Dependence of the mined ores quality on the geological structure and properties of the hanging wall rocks

Petlovanyi, Мykhailo; Ruskykh, Vladyslav; Zubko, Serhii; Medianyk, Volodymyr

doi:10.1051/e3sconf/202020101027

Cited by 15 publications

(12 citation statements)

References 31 publications

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“…The reversing process occurs through a reverse pipeline. In this case, the gas discharging pipeline valve ( 14) is closed, the valves (15) and (12) are open.…”

Section: Resultsmentioning

confidence: 99%

“…In fact, due to the lost access to the main oil and gas fields on the Black Se a shelf and a significant part of the coal deposits in the Eastern Donbass, restructuring of mines and reducing the cost of produced coal is an extremely urgent and strategic task. The mining industry prospective development is impossible without the introduction of innovative technical and technological solutions: modern approach for mining field planning [3][4][5] backfilling of gob area [6][7][8][9], reclamation and recultivation processes [10][11][12], control of mine ventilation [13][14][15], geomechanical stydy of rock mass behaviour based on rock properties stydy [16][17][18][19], ecological and environmental management [20,21].…”

Section: Introductionmentioning

confidence: 99%

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Synergistic approach as an innovative basis for obtaining a natural gas substitute

et al. 2021

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This paper studies the key problems of mining enterprises activity, which is mainly based on monofunctionality. A synergistic approach is described, which is a constituent basis for perspective performance of coal mines. The possibilities for profile reorientation of the coal mine operation as an enterprise for obtaining a natural gas substitute are analysed. The design peculiarities of a laboratory setup for studying the coal gasification processes (carbonaceous feed, various types of waste, etc.) are described that will form new approaches to implementation of the pilot units for producing the natural gas substitutes on the territory of coal mining enterprises, and combine them into a single mine technological chain. The developed setup, aimed to study the gasification processes, makes it possible to substantiate and determine the parameters of the carbonaceous feed gasification technology for obtaining the end product as a natural gas substitute.

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“…The reversing process occurs through a reverse pipeline. In this case, the gas discharging pipeline valve ( 14) is closed, the valves (15) and (12) are open.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synergistic approach as an innovative basis for obtaining a natural gas substitute

et al. 2021

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“…Based on statistical data, the average undercutting value in the faces is 0.24 m or 22.8% of the extracting seam thickness, and in some cases in mines it reaches 0.3-0.4 m. High undercutting value (0.32 m) is demonstrated in Figure 2, which shows a section drawing of one of the stope faces in the Blahodatna mine. Undercutting of the host rocks leads to mixing the broken coal with the rock and deterioration of its quality characteristics [38]- [40].…”

Section: Methodsmentioning

confidence: 99%

Research into balance of rocks and underground cavities formation in the coal mine flowsheet when mining thin seams

Petlovanyi¹,

Malashkevych²,

Sai³

et al. 2020

Min. miner. depos.

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Purpose. Study the movement of waste rock flows in the coal mine technological system and determine the balance of rocks and underground cavities formation from the perspective of the current mining operations development in order to assess the possibility of leaving the rock in the underground area. Methods. Based on the rank order of the Western Donbass mines, a coal mine has been chosen as the object of research in terms of maximum output and ash content. An algorithm is proposed for analytical studies of determining the rock outcrop in the course of stope, drifting and repair operations, as well as the prospective volumes of underground cavities for placing the formed waste rocks per a calendar year. The algorithm is based on the actual state of mining operations and the indicators of the stope and drifting faces of the mine, as well as the achieved modern mining-engineering parameters of the coal seams mining. Findings. It has been revealed that the main supply of waste rocks to the surface occurs as a result of stope operations with rock undercut -39% and underground mine workings -33%. It is proposed to differentiate all waste rock outcropped after mining operations into 2 categories: difficult to dispose of and prospective for disposal. It has been found that underground cavities have enormous potential for stockpiling of all waste rocks, the volume of which is by 2.8-4.8 times higher than the rock volume. It has been revealed that the most rational balance of waste rocks and cavities for leaving the rock in the mine is formed along the С 10 t seam. It has been determined that the full-fledged placement of rocks is limited by the scheduling peculiarities of mining the reserves along the seams, which are made for the complete cave-in technology of coal mining. Originality. For the first time, for one of the Western Donbass mines, the balance of formed waste rocks and potential underground cavities, dynamically changing in time and space, has been determined. Practical implications. The results obtained are useful for engineering new spatial planning solutions for the optimal development of mining operations with the maximum possible rocks stockpiling in the underground area of mines.

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“…Geomechanical modeling is a sequential process of determining the mechanical properties of the rock and its response to impacts during the deposit mining process [54]- [56]. In this paper, the authors study the development of three-dimensional geomechanical models for mining the deposits by surface method, which are based on the results of calculating the stability factor of the open-pit walls.…”

Section: Introductionmentioning

confidence: 99%

Substantiating the rock mass control parameters based on the geomechanical model of the Severny Katpar deposit, Kazakhstan

Tolovkhan¹,

Demin²,

Amanzholov³

et al. 2022

Min. miner. depos.

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Purpose. The research purpose is to develop a geomechanical model for ensuring the safety of mining operations by determining the optimal slope angles and probabilistic assessment of the stability of the open-pit walls. Methods. Three-dimensional geomechanical models for surface mining of deposits have been developed based on calculations of the stability factor (safety factor SF) of the open-pit walls in the Rocscience program to determine the rock mass stress-strain state at the end of mining using the finite element method. The geological wireframe model (GWM) has been built on the basis of the available geological sections, horizon plans and the results of the engineering-geological surveys using the Surpac geoinformation system. Findings. Strength reduction factor (SRF) has been determined taking into account the physical-mechanical properties of rocks that constitute the near-wall mass. An assessment of the stability of walls according to the selected geological sections is given, taking into account the projected contour of the Severny Katpar open-pit walls. The calculation of the projected contour stability of the open-pit walls by several different methods has revealed that the open-pit walls are generally stable. The open-pit parameters at the end of mining have been determined. Originality. For the first time, it has been determined that in the Southern and South-Western area of the Severny Katpar open-pit wall in the horizons +700…+400, there is a decrease in SF from 1.18 to 1.41 due to the predominant occurrence of siltstones and tectonic disturbances of the walls. Practical implications. The mathematical calculation results of the stability of the projected contour walls in the Severny Katpar open pit have been generalized. In addition, a geological and structural wire-frame model of the deposit has been developed, which makes it possible to ensure the safety of mining operations in the open pit.

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Dependence of the mined ores quality on the geological structure and properties of the hanging wall rocks

Cited by 15 publications

References 31 publications

Synergistic approach as an innovative basis for obtaining a natural gas substitute

Synergistic approach as an innovative basis for obtaining a natural gas substitute

Research into balance of rocks and underground cavities formation in the coal mine flowsheet when mining thin seams

Substantiating the rock mass control parameters based on the geomechanical model of the Severny Katpar deposit, Kazakhstan

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