date accepted
    2009-10-10
  • Date published
    2010-02-01

Increase of efficiency performance of complexes open-cut equipment

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At definition of benches height many features and factors are taken into consideration: conditions of burial and property of taken out rocks; necessary intensity of mining work; the planned schedule of strippings; demanded quality given out, from mineral opencast; parametres of drilling-and-blastings; working conditions of excavators and a condition of transportation of ore. The basic condition of correctly chosen bench height is its stability in the course of operation the opencast mine providing safety of conducting of mining operations.

How to cite: Faul A.A. Increase of efficiency performance of complexes open-cut equipment // Journal of Mining Institute. 2010. Vol. 186. p. 86-89.
Problems in conservation of resources? mine surveying and wise erth's interior utilization
  • Date submitted
    2009-07-29
  • Date accepted
    2009-09-29
  • Date published
    2010-04-22

State examination of mineral reserves in the system of wise utilization of the earth’s interior

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The major problem of bodies of the government in sphere of regulation of attitudes protection of reserves creation of conditions for rational use of resources. The basic role in its decision is played with examination protection of reserves. Maintenance of effective carrying out of examination demands its constant perfection with reference to market conditions with use of the international criteria regarding both calculation and an estimation of stocks, and drawing up design and the engineering specifications on development of mineral deposits.

How to cite: Podturkin Y.A. State examination of mineral reserves in the system of wise utilization of the earth’s interior // Journal of Mining Institute. 2010. Vol. 185. p. 188-190.
Problems in conservation of resources? mine surveying and wise erth's interior utilization
  • Date submitted
    2009-07-28
  • Date accepted
    2009-09-21
  • Date published
    2010-04-22

Legislation-legal and normative-technical support of the utilization of the earth's interior

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The article considers the aspects of the legislation-legal and normative-technical support of the Earth's interior utilization. It is noted that mineral resources in Russia appear to be the basic source for the economic development. It is shown that there is no due attention to the development of the normative-methodological base of the Earth's interior utilization.

How to cite: Zimich V.S., Vasilchuk M.P. Legislation-legal and normative-technical support of the utilization of the earth’s interior // Journal of Mining Institute. 2010. Vol. 185. p. 191-195.