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柿竹园多金属矿采用中深孔大规模崩落工艺回采矿柱,特大爆破回采过程中,对岩石微震事件进行了监测,介绍了微震监测系统。通过微震监测,了解到群矿柱与垂悬顶板余震的时空变化特点,对群矿柱中的应力集中区域进行了较好的定位,进而对群矿柱与垂悬顶板进行了基于微震监测结果的稳定性评价,为井下安全生产和下一步回采矿柱的顺序提供了依据。
In Shizhuyuan polymetallic mine, large-scale caving mining with middle-deep-hole caving method was used to mine pillars. In the process of extra-large blasting, the microseismic events of rock were monitored, and the microseismic monitoring system was introduced. Through the microseismic monitoring, the spatial and temporal variations of the aftershocks in the group of pillar and the hanging roof are known, and the stress concentration area in the group of pillar is well located. Then, the group pillar and the hanging roof are monitored based on microseismic monitoring The stability evaluation provides the basis for the safe production and the order of mining pillar in the next step.