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dilatation-wave impact

Geotechnical Engineering and Engineering Geology
  • Date submitted
    2024-05-17
  • Date accepted
    2025-03-27
  • Date published
    2025-03-27

Determination of impact hazard potential of rocks in the Norilsk Industrial Region

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The deeper the mineral deposits developments are, the worse the mining and geological conditions become. Significant growth of stress level in the rock mass contributes to possible manifestation of rock pressure in dynamic form. The resulting task of assessment of rock impact hazard is closely related to the task of obtaining more accurate results of compression tests of samples in rigid or servohydraulic test presses using graphs of their full deformation. This approach requires special expensive equipment, considerable time resources, and sufficient core material. Therefore, it is important to have an approach that allows to assess the propensity of rocks to brittle fracture with research methods simple enough not to result in the loss of quality and reliability of the obtained results. This paper presents the results of laboratory tests of rocks from the Norilsk Industrial Region to determine their tensile and compressive strengths. Test methods involved both domestic and foreign standards for determining the value of the brittleness coefficient. The impact hazard potential of rocks was determined using the Kaiser criterion. It is found that the tested lithological types (rich sulfide ores, hornblende, disseminated ores, and gabbro-dolerite rocks), with the exception of anhydrite, have a low impact hazard potential.

How to cite: Gospodarikov A.P., Zatsepin M.A., Kirkin A.P. Determination of impact hazard potential of rocks in the Norilsk Industrial Region // Journal of Mining Institute. 2025. p. EDN UOHOQP
Geotechnical Engineering and Engineering Geology
  • Date submitted
    2024-04-24
  • Date accepted
    2024-09-24
  • Date published
    2024-11-12

Study and justification of the combination of beneficiation processes for obtaining flake graphite from technogenic carbon-containing dusts

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The most important task of modern production development is to provide the mineral and raw materials sector of the economy with resources included in the list of strategic raw materials, including flake graphite. In addition to natural raw materials, the source of its obtaining can be metallurgical production wastes not involved in processing. Development of metallurgical dust beneficiation technology will solve the problem of obtaining high-purity flake graphite with a crystal structure close to ideal and in demand in the production of high-tech materials. It will allow creating a renewable raw material base of graphite and utilising metallurgical production wastes. The research included the study of dust beneficiation by coarseness, magnetic and flotation methods, the influence of dust disintegration processes on beneficiation indicators. Based on the established technological properties of the components of dusts, magnetic, flotation and gravity beneficiation methods can be applied for their separation in different sequence. It is shown that dusts from different sites have different enrichability by these methods, and it should be taken into account when developing a complex technology of their processing. The degree of beneficiation increases in a row of dusts from the blast furnace shop (BF) – electric steel smelting shop (ESS) – oxygen-converter shop (OCS). The method of grinding has a significant influence on the separation indicators – at dry grinding in a centrifugal-impact mill with subsequent pneumatic classification the quality of graphite concentrates increases by 22.7 % of carbon for BF dust and by 13.48 % of carbon for ESS dust. OCS dust beneficiation indicators are high at coarse grinding with steel medium – mass fraction of carbon 96.1 %.

How to cite: Orekhova N.N., Fadeeva N.V., Musatkina E.N. Study and justification of the combination of beneficiation processes for obtaining flake graphite from technogenic carbon-containing dusts // Journal of Mining Institute. 2024. Vol. 269 . p. 777-788. EDN UNUYXS
Geotechnical Engineering and Engineering Geology
  • Date submitted
    2023-04-13
  • Date accepted
    2023-10-25
  • Date published
    2025-02-25

Assessment of the ecological state of aquatic ecosystems by studying lake bottom sediments

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The article presents the results of coupled palynological and geochemical studies of five various genesis lakes, located along the route of the expedition “In the footsteps of Alexander von Humboldt in Siberia, Altai and Eastern Kazakhstan”, dedicated to the double anniversary: the 190th anniversary of the expedition across Russia of the famous scientist and his 250th birthday. A geochemical analysis of water and bottom sediments of Ik Lake (Siberia), Lakes Kolyvanskoe and Beloe (Altai), Lake Bezymyannoe (Kazakhstan) and Nagornyi Pond (Altai) was carried out. Based on their results an assessment of studied lakes ecological state was given through single and integral criteria. A high level of pollution was noted for Nagornyi Pond and Lake Bezymyannoe, which is caused by a significant technogenic load from nearby mines. This is consistent with the data of palynological research. The aquatic ecosystems of Lakes Kolyvanskoe and Beloe are characterized by a satisfactory ecological situation, but they experience an increased recreational load. The results of spore-pollen analysis and analysis of non-pollen palynomorphs showed the low ability of these lakes to self-healing. The most favorable ecological state and high self-cleaning capacity were noted for Lake Ik, which is consistent with the data of palynological studies. It is being confirmed with the results of palynological studies. It was therefore concluded about the ability to make a quick assessment of the aquatic ecosystems’ ecological state by studying lakes using coupled palynological and geochemical analysis.

How to cite: Chukaeva M.A., Sapelko T.V. Assessment of the ecological state of aquatic ecosystems by studying lake bottom sediments // Journal of Mining Institute. 2025. Vol. 271 . p. 53-62. EDN IXRSRC
Modern Trends in Hydrocarbon Resources Development
  • Date submitted
    2022-05-26
  • Date accepted
    2022-11-17
  • Date published
    2022-12-29

Renovation method of restoring well productivity using wavefields

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A stagewise theoretical substantiation of the renovation vibrowave method of influencing the near-wellbore zone of reservoir for restoring well productivity is presented. The area of treatment by the proposed method covers the reservoir with a heterogeneous permeability with fractures formed by fracking. In this method a decrease in concentration of colmatants occurs due to a change in direction of contaminants migration. Under the influence of pressure pulses, they move deep into the reservoir and disperse through the proppant pack. The results of mathematical modelling of the propagation of pressure wave and velocity wave and the calculations of particles entrainment in wave motion are presented.

How to cite: Shatalova N.V., Apasov T.K., Shatalov A.V., Grigoriev B.V. Renovation method of restoring well productivity using wavefields // Journal of Mining Institute. 2022. Vol. 258 . p. 986-997. DOI: 10.31897/PMI.2022.108
Metallurgy and concentration
  • Date submitted
    2022-02-22
  • Date accepted
    2022-05-11
  • Date published
    2022-11-03

Scientific substantiation and development of innovative processes for the extraction of zirconium and rare earth elements in the deep and comprehensive treatment of eudialyte concentrate

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Based on a package of modern analysis methods, the influence of various acids and energy effects on the morphology, elemental composition, structural and chemical transformations of the mineral surface, and the efficiency of eudialyte concentrate leaching was studied. The mechanism and the optimal conditions and specific features of the destruction of eudialyte and rock minerals and the extraction of zirconium and REE under the influence of various acids, powerful nanosecond pulses, dielectric barrier discharge, electrochemical processing, mechanochemical activation and ultrasound were revealed. The mechanism of formation and the optimal conditions for the dispersion of silica gel, depending on the methods and parameters of energy effects, was theoretically and experimentally substantiated. A combined three-stage circuit of nitric acid leaching of eudialyte concentrate with ultrasonic treatment of the suspension, providing 97.1 % extraction of zirconium and 94.5 % REE, were scientifically substantiated and tested. The conditions for the selective deposition of zirconium and REE were theoretically and experimentally substantiated.

How to cite: Chanturiya V.A. Scientific substantiation and development of innovative processes for the extraction of zirconium and rare earth elements in the deep and comprehensive treatment of eudialyte concentrate // Journal of Mining Institute. 2022. Vol. 256 . p. 505-516. DOI: 10.31897/PMI.2022.31
Economic Geology
  • Date submitted
    2022-06-01
  • Date accepted
    2022-09-06
  • Date published
    2022-11-10

Impact of EU carbon border adjustment mechanism on the economic efficiency of Russian oil refining

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The carbon border adjustment mechanism (CBAM) leads not only to the expected environmental changes, but also to the transformation of market environment. The study estimates the losses of the oil refining sector from the introduction of CBAM for the export of oil products from Russia to the countries of the European Union. An approach to assess the impact of CBAM on the cost of oil products has been formed and the mechanisms of its impact on the economy of Russian oil refineries have been identified. The study was carried out on the basis of actual data on the volume of greenhouse gas emissions in accordance with the current rules of the European emissions trading system. Decomposition of assessments of the CBAM impact was carried out into direct and indirect effects, as well as the effect of adaptation. It is shown that with the introduction of the CBAM mechanism, the prices of oil products in the domestic market will be determined not only by the logistical factor, but also by the requirements for environmental friendliness of oil refining. The introduction of CBAM will have a significant impact on the economics of oil refining, including refineries that do not export to the EU. The total impact of CBAM on the economy of Russian oil refineries will be about 250 mln dollars.

How to cite: Ulanov V.L., Skorobogatko O.N. Impact of EU carbon border adjustment mechanism on the economic efficiency of Russian oil refining // Journal of Mining Institute. 2022. Vol. 257 . p. 865-876. DOI: 10.31897/PMI.2022.83
Modern Trends in Hydrocarbon Resources Development
  • Date submitted
    2021-11-10
  • Date accepted
    2022-05-25
  • Date published
    2022-12-29

Predicting the permeability of the near-bottomhole zone during wave impact

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The research reveals that during selection of a method to increase oil recovery it is necessary to take into account rheological features of fluid movement through the formation, effect of capillary forces and heterogeneity of reservoir properties of the productive formation in thickness and along the bedding. Low-frequency wave impact, which is used to increase production in oil fields, is considered. At low-frequency impact new fractures appear and existing fractures in rocks increase in size. The greatest increase in porosity and permeability of rocks occurs at an impact frequency up to 10 Hz. Dynamics of oscillation amplitude during wave's movement in saturated porous medium is studied in the paper: essential attenuation of amplitude occurs at distance up to 1 m from borehole axis. With increase of frequency from 1 to 10 Hz the intensity of amplitude's attenuation decreases. The technology was tested on a well in Perm region (Russia). The actual permeability value was 50 % higher than the predicted value. According to the results of hydrodynamic investigations processing, it was noted that the greatest increase of permeability took place near the wellbore, while away from the wellbore axis permeability remained almost unchanged. In order to refine the mathematical model for prediction of wave impact on rock permeability it is necessary to take into account interconnection of pore space structure, change of adhesion layer, as well as to study transfer of particles during vibration.

How to cite: Chengzhi Q., Guzev M.А., Poplygin V.V., Kunitskikh A.A. Predicting the permeability of the near-bottomhole zone during wave impact // Journal of Mining Institute. 2022. Vol. 258 . p. 998-1007. DOI: 10.31897/PMI.2022.59
Oil and gas
  • Date submitted
    2021-09-22
  • Date accepted
    2021-11-30
  • Date published
    2021-12-27

Possibilities for creating Russian high-tech bottomhole assembly

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Development of high-tech well electronic measuring systems is aimed at creating modern equipment: telemetry, well geophysical measurement equipment, the architecture of which is divided into basic (with measurement channels for gamma logging and inductive resistance) and advanced (with radioactive, acoustic, magnetic resonance and thermobarometric measurement channels, including azimuthal methods of investigation). Over-the-bit measurement modules, rotary steerable systems are being developed and channels for transmitting data to the surface are being improved. Vice versa, specialized surface equipment with highly integrated software is being created. Different measurement modules are manufactured by different companies, which creates uncertainties in the possibility of interfacing the manufacturers' measurement modules into a single well measurement system. The article presents an analysis of the readiness of Russian oil service companies to produce well and surface equipment for drilling Russian directional oil and gas wells, meeting modern requirements for accuracy, lifetime and operating conditions. The possibility of creating a fully Russian well high-tech equipment and the required resources, risks and measures to mitigate them when creating a modern well measurement system are considered.

How to cite: Zhdaneev O.V., Zaytsev А.V., Prodan Т.T. Possibilities for creating Russian high-tech bottomhole assembly // Journal of Mining Institute. 2021. Vol. 252 . p. 872-884. DOI: 10.31897/PMI.2021.6.9
Mining
  • Date submitted
    2020-05-25
  • Date accepted
    2020-06-11
  • Date published
    2020-12-29

Technological aspects of cased wells construction with cyclical-flow transportation of rock

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A high-performance technology for constructing cased wells is proposed. Essence of the technology is the advance insertion of the casing pipe into the sedimentary rock mass and the cyclical-flow transportation of the soil rock portions using the compressed air pressure supplied to the open bottomhole end of the pipe through a separate line. Results of mathematical modeling for the process of impact insertion of a hollow pipe into a soil mass in horizontal and vertical settings are considered. Modeling of the technology is implemented by the finite element method in the ANSYS Mechanical software. Parameters of the pipe insertion in the sedimentary rock mass are determined - value of the cleaning step and the impact energy required to insert the pipe at a given depth. Calculations were performed for pipes with a diameter from 325 to 730 mm. Insertion coefficient is introduced, which characterizes the resistance of rocks to destruction during the dynamic penetration of the casing pipe in one impact blow of the pneumatic hammer. An overview of the prospects for the application of the proposed technology in geological exploration, when conducting horizontal wells of a small cross-section using a trenchless method of construction and borehole methods of mining, is presented. A variant of using the technology for determining the strength properties of rocks is proposed. Some features of the technology application at industrial facilities of the construction and mining industry are considered: for trenchless laying of underground utilities and for installing starting conductors when constructing degassing wells from the surface in coal deposits. Results of a technical and economic assessment of the proposed technology efficiency when installing starting conductors in sedimentary rocks at mining allotments of coal mines are presented.

How to cite: Kondratenko A.S. Technological aspects of cased wells construction with cyclical-flow transportation of rock // Journal of Mining Institute. 2020. Vol. 246 . p. 610-616. DOI: 10.31897/PMI.2020.6.2
Electromechanics and mechanical engineering
  • Date submitted
    2018-05-03
  • Date accepted
    2018-07-07
  • Date published
    2018-10-24

Regularities of material destruction of the impactor in repeated single punch

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The technique and the results of experiments on the study of the laws of the process of the cone-shaped tip of a freely falling impactor made of 38HM, U8, H12MF steels, subjected to typical heat treatment and additionally treated with cold, when they apply multiple (up to 10000) single impacts on granite under conditions approaching hydraulic impactor peaks. To explain the processes, we used the values of stresses σ к , arising at the contact area of the impactor and the rock, calculated using the developed mathematical model. It has been established that the process of wear of an impactor with multiple single blows proceeds in three stages separated by critical values, , which correspond to the strength characteristics of the material of the impactor demonstrated in these dynamic conditions. With a small number of strokes (n ≤ n * ) and the small size of the blunting area (stage I interaction) values σ c exceed of steel and it is exposed to local destruction at the contact site, which is recorded as a significant loss of the impactor’s mass; with n * < n ≤ n ** (stage II) the resulting stresses are not enough to destroy the material, but it is enough for its plastic deformation, accompanied by the movement of metal from the central part of the contact area to the peripheral and the destruction of part of the deformed metal by rock; with n > n ** (stage III) arising σ к do not reach the level and the decrease in the mass of the impactor is determined by the resistance of the steel to abrasion by the products of rock destruction, displaced by the impactor from the well. The treatment of impactors from all tested steels with cold leads to an increase in their wear resistance; The total depth of the holes punctured by the cold-treated H12MF steel impactor at the time of the interruption of the rock penetration is four times higher than that of the 38HM steel impactor subjected to typical heat treatment.

How to cite: Bolobov V.I., Bin L.T. Regularities of material destruction of the impactor in repeated single punch // Journal of Mining Institute. 2018. Vol. 233 . p. 525-533. DOI: 10.31897/PMI.2018.5.525
Geotechnical engineering, powerengineering and automation
  • Date submitted
    2009-08-25
  • Date accepted
    2009-10-23
  • Date published
    2010-02-01

Mathematical model of impact energy pulse changes in «rock drill – rod – rock» system of rotary-percussion drill rigs

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This article describes the process of passing the impact energy through the connection of drilling composition. Based on the concept of impact energy transfer, created a mathematical model of impact energy pulse changes in the «rock drill-rod-rock» system of rotary-percussion drill rigs.

How to cite: Resheten S.A. Mathematical model of impact energy pulse changes in «rock drill – rod – rock» system of rotary-percussion drill rigs // Journal of Mining Institute. 2010. Vol. 186 . p. 133-135.
Hydrogeology, engineering geology
  • Date submitted
    2008-10-12
  • Date accepted
    2008-12-17
  • Date published
    2009-12-11

Principles of development of geological engineering and geological criteria for safe burial of low radioactive wastes in lower cambrian blue clays in the Leningrad region

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It is noticed that the chosen territory for nuclear-waste disposal in Lower Cambrian clay massif nearby Koporje of Leningrad region takes place in a tectonic zone. Lower Cambrian clays are considered as the block-fractured rock mass having a depth zone structure. The long radioactive irradiation of dark blue clays has led to transformation of their structure, physical-chemical and physical-mechanical properties, and also to activization of microbial activity. Nine criteria to the geoenvironmental and engineering geological characteristics allowing in a complex to estimate safety and reliability of a nuclear-waste disposal in clay formations on an example of dark blue clays are suggested.

How to cite: Dashko R.E. Principles of development of geological engineering and geological criteria for safe burial of low radioactive wastes in lower cambrian blue clays in the Leningrad region // Journal of Mining Institute. 2009. Vol. 183 . p. 187-195.