基于微震监测的地压灾害预警参数分析研究

利用麒麟厂在1 751～1 031 m水平已建成的微震监测系统,通过数据采集及筛选处理,构建了有效微震事件库,并结合现场地压活动状况,从微震时间序列、空间分布与演化、定量地震学参数等方面对微震事件展开了分析研究,以确定多参量预警阀值,实现地压灾害监测预警。结果表明,麒麟厂微震监测系统的预警阀值为: 时序集中度Q_时>1,震中集中程度Q_空≤100,地震学参数b≤0.20、β_n≥1.5和η≥1.1。

Analysis of Early Warning Parameters for Ground Pressure Disaster Based on Microseismic Monitoring

By using the microseismic monitoring system established at sea levels between 1 751 m and 1 031 m in Qilinchang Mine, a database of effective microseismic event was constructed by screening the collected data. Then, those microseismic events were analyzed in terms of time series, spatial distribution and evolution, quantitative seismological parameters, in combination of the ground pressure situation. As a result, the threshold of early warning parameters for the mine were determined as follows: Q-time, reflecting the concentration of time series, is more than 1; Q-space, reflecting the concentration of epicenter, is equal to or less than 100; seismological parameter b≤0.20,β_n≥1.5, and η≥1.1. Consequently, the monitoring and early warning of ground pressure disaster in Qilinchang Mine can be actualized.