Improvement of informational technologies in ecology

Purpose. The present paper aims to enhance methodology for determining the safety and stability parameters of room mining systems with backfilling of the mined-out area when mining uranium ores in underground mines of the State Enterprise “Skhidnyi Mining and Beneficiation Plant” (SE “SkhidGZK”). Methods. The analytical research method used in the presented paper includes the analysis of previous relevant instructions and reports on the research performed at the SE “SkhidGZK”, as well as publications on the subject, operational geological survey documentation containing monitoring data on the stress-strain state of the rock mass surrounding the formed cavities and the actual state of the mined-out blocks in all underground mines of SE “SkhidGZK”. Findings. The research performed enables development of a new instruction for determining the safety and stability parameters of the room systems with backfilling when mining uranium ores in the SE “SkhidGZK” underground mines. Based on the developed new instruction, the stability of outcrops in mined-out rooms has been calculated, considering the actual time of their life. The obtained parameters fully correspond to actual stability of rooms in blocks of all underground mines. This indicates that the new instruction is more advanced as compared to the current Instruction and its implementation will contribute to mine safety enhancement. Originality. The increased depth of mining uranium ore in the SE “SkhidGZK” underground mines and the increase in lifetime of mined-out rooms require regular adjustment of the methodology for determining their safety and stability parameters. Based on the accumulated production experience, the observations conducted and a thorough analysis of the actual state of cavities, new and adjusted current dependences have been obtained that more accurately consider the impact of both determined factors and those unprovisioned in the current Instruction for determining the safety and stability parameters of rooms. Practical implications. The advanced methodology for determining the safety and stability parameters of room systems in comparison with the methodology described in the current Instruction at the “SkhidGZK” underground mines provides higher accuracy when determining the design parameters of rooms in the stoping blocks and greater reliability of predictive stability of both individual outcrops and rooms in general.

Section: Research and Publications Analysismentioning

confidence: 99%

Methodology enhancement for determining parameters of room systems when mining uranium ore in the SE “SkhidGZK” underground mines, Ukraine

Stupnik¹,

Kalinichenko²,

Fedko³

et al. 2022

“…According to the Subsoil Legislation, despite type of ownership, all the organizations, engaged in geological studies, should provide reliable geological structure of bowels and determination of both quantity and quality of the main and associated minerals as well as their useful components [9]. Accurate assessment of the quality and spatial conditions of the resource occurrence favours rational subsoil use and protection [10]- [13].…”

Section: Introductionmentioning

confidence: 99%

Modelling mineral reserve assessment using discrete kriging methods

Malanchuk,

Moshynskyi,

Khrystyuk

et al. 2024

Purpose.Develop an efficient assessment model for amber placers within the analyzed block involving its content in the samples taken inside the block as well as out of it. Methods. To obtain results, a complex of scientific procedures has been applied consisting of system analysis; generalization; mathematical statistics; mathematical, perfect, and psychical modelling; field experiment; and forecasting. Findings. Methods to assess amber placer reserves have been substantiated. The potential of discrete kriging has been involved inclusive of the search for the best evaluation of amber content within the analyzed block taking into consideration the mineral percentage in the samples taken inside the block as well as out of it. Originality. The research has helped understood that the discrete kriging results help assess average amber content within the square and curvilinear zones tending to the central well (in terms of amber percentage) both in the central well and in wells of the first and second contact zones. Practical implications.Identification of the most efficient technique, assessing amber reserves, improves forecasting reliability of the resources with minimal cost.

“…The coal-mining industry in many countries of the world ensures the energy and raw material independence of mining countries [1]- [3]. This determines the particular relevance of the problem of ensuring the stability of mine workings, with the help of which coal reserves are mined [4], [5].…”

Section: Introductionmentioning

confidence: 99%

Ensuring a safe geomechanical state of the rock mass surrounding the mine workings in the Karaganda coal basin, Kazakhstan

ZHOLMAGAMBETOV¹,

Khalikova²,

Demin³

et al. 2023

Purpose. The research purpose is to determine the instability zones in the host rocks and the dynamics of propagation of active fracturing zones to ensure the stability of the rock mass surrounding the mine workings. Methods. The research uses a set of analytical and experimental studies to determine the dynamics of the deformation process development in the coal-rock mass surrounding the mine workings. Mathematical modeling of the stress-strain state of the rock mass surrounding the active extraction workings is performed using the numerical method of finite elements in modern AN-SYS, Mergel and KMS-III software products. Findings. The influence has been studied of the mine working section shape and the coal seam dip angle on the value of the maximum stresses that arise in the rock mass when the mine working is fastened with the roof-bolt support. The instability zones in the host rocks and the dynamics of propagation of active fracturing zones have been determined both ahead of the front of the conducted mine working and on its sides for rocks of different strength. Originality. For the conditions of the Karaganda coal basin, the dependence of a change in the development of conventional inelastic deformation zones (CIDZ) on the host rock strength has been revealed. The influence of the coal seam dip angle on the dynamics of stratifications around preparatory working has also been substantiated. In addition, new data have been obtained on the influence of the roof rock strength on the stratification of the rock mass surrounding the mine working. Practical implications. By determining instability zones in the host rocks and the dynamics of propagation of active fracturing zones, it is possible to control geomechanical processes in the border rock mass of a mine working and influence it in order to prevent the occurrence of negative rock pressure manifestations. The data obtained are the basis for the development of recommendations on the use of roof-bolting technology for fastening extraction workings to ensure their stability and reduce the cost of their operation.