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三道庄露天矿地下采空区密集且相互重叠,属于高危采空区,其治理和开采难度很大。因此,有必要对其进行全方位的监测,以保证生产的安全。为此,建立了一套48通道全数字型微震监测系统。利用大量的现场微震岩体破裂定位事件和非定位事件监测数据,从随时间序列变化、能量、地震矩和视应力详细量化分析了岩体破裂定位事件监测结果,同时,从日累计触发事件和单通道触发事件两方面对岩体破裂非定位事件进行了分析。大量的监测数据量化分析结果表明,目前D采区岩体整体上处于相对稳定状态,发生大规模地压活动的可能性较低,井下局部可能出现小范围的岩体失稳现象。
Sandouzhuang surface mine underground gobs intensive and overlapping, belonging to high-risk goaf, its governance and mining is very difficult. Therefore, it is necessary to conduct a full range of monitoring to ensure the safety of production. To this end, the establishment of a 48-channel all-digital microseismic monitoring system. Based on a large number of monitoring data of ruptured and unlocated events in onsite microseismic rock mass, the monitoring results of rock mass rupture location events are quantified and analyzed in detail with time series changes, energy, seismic moment and apparent stress. At the same time, The single-channel triggering event analyzed the failure of the rock mass in two aspects. Quantitative analysis results of a large number of monitoring data show that the rock mass in the mining area D is relatively stable as a whole at present, and the probability of large-scale underground pressure activities is low, and the rock mass instability may occur in a small area locally.