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Geology
  • Date submitted
    2024-05-15
  • Date accepted
    2025-01-28
  • Date published
    2025-04-30

Study of changes in the void space of core samples under cyclic loading

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The subsurface state is explored and analysed by studying the core material. This is the basis for forecasts, construction and improvement of models. The reservoir properties of rocks obtained from the laboratory study of sample are subject to a system error caused by three main factors: rock selection in the zone of altered stress-strain state, rock removal from the thermobaric conditions of natural occurrence, and the measuring equipment error. A change in the natural stress-strain state of rocks occurs as a result of intervention in the formation system and the entire massif by constructing a well, creating overburden and depression. The rise of the core causes unloading from formation pressure to atmospheric one, natural saturation is lost, temperature conditions change. This affects the reservoir properties and rock injectivity. This study is aimed at investigating changes in the void space of the rock in formation conditions under cyclic loading. Based on the data obtained, a regression forecast of properties is made, excluding external influences. The article describes the results of experiments on multiple loading and unloading of water-saturated sandstone samples by geostatic pressure with precise control of the water displaced and returned to the void space. This method enables us to record the change in the internal void volume of the rock and, as a consequence, elastic and plastic deformations, the value of relaxation of elastic deformations. The dynamics of change in the coefficients of porosity and compressibility from the stress state cycle is estimated and the range of predicted porosity values ​​of the rock in formation conditions is determined. For samples of permeable medium- to fine-grained sandstone, the obtained character of porosity change gives a forecast of the initial porosity in formation conditions of 20.19±0.61 %. Thus, the exclusion of human impact on porosity gives values ​​1.42 % higher than the results of standard laboratory studies.

How to cite: Grigorev B.V., Kraev A.D., Sadykova A.P., Moshonkin A.A. Study of changes in the void space of core samples under cyclic loading // Journal of Mining Institute. 2025. p. EDN HTZPRR
Geotechnical Engineering and Engineering Geology
  • Date submitted
    2024-06-17
  • Date accepted
    2024-07-17
  • Date published
    2025-04-25

Justification on the safe exploitation of closed coal warehouse by gas factor

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The annual increase of coal production and its demand lead to the necessity in temporary storage places (warehouses) organization to accommodate raw coal materials before the shipment. It is noted that at the open method of coal storing the dust emission from loading/unloading operations and from the pile surface effects negatively the health of the warehouse workers and adjacent territories. An alternative solution is closed-type warehouses. One of the main hazards of such coal storage can be the release of residual methane from coal segregates into the air after degassing processes during mining and extraction to the surface, as well as transportation to the place of temporary storage. The study carries the analysis of methane content change in coal during the processes of extraction, transportation and storage. Physical and chemical bases of mass transfer during the interaction between gas-saturated coal mass and air are studied. It is determined that the intensity of methane emission depends on: the coal seam natural gas content, parameters of mass transfer between coal, and air and the ambient temperature. The dynamics of coal mass gas exchange with atmospheric air is evaluated by approximate approach, which is based on two interrelated iterations. The first one considers the formation of methane concentration fields in the air space of the bulk volume and the second accounts the methane emission from the pile surface to the outside air. It is determined that safety of closed coal warehouses exploitation by gas factor can be ensured by means of artificial ventilation providing volumetric methane concentration in the air less than 1 %. The flow rate sufficient to achieve this methane concentration was obtained as a result of computer modeling of methane concentration fields formation in the air medium at theoretically calculated methane emission from the pile surface.

How to cite: Gendler S.G., Stepantsova A.Y., Popov M.M. Justification on the safe exploitation of closed coal warehouse by gas factor // Journal of Mining Institute. 2025. Vol. 272 . p. 72-82. EDN SIJDWE
Energy industry
  • Date submitted
    2023-03-14
  • Date accepted
    2023-06-20
  • Date published
    2023-07-19

The wireless charging system for mining electric locomotives

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The electric vehicles development has a high potential for energy saving: an energy-saving traffic control can reduce energy resource consumption, and integration with the power grid provides the ability of daily load pattern adjustment. These features are also relevant for underground mining. The critical element of vehicle-to-grid integration is the charging infrastructure, where wireless charging is promising to develop. The implementation of such systems in underground mining is associated with energy efficiency issues and explosion safety. The article discusses the development and research of a wireless charging system for mining electric locomotive A-5.5-600-U5. The analytic hierarchy process is used for justification of the circuitry and design solution by a comparison of different technical solutions based on energy efficiency and safety criteria. A complex computer model of the wireless charging system has been developed that gives the transients in the electrical circuit of a wireless charging system and the high-frequency field density distribution near the transmitting and receiving coils in a 3D setting. An approach to ignition risk evaluation based on the analysis of high-frequency field density in the charging area between the coils of the wireless charging system is proposed. The approach using a complex computer model is applied to the developed system. The study showed that the wireless charging system for mining electric locomotives operating in the gaseous-and-dusty mine is technically feasible and there are designs in which it is explosion safe.

How to cite: Zavyalov V.M., Semykina I.Y., Dubkov E.A., Velilyaev A.- han S. The wireless charging system for mining electric locomotives // Journal of Mining Institute. 2023. Vol. 261 . p. 428-442. EDN JSNTAQ
Modern Trends in Hydrocarbon Resources Development
  • Date submitted
    2022-08-20
  • Date accepted
    2022-11-17
  • Date published
    2022-12-29

Comparison of the approaches to assessing the compressibility of the pore space

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Integral and differential approaches to determining the volumetric compression of rocks caused by changes in the stress state are considered. Changes in the volume of the pore space of rocks are analyzed with an increase in its all-round compression. Estimation of changes in the compressibility coefficients of reservoirs due to the development of fields is an urgent problem, since the spread in the values of compressibility factors reduces the adequacy of estimates of changes in the physical properties and subsidence of the earth's surface of developed fields and underground gas storages. This parameter is key in assessing the geodynamic consequences of the long-term development of hydrocarbon deposits and the operation of underground gas storage facilities. Approaches to the assessment differ in the use of cumulative (integral) or local (differential) changes in porosity with a change in effective pressure. It is shown that the coefficient of volumetric compressibility of pores calculated by the integral approach significantly exceeds its value calculated by the differential approach, which is due to the accumulative nature of pore compression with an increase in effective pressure. It is shown that the differential approach more accurately determines the value of the pore compressibility coefficient, since it takes into account in more detail the features of the change in effective pressure.

How to cite: Zhukov V.S., Kuzmin Y.O. Comparison of the approaches to assessing the compressibility of the pore space // Journal of Mining Institute. 2022. Vol. 258 . p. 1008-1017. DOI: 10.31897/PMI.2022.97
Geology
  • Date submitted
    2021-12-21
  • Date accepted
    2022-06-20
  • Date published
    2022-11-10

Scientific justification of the perforation methods for Famennian deposits in the southeast of the Perm Region based on geomechanical modelling

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The article presents the results of analysing geological structure of the Famennian deposits (Devonian) in the Perm Region. Numerical modelling of the distribution of inhomogeneous stress field near the well was performed for the two considered types of perforation. With regard for the geometry of the forming perforation channels, numerical finite element models of near-wellbore zones were created considering slotted and cumulative perforation. It is ascertained that in the course of slotted perforation, conditions are created for a significant restoration of effective stresses and, as a result, restoration of reservoir rock permeability. Stress recovery area lies near the well within a radius equal to the length of the slots, and depends on the drawdown, with its increase, the area decreases. From the assessment of failure areas, it was found that in case of slotted perforation, the reservoir in near-wellbore zone remains stable, and failure zones can appear only at drawdowns of 10 MPa and more. The opposite situation was recorded for cumulative perforation; failure zones near the holes appear even at a drawdown of 2 MPa. In general, the analysis of results of numerical simulation of the stress state for two simulated types of perforation suggests that slotted perforation is more efficient than cumulative perforation. At the same time, the final conclusion could be drawn after determining the patterns of changes in permeability of the considered rocks under the influence of changing effective stresses and performing calculations of well flow rates after making the considered types of perforation channels.

How to cite: Chernyshov S.E., Popov S.N., Varushkin S.V., Melekhin A.A., Krivoshchekov S.N., Ren S. Scientific justification of the perforation methods for Famennian deposits in the southeast of the Perm Region based on geomechanical modelling // Journal of Mining Institute. 2022. Vol. 257 . p. 732-743. DOI: 10.31897/PMI.2022.51
Geotechnical Engineering and Engineering Geology
  • Date submitted
    2021-04-06
  • Date accepted
    2022-04-27
  • Date published
    2022-07-13

Experimental study on the effect of rock pressure on sandstone permeability

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The results of laboratory studies to determine the effect of effective stress on the permeability of sandstone are presented. During the test, the samples were subjected to a stepwise increase or decrease of the effective stress (at a constant pore pressure) in a specified step. The values of rock permeability at different values of effective stress were determined, and the influence of the grain size of the reservoir rock matrix on the character of the change in the sandstone permeability coefficient was also established. During the test, a decrease in permeability was observed with an increase in effective stress. It was found that as a result of gradual loading/unloading of the sandstone sample, the original permeability values were not restored, which indicates the beginning of the formation of residual strains in the rock. This effect should be taken into account when modeling field development because in the process of reserves extraction the effective stress acting on the reservoir rock skeleton changes, which results in a significant chang in rock permeability. The results of laboratory studies showed that the deviation of permeability in medium-grained sandstones relative to the initial value was greater than in medium- and fine-grained sandstones. The pressure sensitivity coefficient and constant of material, which are used in empirical relationships between permeability and effective stress, were numerically estimated. At the same time, the constant of material showed no such convergence, which indicates that the values of this parameter are individual for each rock.

How to cite: Petrakov D.G., Penkov G.M., Zolotukhin A.B. Experimental study on the effect of rock pressure on sandstone permeability // Journal of Mining Institute. 2022. Vol. 254 . p. 244-251. DOI: 10.31897/PMI.2022.24
Oil and gas
  • Date submitted
    2019-12-25
  • Date accepted
    2020-06-30
  • Date published
    2020-10-08

Accounting of geomechanical layer properties in multi-layer oil field development

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Amid the ever-increasing urgency to develop oil fields with complex mining and geological conditions and low-efficiency reservoirs, in the process of structurally complex reservoir exploitation a number of problems arise, which are associated with the impact of layer fractures on filtration processes, significant heterogeneity of the structure, variability of stress-strain states of the rock mass, etc. Hence an important task in production engineering of such fields is a comprehensive accounting of their complex geology. In order to solve such problems, the authors suggest a methodological approach, which provides for a more reliable forecast of changes in reservoir pressure when constructing a geological and hydrodynamic model of a multi-layer field. Another relevant issue in the forecasting of performance parameters is accounting of rock compressibility and its impact on absolute permeability, which is the main factor defining the law of fluid filtration in the productive layer. The paper contains analysis of complex geology of a multi-layer formation at the Alpha field, results of compression test for 178 standard core samples, obtained dependencies between compressibility factor and porosity of each layer. By means of multiple regression, dependencies between permeability and a range of parameters (porosity, density, calcite and dolomite content, compressibility) were obtained, which allowed to take into account the impact of secondary processes on the formation of absolute permeability. At the final stage, efficiency of the proposed methodological approach for construction of a geological and hydrodynamic model of an oil field was assessed. An enhancement in the quality of well-by-well adaptation of main performance parameters, as well as an improvement in predictive ability of the adjusted model, was identified.

How to cite: Galkin S.V., Krivoshchekov S.N., Kozyrev N.D., Kochnev A.A., Mengaliev A.G. Accounting of geomechanical layer properties in multi-layer oil field development // Journal of Mining Institute. 2020. Vol. 244 . p. 408-417. DOI: 10.31897/PMI.2020.4.3
Electromechanics and mechanical engineering
  • Date submitted
    2019-05-24
  • Date accepted
    2019-07-15
  • Date published
    2019-10-23

Effective Power and Speed of Mining Dump Trucks in Fuel Economy Mode

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Existing methods for determining the effective power, based on the calculation of the average indicator operation of the engine during the piston stroke, do not take into account the change in thermodynamic parameters and the polytropic operation of the engine, the value of which depends on the polytropic efficiency of the duty cycle. This is the reason that the calculation of the effective power leads to some error – the margin of the engine features. The identification of this stock allows us to review the entire line of dump trucks in the direction of increasing their pass- port effective capacity, which will lead to a reduction in capital purchase costs due to the choice of a previously un- derestimated and cheaper option, as well as a reduction in current operating costs due to a decrease in the specific fuel consumption rate. Taking into account the stochastic nature of the transport process and assessing the influence of all external and internal factors when calculating the rational mode of operation of a mining truck can further reduce specific fuel consumption by choosing the rational speed of its movement in loaded and empty directions.

How to cite: Alexandrov V.I., Vasileva M.A., Koptev V.Y. Effective Power and Speed of Mining Dump Trucks in Fuel Economy Mode // Journal of Mining Institute. 2019. Vol. 239 . p. 556-563. DOI: 10.31897/PMI.2019.5.556
Electromechanics and mechanical engineering
  • Date submitted
    2018-09-08
  • Date accepted
    2018-11-01
  • Date published
    2019-02-22

Complexation of telecommunications and electrical systems in mines and under-ground facilities

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The possible options for the integration of telecommunications and electrical systems of mining enterprises are considered. Based on an analysis of the current state and prospects for the development of telecommunications systems, various technical solutions are proposed for sharing the power supply networks available in mines and underground structures in order to solve the problems of telecommunication, automate process control and ensure the safety of operations. The analysis of the possibilities of applying the PLC technology in underground structures and mines for solving specific telecommunication problems has been carried out, and examples of their possible technical and hardware implementation are given.

How to cite: Shpenst V.A. Complexation of telecommunications and electrical systems in mines and under-ground facilities // Journal of Mining Institute. 2019. Vol. 235 . p. 78-87. DOI: 10.31897/PMI.2019.1.78
Electromechanics and mechanical engineering
  • Date submitted
    2017-09-10
  • Date accepted
    2017-11-10
  • Date published
    2018-02-22

Research of heat generation indicators of gas engines

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A comprehensive strategy for reviving the production of mining industry equipment and ensuring its competitiveness includes the wide use of gas engines for various purposes. Experimental studies of the working cycle of a gas engine are one of the main tasks in determining the heat generation characteristics. To this end, indicator charts were recorded in various modes, which were subjected to analysis in order to determine the key parameters characterizing intra-cylinder processes. According to the experimental program, the maximum cycle pressure, the rate of pressure build-up, the heat generation characteristic, the first heat generation phase, the duration of the second combustion phase, and the effect of the ignition advance angle for the ignition period were determined. The results of an experimental study of the influence of gas engine working process with allowance for the change in the ignition advance angle for the ignition period are described and the parameters of the maximum cycle pressure, the rate of pressure build-up, and the heat generation characteristics are determined. In the processing of data, integral charts are constructed, the working cycle parameters are calculated, and the dynamics of the engine heat generation is determined.

How to cite: Didmanidze O.N., Afanasev A.S., Khakimov R.T. Research of heat generation indicators of gas engines // Journal of Mining Institute. 2018. Vol. 229 . p. 50-55. DOI: 10.25515/PMI.2018.1.50
Mining
  • Date submitted
    2015-07-30
  • Date accepted
    2015-09-11
  • Date published
    2016-02-24

Principles of corporate communications management system development for mineral resources companies

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The article shows the benefits of using unified communications for the management of mineral resources companies and discusses some principles of a modern corporate communications system providing the guaranteed encryption of all transmitted information (voice, text and files). The system structure, its operations and technologies, necessary for the creation of such a system, are substantiated. The secure corporate communication system developed at the National Mineral Resources University (Mining University) is described, and its comparison with other domestic and foreign systems is provided.

How to cite: Makhovikov A.B. Principles of corporate communications management system development for mineral resources companies // Journal of Mining Institute. 2016. Vol. 217 . p. 24-28.
Philosophy and history of science, culture and education
  • Date submitted
    2009-09-18
  • Date accepted
    2009-11-14
  • Date published
    2010-06-25

Challenges and perspectives for innovative interactive communication technologies in teaching humanities

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The ongoing reform of higher education in Russia requires finding new approaches to syllabus planning, new ways to manage and supervise students’ individual academic activities. Humanities are not limited to information transfer, they aim at developing students’ analytic abilities as well. Thus, the interaction between students and teachers becomes of utmost importance. The reform allows increasing the share of extramural activities, which creates a challenge of preserving interactivity. In the article, the author has considered cutting-edge interactive communication technologies that can help teachers coordinate students’ extramural studies and encourage their epistemic curiosity they need to absorb humanities.

How to cite: Rassadina S.A. Challenges and perspectives for innovative interactive communication technologies in teaching humanities // Journal of Mining Institute. 2010. Vol. 187 . p. 207-212.
Innovative approaches to the teaching of philology and the culture of disciplines in technical colleges
  • Date submitted
    2009-09-17
  • Date accepted
    2009-11-07
  • Date published
    2010-06-25

Test as the form of the economics departments students final knowledge checking at studying the discipline «Business russian as the foreign language»

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The problems, appearing when compiling test materials for the students-foreigners of the economic professions, studying sphere of business communication, are analyzed in this article. The types of mistakes, allowed students in process of the performing the checking tasks, are systematized. It is offered the examples of the exercises, presented in test.

How to cite: Kolesova E.A. Test as the form of the economics departments students final knowledge checking at studying the discipline «Business russian as the foreign language» // Journal of Mining Institute. 2010. Vol. 187 . p. 326-328.
Innovative approaches to the teaching of philology and the culture of disciplines in technical colleges
  • Date submitted
    2009-09-24
  • Date accepted
    2009-11-16
  • Date published
    2010-06-25

Innovative approach to professional development programs creation

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This article represents one of approaches how to create refresher courses innovative modular programs. Modern higher school must ensure possibility of professional competence widening in new economical conditions. Speech strategic and tactics mastering is a foundation for self-actualization in the sphere of business communication.

How to cite: Zgurskaya O.G., Shchukina D.A. Innovative approach to professional development programs creation // Journal of Mining Institute. 2010. Vol. 187 . p. 322-325.
Innovative approaches to the teaching of philology and the culture of disciplines in technical colleges
  • Date submitted
    2009-09-28
  • Date accepted
    2009-11-12
  • Date published
    2010-06-25

Innovation technologies in practice of russian language teaching (case study linguoculturological analysis оf Saint Petersburg toponyms)

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In the given paper in terms of linguoculturological analysis of Saint Petersburg toponyms describes teaching aspects of innovation technologies in practice of Russian Language teaching.

How to cite: Galtsova A.S. Innovation technologies in practice of russian language teaching (case study linguoculturological analysis оf Saint Petersburg toponyms) // Journal of Mining Institute. 2010. Vol. 187 . p. 316-318.
Innovative approaches to the teaching of philology and the culture of disciplines in technical colleges
  • Date submitted
    2009-09-12
  • Date accepted
    2009-11-26
  • Date published
    2010-06-25

Professional communication: speech aspect

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In the article there is presented the speech aspect of professional communication in daily business and innovation interaction. The priority directions of the work on the components of communicative competence and speech literacy of specialist are determined (planning and the prognostication of speech situations, orienting for the partner, the improvement of communicative and speech culture).

How to cite: Barruelo Gonzalez E.U. Professional communication: speech aspect // Journal of Mining Institute. 2010. Vol. 187 . p. 308-311.
Effective communication skills development as social and cultural component of foreign language teaching ...
  • Date submitted
    2009-09-24
  • Date accepted
    2009-11-02
  • Date published
    2010-06-25

Oral presentation skills forming. Technical university undergraduates and phd students foreign language teaching а posteriori

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The article is dedicated to the educational methods of oral presentation in foreign language practical skills forming.

How to cite: Petrova A.A. Oral presentation skills forming. Technical university undergraduates and phd students foreign language teaching а posteriori // Journal of Mining Institute. 2010. Vol. 187 . p. 286-288.
Effective communication skills development as social and cultural component of foreign language teaching ...
  • Date submitted
    2009-09-30
  • Date accepted
    2009-11-08
  • Date published
    2010-06-25

Peculiarities of professional-oriented communication in english of students of geological specialities

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The article deals with the main peculiarities of educational environment in technical institutions that influence the effectiveness of training process. The issue of students’ preparing for real professional communication as a way of motivation increase is considered. Basic spheres of professional communication of future specialists during trips abroad are given; ways of developing professional skills are suggested.

How to cite: Gerasimova I.G. Peculiarities of professional-oriented communication in english of students of geological specialities // Journal of Mining Institute. 2010. Vol. 187 . p. 255-257.
Economics of nature utilization: energetics and steady development of society
  • Date submitted
    2008-11-23
  • Date accepted
    2009-01-30
  • Date published
    2009-12-11

The estimate of the utilization’s efficiency of the production waste products, which appeared as a result of the preservation of the environment measures

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Nowadays the problems of the stable growth of mineral and source of raw materials and fuel and energy complex industries are attached great importance to, since it influences the country social-economic condition. In its turn the development of the mining industry requires opening up new lands, which are especially vulnerable to different kinds of anthropogenous and technogenous factors. The changes in the state of economic system have excluded the lowering expenditure by the economy of the production scale. The typical features of a new economy became the progress of free competition and intensive demonopolization. At the same time for the mining industry it is significant that large-scale enterprises should be the foundation of many cities economies of the Russian Federation. For the way out of a system crisis it is necessary to change the strategy – to alter not only the condition of the system, but its management. The formation of the mining complexes permits to use sources of raw materials of the exploited deposits in the proper way, to process waste products of the basic production into the commodity output, to raise the efficiency and cut costs of the preservation of the environment measures from concentration waste products, exhaust solutions, gases, warm water harmful influence on the environment. The practical use of the production waste products of the mining complexes is unprofitable and makes sense only because of its opportunity partially compensating the aggregate investments for the preservation of the environment. The estimate of the utilization s efficiency of the production waste products has made.

How to cite: Pronin E.M. The estimate of the utilization’s efficiency of the production waste products, which appeared as a result of the preservation of the environment measures // Journal of Mining Institute. 2009. Vol. 184 . p. 257-263.
Economical aspects in the developments оf fuel & energy complex
  • Date submitted
    2008-11-02
  • Date accepted
    2009-01-05
  • Date published
    2009-12-11

Assessment the effectiveness of energy consumption in the enterprises of the main transport of gas

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This study proposed a new comprehensive approach to assessing energy efficiency in the enterprises of the main transport of gas, which allows you to explore in detail the consumption of energy resources of each equipment, consumption of resources in technological operations and the creation of favorable conditions, to assess the state of accounting systems and the organization works to improve the efficiency use of energy.

How to cite: Konoplev T.F. Assessment the effectiveness of energy consumption in the enterprises of the main transport of gas // Journal of Mining Institute. 2009. Vol. 184 . p. 138-143.
Professional rhetoric: theory - practice - teaching methods
  • Date submitted
    2004-07-22
  • Date accepted
    2004-08-04
  • Date published
    2005-01-11

Information-communicative approach in studying the culture of speech behavior of a teacher.

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The article describes the use of information-communicative approach in the study of speech behavior of teachers. From this position, speech behavior is considered as a type of personal communication, in the process of which information transfer is carried out.

How to cite: Sokolova Y.G. Information-communicative approach in studying the culture of speech behavior of a teacher. // Journal of Mining Institute. 2005. Vol. 160 № 2. p. 69-70.