Study on Stress Zoning Characteristics and Rock Burst Prevention and Control of Gob-Side Coal Body Based on Microseismic and Numerical Simulation

Shijia Liu

doi:10.62051/

Authors

Shijia Liu

DOI:

https://doi.org/10.62051/

Keywords:

Gob-side coal body; Mining-induced stress distribution; Microseismic; Rock burst.

Abstract

Rock burst is a typical dynamic disaster in coal mining, and its occurrence is closely related to the distribution of mining-induced stress. Taking the N2107 working face of Yuwu Coal Mine as the research object, this paper systematically studies the stress distribution and evolution law of the gob-side coal body during the retreat mining process by comprehensively applying theoretical analysis, in-situ stress monitoring, microseismic data inversion, and FLAC3D numerical simulation. The results show that under the influence of mining activities, the gob-side coal body can be divided into three typical zones: the decompression zone, the stress concentration zone, and the original stress zone. The peak of the stress concentration zone is located approximately 150 m from the gob-side of the working face, and the range of the decompression zone is about 35 m. The microseismic b-value inversion results are consistent with the conclusions of stress monitoring and numerical simulation, verifying the reliability of the stress zoning. Based on the characteristics of stress evolution, rock burst prevention measures are proposed, including implementing pressure-relief boreholes in the stress concentration zone, optimizing support parameters in the decompression zone, and combining real-time microseismic b-value monitoring for risk early warning. This study provides theoretical basis and technical support for safe and efficient mining in deep coal mines.

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