兖州矿区多尺度矿震规律监测研究

Research on multi-scale mine earthquake monitoring in Yanzhoumining area

为监测不同尺度矿震,兖州矿区分别在井田尺度和矿井尺度建立了矿震监测台网和微震监测台网。基于井田尺度监测结果,分析了兖州矿区矿震活动规律,按矿震强度及分布范围确定了危险区域,得出矿震与构造区应力场的分布具有较强的相关性;研究了强矿震的前兆规律,得出强矿震发生前其频次和能量等级会显著提高。利用微震监测台网监测结果分析了东滩矿工作面开采过程中矿震在时间及空间上的活动规律,发现了工作面附近震源的分布规律,得出了矿震与开采活动的关系密切,同时确定了各监测点合理的波速值。该研究对兖州矿区冲击矿压的监测预警和防治具有重要意义。

In order to monitor mine shock in different scales, it has set up mine seismic monitoring network and microseismic monitoring network at mine field scale and mine scale respectively in Yanzhou mining area. Based on the mine field monitoring results, the regularity of mine activity in Yanzhou mining area was analyzed. According to the intensity and distribution range of mine shocks, the dangerous area was determined. It was found that the mine shock and the distribution of stress field in tectonic area was strongly correlated. The precursor regular shows that the frequency and energy level will increase significantly before strong coal shock appeared. Using the monitoring results of microseismic monitoring network, the temporal and spatial regularity of mine shock during the mining process of Dongtan coal face was analyzed. The distribution of the source near the working face was studied, discovered the relationship between mine shock and mining activity was closely related. Finally, the reasonable wave speed value of each monitoring point is determined. This study is of great significance to monitoring, early warning and prevention of rock burst in Yanzhoumining area.