向斜轴部附近微震活动规律及对冲击矿压的影响

根据波兰SOS微震监测系统所得到的微震数据，结合砚北煤矿250204工作面的实际情况，具体分析了向斜轴部附近的震源演化规律，得出结论：工作面回采期间，当工作面处于向斜轴部时，震源主要分布在煤层上侧，即微震事件主要发生在顶板附近；当回采工作面逐渐远离向斜轴部时，震源分布有向煤体下侧转移的趋势，即微震事件主要发生在底板附近。当向斜轴部和工作面见方2因素相叠加时，发生冲击的可能性明显增大。同时总结了向斜构造发生冲击矿压的能量频次规律，对生产实践起到重要作用。

Micro-seismic Activity Law Near the Synclinal Axis and its Impact

According to the data of Poland SOS microseismic monitoring system，the seismic source evolution law near the synclinal axis is analyzed combining with the actual conditions of 250204 working face in Yanbei. The conclusions are as follows: during the period of mining，and when the working face is in the synclinal axis，the seismic source are mainly distributed above the coal seam，that is，the microseismic activity mainly occurs near the roof. When the working face is moving away from the synclinal axis gradually，seismic source distributions have a tendency to the lower side of coal seam，which means that the micro-seismic activity occurs mainly near the floor. When the two factors of syncline axis and the working face square overlay，rock burst tendency increases significantly. At last，the energy-frequency law of rock burst for synclinal axis tectonic is summarized which plays an important role in the production practice.