微震技术在深部矿山地压监测中的应用

Application of Microseismic Technique in Monitoring Ground Pressure in Deep Mines

针对红透山铜矿深部地压活动频繁现状,在红透山铜矿建立矿山微震监测系统,对深部地压活动规律进行连续实时监测。介绍了监测区域的选择及传感器的优化过程,并对微震信号的识别进行了系统分析。通过对监测数据分析发现:根据能量大小及波形差异可以很好地对微震事件和爆破事件进行区分;微震事件的定位结果能直观反映岩体内部裂隙的变化情况;微震事件频次呈上升趋势,显示地压活动逐渐增强。监测系统能够及时捕捉由地压活动引起的微震活动信息,并实现微震源定位,这对于开展矿山动力灾害的预测研究具有重要的现实意义。

In view of the present frequent deep ground pressure activities in Hongtoushan Copper Mine,mine microseismic monitoring system was established in the mine for continuous real-time monitoring of deep ground pressure activity.The paper describes the selection of the monitoring area and the optimization of sensor layout.The systematic analysis was made of the identification of microseismic signal and it is found thorough the analysis of the monitoring data that microseismic events and blasting events can be well differentiated in accordance with the energy magnitude and wave form;the location results of microseismic events can directly reflect the change of the fissures in rockmass;the rising tendency of microseismic event frequency indicates gradually enhanced ground pressure activity.The monitoring system can timely capture the information of microseismic activity caused by ground pressure and realize the location of microseismic source,which is of great practical significance to the research on the prediction of mine dynamic disasters.