厚硬顶板地面水力压裂冲击地压防治技术研究  

Rock burst control technology with ground drilling hydraulic fracturing forthe thick and hard roof of Mengcun Mine

作　　者：姜国成[1] JIANG Guocheng(Xi’an Branch of CCTEG Beijing Huayu Engineering Co.,Ltd.,Xi’an 710075,China)

机构地区：[1]中煤科工集团北京华宇工程有限公司西安分公司,陕西西安710075

出　　处：《煤炭工程》2024年第10期216-223,共8页Coal Engineering

摘　　要：为了解决孟村煤矿冲击地压难治理的问题,开展孟村煤矿401盘区地面水平井分段水力压裂防冲实践,并基于“动静载荷叠加诱发机理”分析了401102工作面冲击地压发生机理,综合考虑关键层判别、覆岩结构、关键层物理力学性质、赋存特点及能量释放规律等因素,确定401102工作面厚硬顶板地面压裂的目标层位,确定了2口水平井的布置位置,并对水平井井身结构参数、压裂方案、压裂参数设计等技术参数进行研究,通过对比421102工作面在压裂区域及非压裂区域的支架监测数据对地面压裂技术的防冲卸压效果进行检验,结果表明:工作面进入地面压裂区域支架压力低、来压规律不明显,支架工作阻力平稳,顶板未产生强烈动载,说明地面压裂对目标岩层起到了较好的卸压效果,保障了421102工作面的安全高效回采。Aiming at the difficulties in rock burst control of Mengcun Coal Mine,a segmented hydraulic fracturing was implemented through constructing ground horizontal well in the 401 panel of Mengcun Coal Mine.Based on the induction mechanism of dynamic and static load superposition,the rockburst mechanism in the 401102 working face was analyzed.Taking into account the analysis results of key layer discrimination,overburden structure,physical and mechanical properties of key layers,occurrence characteristics,and energy release laws,the target layer for ground fracturing of the thick and hard roof of the 401102 working face was determined.The layout positions of two horizontal wells(MC-01L,MC-02L)were determined,and technical parameters such as the wellbore structure parameters,fracturing scheme,and fracturing parameter design of the horizontal wells were studied.By analyzing the monitoring data of the support in the fracturing and non-fracturing areas of the 421102 working face,the rockburst control and pressure relief effects of the fracturing technology were analyzed.The results showed that,when entering the ground fracturing area pressure on the support was low,the weighting had no obvious regularity,working resistance of the support was stable,and the roof did not produce strong dynamic loads,indicating the ground fracturing achieved favorable pressure relief effect on the target rock layer,which ensured the safe and efficient recovery of the 421102 working face.

关 键 词：冲击地压 地面水平井 支架工作阻力 动静载叠加 灾害防治 

分 类 号：TD324[矿业工程—矿井建设]