微震监测技术在煤矿顶底板裂隙发育探测规律的研究与应用

Research and application of microseismic monitoring technology in detecting the development of cracks in the roof and floor of coal mines

为消除矿井回采工作面底板灰岩突水威胁,利用二1-15010工作面已有巷道建立微震水害监测系统,通过对微震信号的采集、分析,精确地计算出微裂隙的破坏位置、能量以及可能影响的区域,实时监测采动过程中工作面底板含水层破裂引起的微震信号,分析微震事件的空间展布,全面有效的监测工作面回采期间底板采动破坏带对灰岩含水层的影响,实现水害实时监测预警,为指导工作面底板灰岩水害防治工作提供依据,确保采面能够安全回采。

In order to eliminate the threat of water inrush from limestone on the floor of the mining face,a micro-seismic water hazard monitoring system was established by using the existing roadway of theⅡ1-15010 working face.Through the collection and analysis of micro-seismic signals,the damage location,energy and possible affected area of micro-cracks were accurately calculated,and the micro-seismic signals caused by the fracture of the aquifer on the floor of the working face during mining were monitored in real-time,and the spatial distribution of micro-seismic events was analyzed,the impact of the floor mining damage zone on the limestone aquifer during the mining of the working face was fully and effectively monitored,realizing real-time monitoring and early warning of water hazards,providing a basis for guiding the prevention and control of water hazards in the floor limestone of the working face,and ensuring the safe mining of the working face.