玲南金矿微震监测系统的建立及应用研究

针对玲南金矿深部开采过程中岩爆等地压灾害频发的现状,建立了深部微震监测系统以实现对岩体的连续监测和岩爆的实时预报。结合传感器布置原则和矿山工程条件,对微震监测系统进行台阵分析,计算微震事件的定位精度和系统的灵敏度,得到最优的传感器布置方案。采用定点爆破进行波速校正。定位结果表明,微震监测系统的平均定位误差为5.7 m,能够满足矿山微震监测的需要。基于玲南金矿的微震监测数据,对微震活动的时空演化规律及民采定位进行研究,取得了初步成果。

Research on Establishment and Application of MicroseismicMonitoring System in Lingnan Gold Mine

In allusion to the current situation of ground pressure disaster (rock burst, etc) appeared frequently during the process of deep mining in Lingnan gold mine, we established a microseismic monitoring system to realize the continuous monitoring for rock mass and the real-time prediction for rock burst. Based on the sensor layout principles and the conditions of mine, we made the array analysis of microseismic monitoring system, calculated the location accuracy of seismic event and the sensitivity of system, and got the optimal sensor placement plan. The fixed-point blasts were used for wave velocity correction. The location results show that the average positioning error of microseismic monitoring system is 5.7 m, which can meet the needs of the mine. Based on the monitoring data recorded in Lingnan gold mine microseismic monitoring system, we research the space-time evolution rule of the microseismic activity and location of private mining, and achieve the preliminary results.