为有效监测和防治综采工作面冲击地压事故,以耿村煤矿巨厚砾岩层下综放工作面为工程背景,采用综合指数法评价综放工作面冲击地压危险性,利用微震监测结果研究综放工作面回采期间矿震特征。结果表明:(1)13230综放工作面冲击危险性指数为0.65,属于中等冲击地压类型;(2)综放工作面回采期间矿震主要发生在工作面前方顶底板煤岩体中,工作面处于“见方区”时发生矿震的频次、最大能量和总能量均明显高于“非见方区”的,“见方区”矿震的震源主要位于工作面前方中部顶底板煤岩体和运输平巷上帮顶板煤岩体中;(3)综放工作面顶板周期来压期间通常伴随大能量的矿震事件。研究结果可为耿村煤矿综放开采冲击地压监测和防治提供参考。

In order to effectively monitor and prevent coal bump accidents,taking the coal face 13230 under hugely-thick conglomerate stratum in Gengcun coal mine,Yima mining area,China,as an engineering back‐ground,the coal bump risk of the coal face was evaluated by using the comprehensive index method.At the same time,the characteristics of underground mine earthquakes were studied in line with the microseismic event monitoring results during the coal face mining.The results showed that:(1)Coal bump risk index of the coal face 13230 was 0.65,therefore,coal bump type belonged to medium burst grade.(2)During coal face mining period,mine earthquakes mainly occured in the coal/rock mass in front of the coal face.When the coal face was in the square-areas,the frequency,maximum energy,and total energy of mine earthquakeswere significantly higher than those in the non-square-areas.The seismic sources of the mine earthquakes in the square-areas were mainly located in coal seam and its roof and floor strata in the middle of the coal face front,and located in coal seam and its roof strata in the upper side of the headgate.(3)Large energy mine earthquake events usually occured in roof periodic weighting periods in the coal face.The research con‐clusions provide reference for monitoring and prevention of coal bumps in fully mechanized caving mining in Gengcun Coal Mine.