薛湖煤矿穿层水力冲孔周围煤体变形规律研究  

Study on Coal Deformation Law of Hydraulic Flushing Passing Through Layer in Xuehu Coal Mine

作　　者：宝坤 张明杰[1,2] 魏国营 BAO Kun1, ZHANG Mingjie1,2, WEI Guoying1,2(1.School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454003,China;2.State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Jiaozuo 454003, Chin)

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003 [2]河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地,河南焦作454003

出　　处：《煤矿安全》2018年第3期17-20,共4页Safety in Coal Mines

摘　　要：为研究穿层水力冲孔后孔洞周围煤体变形规律,指导薛湖煤矿防治瓦斯突出,利用FLAC^(3D)软件及相关理论,对冲孔周围煤体的应力场、位移场分布规律进行数值模拟研究,分析了冲煤量对周围煤体应力和位移变化的影响,并现场试验。结果表明:薛湖煤矿穿层水力冲出煤量达1.54 t/m时,使孔洞周围煤体卸压,降低范围为2.26~3 m;孔洞上方顶板出现拉张应力,孔洞周围煤体产生指向孔洞的径向位移,位移大小与冲煤量正相关,位移范围为2.3~3.18 m,冲孔中部位移量大于底部。结合瓦斯抽采效果,综合分析比较,确定薛湖煤矿合理冲煤量为1.15 t/m左右。In order to study coal deformation law of hydraulic flushing passing through layer to guide Xuehu Coal Mine to control gas outburst, based on the field test, we use FLAC^（3D） software and related theories to study numerical simulation of stress field distribution and displacement field distribution of coal around punching hole, and analyze the influence of the amount of coal on the stress and displacement of the surrounding coal and conduct the field test. We get a series of results, for example, when the amount of coal is up to 1.54 t/m, hydraulic punching makes coal pressure relief around the hole, and the range of the reduction of maximum principal is 2.26 m to 3 m. The tensile stress occurs on the top plate of the hole, coal around the hole forms radial displacement which is point to hole, the range of coal displacement is positively related with the amount of coal, and the range of which is 2.3 m to 3.18 m, and the displacement of the central part of the hydraulic punching is bigger than the bottom. Combined with gas extraction effect, we make comprehensive analysis and comparison to determine that the coal amount of about 1.15 t/m is the reasonable amount of coal in Xuehu Coal Mine.

关 键 词：穿层水力冲孔 煤体变形 数值模拟 位移量 卸压 

分 类 号：TD713[矿业工程—矿井通风与安全]