矿山深部开采岩体稳定性监测技术研究

针对矿山深部开采过程中易发生地压动力灾害的问题，基于微震监测技术，结合矿山实际特点建立岩体稳定性监测系统。优化台网设计，通过定点爆破的方法进行波速校正，最终建立了定位误差在10m,灵敏度在-2.2的监测台网。对监测数据进行波形拾取，分析微震事件时空演化特征，圈定潜在危险区域，并对潜在危险区域围岩变形损伤进行分析。最终总结出微震事件大幅度上升且处于较高水平、空间分布高度集聚、能量指数突然下降而累计视体积迅速上升的动力灾害预警前兆。研究结果可为深部开采岩体稳定性监测提供参考。

Investigation on monitoring technology of rock mass stability in deep mining

The monitoring system of rock mass stability was established based on the microseismic monitoring technology in view of the problem that the dynamic disaster of ground pressure was easy to occur in the process of deep mining. The design of the monitoring network was optimized, and the wave velocity was corrected by the method of fixed-point blasting, a monitoring network with a positioning error of 10 m and a sensitivity of - 2.2 was established finally. The waveform of the monitoring data was picked up and the temporal-spatial evolution characteristics of microseismic events were analyzed, the potential dangerous areas were delineated, and the deformation and damage of the surrounding rock in the potential dangerous areas were analyzed. Finally, the early warning precursor of dynamic disaster was summarized, which is that the microseismic events increased greatly and in a high level, the spatial distribution was concentrated highly, the energy index suddenly dropped and the cumulative apparent volume increased rapidly. The research results can provide a reference for the stability study of deep mining rock mass.