In order to investigate the factors inducing mine seismicity and reduce the frequency and degree of mine seismicity, this study focuses a coal mine in the Ordos region. By integrating field evaluation, theoretical analysis, scheme design, in-situ measurement, and industrial-scale testing, the mechanism of mining-induced seismicity triggered by thick-hard roof fracture was analyzed, and a cooperative pressure-relief and seismicity-reduction technology combining “hydraulic fracturing in roadway roof, directional long-hole hydraulic fracturing, and surface deep-hole blasting” was proposed. The research results show that the inducing factors of mining-induced seismicity in thick-hard roof working faces include mining depth, geological structures, lithological variations, advance rate, periodic weighting, etc. When multiple factors overlap, the frequency of mining-induced seismicity increases significantly. After implementing the pressure-relief technology, the average periodic weighting interval of the working face was reduced from 17.32 m to 14.81 m, a decrease of 14.49%. The monthly frequency of microseismic events increased from 185 to 1 902, with small-energy microseismic events accounting for 73.2%, exhibiting a “high-frequency, low-energy” distribution pattern. The pressure-relief and seismicity-reduction technology demonstrated excellent effectiveness, significantly lowering the risk level of mining-induced seismicity. The research conclusions provide a reference for mine earthquake control under similar conditions.
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