Prospects for the Deposits Development in Ossetia

Голик, В.И.; DMITRAK, Yuri; Gabaraev, O.Z.; ZASSEEV, Igor

doi:10.21177/1998-4502-2021-13-1-103-111

Cited by 2 publications

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“…The more intensive the mining of the stope, the more outcrops can be expected. Mining-technical safety of mining the complex-structure deposits is achieved through the implementation of integrated methods and technical means for measuring the rock mass stress state on the basis of geomechanical monitoring [45]- [47]. Thus, the main negative impact of mining technology on the environment and humans is the high cost for preserving the daylight surface and ensuring the life activity of the population living in the zone of influence of mining facilities, as well as the allocation of large plots of land, especially fertile, etc.…”

Section: Advanced Research Directionsmentioning

confidence: 99%

Substantiation of mining-technical and environmental safety of underground mining of complex-structure ore deposits

Lyashenko¹,

Andreev²,

Dudar³

2022

Min. miner. depos.

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Purpose. Substantiation of mining-technical and environmental safety of underground mining of complex-structure ore deposits based on the study of a rock mass stress-strain state (SSS), as well as determining the safe parameters of stopes for specific mining-geological conditions and patterns of rock pressure propagation in various environments. Methods. To assess the improvement of mining-technical and environmental safety of mining operations, the research includes theoretical generalizations with the use of mathematical statistics, physical and mathematical modeling, performing calculations, as well as technical and economic feasibility, laboratory and full-scale experimental studies, industrial tests in mine conditions and on the earth's surface in the zone of blasting influence, based on the standard and new methods. Findings. A functional interrelation between the rock mass SSS value and the number of impulses (destruction sounds) per minute, characterizing its structural (а) and strength (b) properties, is proposed, which is described by a curvilinear dependence of the type y = axb and allows to quickly determine the stable parameters of stopes. Assessment and prediction are made for various forms of rock pressure manifestation, based on the stress concentration coefficient within 0.91 Kv 0.70, taking into account the conditions of the elastic behavior of rocks. The value of = 0.0002-0.0003 is taken as permissible relative deformation, which ensures both mining-technical and environmental safety, as well as the rock mass stability during repeated blasting operations. Originality. A classification of the rock mass SSS has been developed depending on the direction of the maximum stresses relative to the mine working location, the level of the rock mass stress state and the mechanism of rock pressure manifestation (η), as well as the category of rock-bump hazard. In particular, the rock mass with the values in the range oof 0.12 < η ≤0.2; 0.2 < η ≤ 0.3; 0.3 < η ≤ 0.5 and η > 0.5 are classified as non-rock-bump hazardous and belong to III, II, and I hazard categories, respectively. Practical implications. To substantiate the safe parameters of stopes based on the results of multi-year research into underground mining of complex-structure deposits, depending on the rock mass properties, a graphical-analytic method (nomographic charts and calculation formulas) is recommended. These parameters are determined for highly fractured, medium fractured and weakly fractured rock mass with its horizontal outcropping to the surface. Using this method, the Instruction on the Geomechanical Substantiation of the Safe Mining of the Reserves at the Skhidnyi Hirnycho-Zbahachuvalnyi Kombinat, DP (SE VostGOK), Ukraine, has been developed.

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Section: Advanced Research Directionsmentioning

confidence: 99%

Substantiation of mining-technical and environmental safety of underground mining of complex-structure ore deposits

Lyashenko¹,

Andreev²,

Dudar³

2022

Min. miner. depos.

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“…The study of the processes of sorption purification of contaminated water was carried out using solutions, the composition of which, in terms of the main anionic components, corresponded to the composition of underground waters of the storage facility for liquid waste of uranium ore processing at the State Enterprise VostGOK (Zhovti Vody, Ukraine) [33]. This ensures a decrease in the degree of metal contamination of ground and surface waters, soils and sediments, including the main Michurynske fault and an anti-seepage curtain (constructed using technology, for example, a «wall in the ground») [34,35].…”

Section: 3mentioning

confidence: 99%

Evaluation of efficiency and environmental safety of leaching metals from ore: ways of development and prospects

Lyashenko¹,

Khomenko

Chekushina

et al. 2021

TAPR

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The object of research is traditional mining technologies and technical means in combination with underground block leaching (UBL) of metals from rock ores with their preliminary crushing with explosives in installations mounted in mine workings. One of the most problematic areas is the difficulty of achieving a given crushing quality, as well as the required height of ore storage in the chamber for the subsequent leaching of metals and a loosening factor, taking into account the control of the energy of explosive destruction of rock ores. The study used: – data from literary sources and patent documentation in the field of technologies and technical means for UBL of metals from ores in energy disturbed massifs, substantiation of technological parameters of operational blocks; – laboratory and production experiments; – physical modeling of metal extraction from ores from the average linear size of a piece of blasted ore. Analytical studies, comparative analysis of theoretical and practical results using standard and new methods were carried out with the participation of the authors. It was found that the most intensive infiltration leaching occurs when the size class of ore lumps is –100+0 mm. Metals are extracted from fractions –200+100 mm less intensively and for a longer time. To neutralize and flush the spent ore mass, it is recommended to treat it with lime solution and mine water through wells for supplying leaching solutions (irrigation system). The protection of the hydrogeological environment is carried out by silting the bottom of the chamber for collecting productive solutions with clay solution and by constant monitoring of mine water pollution in the zone of UBL influence. On the basis of the positive results obtained from the study and implementation of technologies for UBL of metals from rock ores during the development of block 5–86, in accordance with the recommendations issued, the same approach was used for blocks 5–84–86 and 5–88–90, as well as industrial experimental block 1–75–79. Due to the involvement in the production of substandard ores, the raw material base for the extraction of metals, at the operating mines, can be increased by 1.4–1.6 times. The research results can be used in underground mining of ore deposits of complex structure in Ukraine, the Russian Federation, the Republic of Kazakhstan and other developed mining countries of the world.

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Prospects for the Deposits Development in Ossetia

Cited by 2 publications

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Substantiation of mining-technical and environmental safety of underground mining of complex-structure ore deposits

Substantiation of mining-technical and environmental safety of underground mining of complex-structure ore deposits

Evaluation of efficiency and environmental safety of leaching metals from ore: ways of development and prospects

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