综放工作面过断层期间微震规律分析

为有效预防深部矿井综放工作面过断层期间冲击矿压事故的发生，采用SOS微震监测系统对断层区域煤岩体内微震活动进行全时连续监测，并分析统计在过断层期间微震活动发生的次数和能量释放的变化规律。结合数值模拟的手段，对综放工作面过断层期间微震活动规律在机理上进行理论分析。研究表明：断层等弱面地质构造具有较高的不稳定性，随着回采工作面的逐渐临近，区域内每日震动释放总能量值和震动次数的起伏波动逐渐增大；强烈微震活动发生前有一段弱震活动时期，为强震的发生积蓄了更多的能量。

Analysis on microseismic law when fully-mechanized coalface passed through fault

In order to effectively prevent the pressure bumping accidence occurred when fully mechanized coalface passed through fault，the SOS microseism monitoring and measuring system was applied to the full time monitoring and measuring on the microseismic activities in the coal and rock mass of the fault area.Based on the variation features of the energy releasing and vibration frequency in the microseismic activities，analyzed active accumulated energy of the fault block affected to the pressure bumping occurred and analyzed the variation law of the microseismic activity influenced by the human mining and excavation in the fault area.The results show that the microseismic activity in the fault tectonic area has a high instability.With the fully mechanized coalface pass through the fault，the daily seismic release total energy value in the fault area will be steadily increase.The max energy peak will be a tendency to be rapidly increased.Before the strong microseismic activity occurre，there will be a weak seismic activity period and the weak seismic activity will play an energy accumulation role to have a strong seismic to be occurred.