中文摘要：

断层是能够诱发冲击地压的一种重要地质构造,为研究断层活动对冲击地压发生的作用机制,以大同忻州窑煤矿8935回采工作面为例,通过对4个月内连续发生的十余次冲击地压案例的分析,得到正断层影响下的冲击地压的发生特征,冲击地压发生前后电磁辐射、微震等的信号特征和前兆信息。研究结果表明:冲击地压发生频度和强度受断层影响明显,断层对冲击地压的影响体现在两方面:一方面是改变了煤岩体的物理力学性质,另一方面是使构造应力场变得复杂;微震事件集中在断层前方230~360 m,冲击位置在工作面前方0~60 m;电磁辐射能量和脉冲数曲线呈现马鞍形的形态时预示着冲击危险来临,随后发生冲击地压的概率极高;微震监测显示冲击地压发生能量为105~106 J量级,持续出现能级大于105 J的微震事件,且能量起伏变化大,则存在冲击危险。

英文摘要：

The fault is an important geological structure that can induce coal bumps. A field investigation was taken in the 8935 working face in Xinzhouyao coal mine for the mechanism of coal bumps induced by fault activation. There was a series of serious coal bumps in the past 4 months. The features of coal bumps influenced by normal fault were studied through the analysis of these cases obtaining characteristics of electromagnetic radiation and microseismic before and after the coal bump. The fault has obvious influence on frequency and intensity of coal bump,which is reflected in two aspects:it has changed the physico-mechanical properties of coal and rock,and made the tectonic stress field become complicated. Seismic often occurred in the range of 230-360 m in front of the fault and the impact location is 0-60 m ahead of mining face. The impact danger is approaching when the curve of electromagnetic radiation energy and the number of pulses present the saddle form,and then the probability of coal bump is very high. Microseismic monitoring shows that the occurred energy of coal bump is between 105-106 J magnitude. There are impact dangers when microseismic with more than 105 J of the energy continues to occur and its energy has great fluctuation.