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为提高采空区突水监测及控制效果,理论分析了采空区突水的微震现象,提出了微震能量释放率、能量密度的概念和计算方法,对微震活动性进行了时间、空间上的参数表达;提出了采空区突水分区分时微震监测法,指出对不同时期、不同危险区域采取针对性监测分析方法和危险控制手段以避免采空区突水事故的发生.采空区突水微震监测案例分析表明:采空区突水灾害有微震活动前兆信息,微震活动性与突水危险存在内在联系;突水发生前微震能量、频次、能量释放率均有增强的趋势,采用能量释放率可实时分析判定突水危险区微震活动强度的发展变化,采用能量密度可对突水危险区各区域微震活动强弱进行量化分析比较.
In order to improve the monitoring and control effect of gully water inrush, the microseismic phenomenon of gushing water inrush was theoretically analyzed, and the concept and calculation method of microseismic energy release rate and energy density were put forward. The microseismic activity was studied in time and space The authors put forward the method of time-division microseismic monitoring of gob-submerged sub-zone and pointed out that the monitoring and analysis methods and risk control measures are adopted to avoid the occurrence of water inrush accident in different periods and different dangerous areas. The case study of microseismic monitoring shows that there are interrelations between the microseismic activity and the risk of water inrush caused by water inrush from the gob of the mined-out area. Before the water inrush, the energy, frequency and energy release rate of microseismic are all increased. The real-time analysis can be used to determine the development of microseismic activity in the water inrush danger zone. Quantitative analysis and comparison of the microseismic activity in each region of the water inrush danger zone can be carried out by using the energy density.