Abstract
The results of a comprehensive geomechanical prediction of the state of the host rocks in the vicinity of the development working when mining the excavation column of longwall in the vicinity of the rock inrush in the conditions of one of the mines of Western Donbas are presented. A numerical simulation of the size and shape of the rock inrush zone and a comparison of the obtained results with the full-scale mine observations were carried out using the theory of fractals and rock damageability.
Highlights
IntroductionWorks in mines are extremely complicated by the lack of sufficient knowledge about the structure and properties of rocks, which are often saturated with gas and often flooded, tectonically broken and are under high compressive stresses, displacement processes during mining operations
Works in mines are extremely complicated by the lack of sufficient knowledge about the structure and properties of rocks, which are often saturated with gas and often flooded, tectonically broken and are under high compressive stresses, displacement processes during mining operations.Since coal reserves suitable for mining are exhausted, the rationalization of technical solutions aimed at reducing forced coal losses in various types of pillars are topical
This methodology has been developed by leading domestic mining scientists in relation to the mining and mining-technical conditions for mining coal deposits by underground mining in Ukraine. This methodology is implemented in the form of a software-technological complex “Technology of strategic planning of mining development”, through which we choose the rational technological parameters while solving a specific mining engineering task [3]. This Technology has been successfully tested in all coal-mining areas - from Zakhidnyi Donbas with its unique mining and geological conditions, where host rocks have a weak degree of metamorphism, unstable, flooded, cracked, etc., to Skhidnyi Donbas, the conditions of which are characterized by a strong degree of host rocks metamorphism, a wide range of stability, a large depth of working, as well as high gas-richness, etc
Summary
Works in mines are extremely complicated by the lack of sufficient knowledge about the structure and properties of rocks, which are often saturated with gas and often flooded, tectonically broken and are under high compressive stresses, displacement processes during mining operations. This Technology has been successfully tested in all coal-mining areas - from Zakhidnyi Donbas with its unique mining and geological conditions, where host rocks have a weak degree of metamorphism, unstable, flooded, cracked, etc., to Skhidnyi Donbas, the conditions of which are characterized by a strong degree of host rocks metamorphism, a wide range of stability (from unstable to hard-to-crush), a large depth of working (over 1000 m), as well as high gas-richness, etc This technology makes it possible, at the design stage of mining, to carry out complex geomechanical forecasting of changes in the stressstrain state of the coal-rock massif and select rational technological parameters for mining that provide the maximum production and economic return for specific conditions [4]. This approach tests this methodology in solving practical mining engineering problems
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