水力压裂技术在防冲矿井中的应用与研究

Application and Research of Hydraulic Fracturing Technology in Anti-burst Mines

红阳三矿1208工作面进入上部7号煤层遗留煤柱时,受煤柱造成的集中应力及高埋深自重应力"双重"应力叠加作用影响,矿压显现剧烈,容易引起冲击地压的发生,对1208工作面安全回采造成威胁。在此情况下,利用水力压裂技术处理巷道煤柱侧顶板,有利于工作面上方顶板随回采及时垮落,降低巷道围岩的集中应力,增大能量传输过程中的衰减系数,最终减小乃至消除坚硬难垮顶板对工作面回采的危害。

When 1208 working face of Hongyang No.3 Coal Mine enters the coal pillars left by the upper No.7 coal seam,it is affected by the"dual"stress superimposition of the concentrated stress caused by the coal pillars and the high buried depth selfweight stress,and the rock pressure appears violently,which is easy to cause the occurrence of rock burst,posing a threat to the safe mining of 1208 working face.In this case,using hydraulic fracturing technology to treat the roof of the coal pillar side of the roadway will help the roof above the working face to collapse in time with the mining,reduce the concentrated stress of the surrounding rock of the roadway,increase the attenuation coefficient in the energy transmission process,and finally reduce and even eliminate the harm of the hard roof difficult to collapse to the working face.