深井煤层大巷矿震发生机理及防治研究

Study on Mechanism and Prevention of Mine Earthquakes in Deep Shaft Main Roadways

以山东赵楼煤矿二集下山3条煤层大巷频繁发生矿震为工程背景,通过理论分析和微震监测手段,研究了二集下山大巷频繁发生矿震的主要原因。研究结果表明:5301采空区侧向支承压力和F15断层构造应力叠加形成的高应力是诱发二集下山大巷频繁发生矿震的主要原因。根据理论计算结果分别对二集下山3条煤层大巷的冲击危险性进行了评价。巷道围岩的高应力状态并非发生冲击地压的充分条件,冲击地压的发生还受巷道围岩稳定性的影响,通过将赵楼煤矿二集大巷布置层位由煤层优化到岩层中,有效防治了大巷矿震和冲击地压灾害。

Based on the engineering background of frequent mine earthquake in three coal seam main roadways in Zhaolou coal mine, Shandong province,the main causes of frequent mine earthquake in main roadway are studied through theoretical analysis and microseismic monitoring. The results show that the high stress caused by the superposition of the lateral abutment pressure of 5301 goaf and the structural stress of F15 fault is the main cause of frequent mine earthquake in main roadway. According to the theoretical calculation results, the impact risk of the three coal seam main roadways was evaluated. The high stress state of roadway surrounding rock is not the sufficient condition for the occurrence of rock burst,the occurrence of rock burst is also affected by the stability of roadway surrounding rock. By changing the layout of the main roadway in Zhaolou coal mine from coal seam to rock seam,the main roadway mine earthquake and rock burst disasters are effectively prevented and controlled.