12.8呼图壁地震煤矿瓦斯浓度和涌水突变现象探析

Explore and Analysis of Mine Methane Concentration and Water Gushing Mutation in 12.8 Hutubi Earthquake

地震活动有关的地质流体脉动近年来为地震预报和煤矿井工生产安全所关注。在12.8呼图壁地震近震源区煤矿井下现场调查、瓦斯浓度和涌水量变化实时监测资料分析、地震与流体脉动相关关系研究等工作基础上,发现了主震前后10多个小时瓦斯浓度的毛刺状剧烈变化,以及井下涌水量先减少、后增加的地下水量突变的映震过程。此种瓦斯浓度和涌水突变异常现象的揭示和分析,说明地震发生会导致煤矿流体剧烈脉动。在地震前后井工正常生产前,必须注意加强瓦斯浓度和水量变化监测,加大抽气排水力度,更好地保障工人井下作业安全。

Geological pulsating flow associated with seismic activity has increasingly attracted the attention of earthquake prediction and coal mine safety production in recent years. On the basis of underground coal mine field investigation,gas concentration and water gushing changes real-time monitoring data analysis,and correlation research in the near-source region of 12. 8 Hutubi earthquake,it was found that an acute burr shape change in gas concentration before and after the earthquake within 10 hours and coal mine water gushing decreased first and then increased which related to the earthquake event. These disclose and analysis of methane concentration and water inflow mutation reveal that when the earthquake happened,the coal mine fluids will drastic change. Before the coal mine＇s safety production,it must take an active part in pumping and drainage to ensure workers＇ safety in underground mining.