摘要
为有效防控近直立特厚煤层群水平分段开采中产生的冲击地压问题,以乌鲁木齐矿区乌东煤矿南采区为研究对象,分析87°近直立特厚煤层群冲击原因,探究这类煤层冲击地压防控的重难点,提出自保护卸压防控方法并分析该方法的卸压防冲效果。研究表明:近直立煤层群冲击地压主要发生在首采煤层中,主要原因为巷道位于支承压力与水平构造应力叠加产生的高应力区,冲击危险性高;对首采煤层采取自保护卸压措施,既可以改变煤岩体所处的应力环境,使支承压力与水平构造应力叠加产生的高应力区向深部煤岩体中转移,将采掘工作面巷道置于低应力区,还可以改变煤岩的性质,使其失去集聚大量弹性能的可能性,从而防止冲击地压发生。
In order to effectively prevent and control pressure bumping during mining of near-vertical extra-thick coal seam group,take south mining area of Wudong coal mine in Urumqi mining area as research object,impact reason of 87°near-vertical super thick coal seam group was analysed,key and difficult points of rock burst prevention and control of this kind of coal seam was explored,self-protection pressure relief prevention and control method were put forward,and pressure relief and impact prevention effect of this method was analysed.The research shows that rock burst of near-vertical coal seam group mainly occurs in the first coal seam.Main reason is that roadway is located in the high stress area caused by superposition of abutment pressure and horizontal tectonic stress,which enhanced rock burst risk.Taking self protective pressure relief measures for the first coal seam can not only change stress environment of coal and rock mass,transfer the high stress area generated by superposition of abutment pressure and horizontal tectonic stress to deep coal and rock mass,place roadway of mining face in the low stress area,but also change properties of coal and rock,and make it lose possibility of gathering a lot of elastic properties,so as to prevent occurrence of pressure bumping.
作者
欧阳振华
周鑫鑫
孙秉成
易海洋
刘旭东
周然然
OUYANG Zhenhua;ZHOU Xinxin;SUN Bingcheng;YI Haiyang;LIU Xudong;ZHOU Ranran(School of Safety Supervision,North China Institute of Science and Technology,Langfang Hebei 065201,China;Shenhua Xinjiang Energy Co.,Ltd.,Urumchi Xinjiang 830084,China)
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2021年第4期64-71,共8页
China Safety Science Journal
基金
国家自然科学基金面上项目资助(51974125)
河北省自然科学基金面上项目资助(E2020508002)
新疆维吾尔自治区天池百人计划资助项目(新人社函[2019]39号)
华北科技学院教育科学研究规划类项目(HKJYGH201803)。
关键词
近直立煤层
冲击地压
自保护卸压
首采煤层
防控
near-vertical coal seam
rock burst
self protection pressure relief
first mining coal seam
prevention and control
