Abstract
This study numerically examines the evolution of the stress and displacement fields of rock sur-rounding an oblique normal fault in the longwall working face of a mine. The aim is to determine the law of activation of an abnormal geological body containing coal and rock mass and to provide timely warnings of geological hazards, such as coal and gas bursts, rock bursts, and flooding during coal mining. A high-precision microseismic monitoring system was used to monitor the activation of and damage to the rock surrounding the mine. The results of numerical simulations coupled with those of microseismic monitoring showed that the coal and rock mass near the fault and goaf was situated in an area of high stress, with a high frequency and energy of microseismic events, wherein changes in the displacement of the roof were more significant when the working face was pushed to the fault layer. The combined analysis provides information on the activation of rock surrounding the coal mine and can be used to provide early warnings of mining accidents. The results provide a reference for the safe mining of the working face and technical guidance for the design parameters of pressure relief holes.
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Acknowledgments
We would like to express our sincere thanks to the school and the enterprise for providing us with support and great help for the completion of this paper. We would like to thank the members of the research team for their help in writing this paper. Thanks also go to Bayan Gaole Coal Mine for data support, the National Natural Science Foundation for project support, and the editorial de-partment teachers and reviewers for their comments.
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This work was supported by the National Natural Science Foundation of China (No. 52104157).
Author Biography
Liu Weijian (1977-), Male, Heze city, Shandong Province, Associate Professor, PhD, His research interests include Rock mechanics, Prevention and control of rockburst, Consolidation and water stopping of fractured rock mass,Microseismic monitoring.
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Liu, Wj., Hou, Mj., Dong, Ss. et al. Rock burst prevention and control of multifield coupling in longwall working face. Appl. Geophys. 21, 119–132 (2024). https://doi.org/10.1007/s11770-023-1013-3
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DOI: https://doi.org/10.1007/s11770-023-1013-3