阿舍勒铜矿微震监测系统建设与应用研究

为了应对阿舍勒铜矿二期深部开采工程中面临的地压灾害问题,结合深部地压活动性现状与采掘布局,合理选择了地压监测设备, 设计了32通道微震监测系统台网布设方案, 进行了现场安装调试以及定位精度反演与校准试验。在已建立系统的监测数据基础上, 通过波形识别区分了微震信号与其他信号, 建立了二期深部工程有效微震事件库, 统计与分析了大尺度矿井范围内时间、空间以及定量地震学参数的趋势特征, 结合现场地压灾害实例实现了监测预测, 结果表明: 时间序列上的活跃期、空间上的低震中集中度指标、定量地震学参数上的低b值和CUFIT值急剧积累至高值区后下降, 是地压灾害发生的预警前兆。

Construction and Application of Microseismic Monitoring System in Ashele Copper Mine

In order to deal with the ground pressure disaster problems encountered in the second-phase deep mining project of Ashele Copper Mine, the appropriate ground pressure monitoring equipment was selected based on the current status of active ground pressure in deep mining area and the mining arrangement. A network layout program with a 32-channel microseismic monitoring system was designed, installed and debugged on site. Tests on positioning accuracy inversion and calibration were performed. Based on the monitoring data of the established system, the effective microseismic event database for the second-phase deep mining project were established after distinguishing microseismic signals from other signals by waveform identification. The statistics and analysis of trend characteristics of time, space, and quantitative seismological parameters in the larger mining shaft, based on the practical ground pressure disaster, can realize the monitoring and forecasting of disasters. It is found that the active period of time in series, the low epicenter concentration index in space, the low b-value and CUFIT value in quantitative seismological parameters, as the early warning signs for the occurrence of ground pressure disaster, will accumulate sharply to increase to a high value area and then decline.