不规则煤柱区采动诱发矿震规律研究

Study on the Law of Mining-induced Microseism in Irregular Coal Pillar Area

为探究不规则煤柱区采动诱发的矿震规律,以鹤岗某矿实际工程地质特征为研究背景,采用微震监测技术手段,从矿震的能量、频次与时间的关系和矿震的时空演化两方面分析了采动诱发的矿震规律。结果表明:当工作面推进至区段煤柱宽度变化区、上覆遗留煤柱区以及多巷道交叉区域时,震动信号活跃性明显增加,冲击危险性急剧增加。

In order to explore the law of mining-induced microseism(MS)in irregular coal pillar area,taking the actual engineering geology of a mine in Hegang as the research background and using MS monitoring technology as the research means,this paper analysed the law of mining-induced MS from the relationship between energy,frequency,and time and evolution of MS sources.The results show that when the working face advances to the changing area of coal pillar width,overlying residual pillars and multi-roadway intersection area,the activity of MS increases obviously,and the rockburst risk increases sharply.