综采放顶煤工作面冲击地压微震事件分布规律研究

Study on distribution law of rock burst microseismic events in fully-mechanized top coal caving face

对耿村煤矿13230综放工作面冲击地压微震事件分布位置进行研究,结合该工作面地质构造、地表沉陷和侧向支承压力,对比分析该工作面10个月微震数据,得出以下规律:回风巷发生小能量事件总频次要大于运输巷,且小能量事件主要发生在回风巷以下15~70m、直接底和煤层底部;大能量事件两巷均等分布,且大能量事件层位较高。总结了缓倾斜厚煤层综放开采微震事件发生位置,回采工作面运输巷是防冲的重点关注区域。研究为工作面安全回采提供了宝贵的经验。

Distribution of microseismic events of rock burst in 13230 fully-mechanized caving face of Gengcun Coal Mine was studied.Combining with the geological structure,surface subsidence and lateral abutment pressure of the working face,10 months microseismic data of the working face were compared and analyzed,and the following rules were obtained:the total frequency of small energy events in return air roadway was larger than that in transport roadway,and the small energy events occur in return air roadway.The main occurrences were 15~70 m below the return air roadway,the direct bottom and the bottom of the coal seam.The high energy events were evenly distributed in the two roadways,and the high energy event horizons.The occurrence location of microseismic events in fully-mechanized caving mining in gently inclined thick seam was summarized.The transportation roadway of mining face was the key area of scour prevention.The research provided valuable experience for safe mining in working face.