特厚冲击煤层回采速度与微震活动规律研究

Mining Speed of Extra Thick Impact Coal Seam and Micro-seismic Movement Law

为了确定合理的工作面回采速度,降低冲击地压的发生概率,针对崔木矿22302工作面回采过程的强动力显现,对工作面在不同推进阶段的微震事件与回采速度的影响关系进行了分析。研究结果表明,回采速度对微震事件的频次影响较为直接,但回采速度的变化对微震能量的释放影响最为明显,尤其是大能量微震事件的发生均集中在回采速度的剧烈变化期间,存在发生冲击地压的可能。

In order to determine rational mining speed of working face and decrease rock burst occurrence probability, to the strongdynamic pressure appeared during mining process of 22302 working face in Cuimu coal mine, then the relation between micro-seismicincident in different advanced step of working face and mining speed was analyzed. The results showed that micro-seismic incidents frequencywas influenced by mining speed immediately, mining speed variation was an obviously factor to micro-seismic energy relaxed,and some large energy micro-seismic incidents almost appeared the period of mining speed variation violently, the rock burst possibilitywould be improved.