Research on correlation between mining speed and microseismicity in rock burst mining face

Lai Min; Zhang Lu; Lu Zelin; Xu Zihao

doi:10.19896/j.cnki.mtkj.2025.06.028

Abstract：Rock burst is prone to occur during high-speed or non-uniform speed mining in mining area.To reasonably control the min-ing speed of Yuangou Coal Mine in Shaanxi Province,taking the No.1012007 working face of mine as the research background,the o-verall correlation between microseismicity and the mining process during the working face extraction,as well as the relationship between fault zones and mining speed,were studied through numerical statistics and theoretical analysis.The numerical fitting method was em-ployed to optimize the extraction speed and determine the extraction speed for different impact hazard zones on working face.The re-search results indicate that:①the correlation between the mining speed and microseismicity is high on the No.1012007 working face,and the mining speed is the main factor affecting rockburst during the mining period on working face;②as the mining speed on working face increases,the nonlinear trend of daily microseismic frequency and energy intensifies.When the mining speed is at 5.6 m/d,the risk of rockburst on working face is relatively low;③based on the clear understanding of the frequency of microseismic events and their energy variation with the mining speed,the mining speed of No.1012007 working face was optimized.It was determined that the maximum advan-cing speed in areas with high rockburst risk is 4.8 m/d,in areas with medium rockburst risk is 6.4 m/d,and in areas with low rockburst risk is 8.8 m/d.The research results can provide a certain reference for the design of similar mining face extraction speeds.