Abstract
A digital model of geomechanical processes in a structurally heterogeneous geo-massif with consideration for the influence of natural and technogenic forces was developed. Based on the results of numerical modeling, the regularities of stress change, convergence of roof and soil rocks, stability of coal pillars between production and development workings were revealed with an increase in the depth of development and the thickness of the interbed rocks within the excavation column of a coal mine.
Highlights
One of the key priorities in the production activities of coal mining enterprises is to ensure safe working conditions for workers while minimizing the risks associated with the process of underground coal mining
The main risks in underground coal mining are the occurrence of a potentially explosive concentration of methane, unpredictable seismic events and geodynamic phenomena resulting from an increase in the depth of development and the complication of mining and geological conditions
The complexity of mining and geological conditions is characterized by the following features: induced technogenic seismicity within the seismic geodynamic range of a group of mining enterprises; intense manifestations of dynamic phenomena in the form of rock bumps, sudden outbursts of coal, rock and gas with an increase in the development depth to 800 m, and natural methane content up to 30 m3/t; the negative impact on the operational stability of mine workings of the structural heterogeneity of the rock mass in the form of plicative and disjunctive geological disturbances, replacement of rock layers and coal seams
Summary
One of the key priorities in the production activities of coal mining enterprises is to ensure safe working conditions for workers while minimizing the risks associated with the process of underground coal mining. According to the results of geodynamic and morphological zoning, it was established [3,4,5] that the Erunakovsky geological and economic region is characterized by a complex tectonic structure with structural heterogeneity and the presence of a system of tectonic blocks bounded by regional fracture zones In this regard, in order to exclude a number of reassemblies of the treatment equipment and downtime of the working face when geological fractures of the rupture type are encountered, in practice, the extraction pillars are oriented along the disturbances
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