Stress evolution law and microseismic analysis during mining of roadway cutting coal pillar working face
Coal pillars are the places where stress concentration occurs,making them the most susceptible to rock burst and posing a se-rious threat to coal mine safety production.There are various types of coal pillars in the No.4310 working face of Pengzhuang Coal Mine.In order to ensure safety production,numerical simulation was conducted on the stress distribution during the mining process of the No.4310 working face,and the stress distribution characteristics during the mining process of the working face were analyzed.The frequency and energy of microseismic events during the initial mining and excavation period of the monitoring working face are signifi-cantly higher than those in other periods,which is consistent with the numerical simulation results.Based on stress analysis and micro-seismic monitoring results,corresponding prevention and control plans were formulated to provide a basis for the safety demonstration of rock burst in the working face.
multiple types of coal pillarsimpact ground pressurestress evolutionnumerical simulation
万方数据
维普
