关键词: 厚煤层, 冲击地压, 微震监测, 预警参数

Abstract: Abstract: The Cuimu Coal Mine has deep mining, thick coal seams and bottom coal. During the excavation, the power of the roadway has appeared many times. In this paper, the excavation of 21306 working face in Cuimu Coal Mine is taken as an engineering example. The microseismic monitoring system is used to analyze the energy distribution characteristics and anomaly coefficients of microseismic events during excavation, and further determine the correlation between rock burst hazard and microseismic early warning parameters. The results show that the microseismic energy and frequency manifestations of different excavation stages are different, but have certain regularity. Intensive large energy events occur when the microseismic energy continues to rise and the frequency gradually decreases, or when the tunneling speed suddenly increases. Statistics show that after the microseismic activity anomaly coefficient is greater than 1.5, a large energy event will occur.