赣南某矿微震监测系统优化改造

Optimized Reconstruction of Microseismic Monitoring System in a Mine in South Jiangxi

赣南某矿地质构造复杂,岩石节理裂隙发育,未处理的采空区体积大,随着开采逐步向边部和深部延伸,已有传感器无法实现矿区监测范围全覆盖,微震事件的定位精度与实际偏差较大,对现有微震地压监测监控系统进行优化改造,实现了全矿区的有效监测监控。从数值模拟测试上看,微震事件定位精度误差由原来10~15 m范围缩小至5~10 m范围,敏感度由原来里氏震级-2级提升至里氏震级-3级,能满足采空区稳定性变化的实时监测监控。

The geological structure of a mine in southern Jiangxi is complex, with complicated rock joints and bulky untreated goaf. As the mining gradually extends to the sides and depth, the existing sensors cannot achieve full coverage of the mining area, with large deviation between positioning accuracy and actuality of microseismic events.We optimized and reconstructed the existing microseismic ground pressure monitoring and control system to achieve effective monitoring of the entire mining area. The results show that positioning accuracy error of the microseismic event is reduced from the original range of 10 to 15 m to the range of 5 to 10 m, and the sensitivity is improved from the original Richter scale of-2 to the Richter scale of-3. It can meet the real-time monitoring and control of the stability of the goaf.