近距离采空区下大断面切眼支护技术应用  

Application of Support Technology for Large-section Open-off Cut under Short-distance Goaf

作　　者：高建军 Gao Jianjun(Jinrui Coal Industry Co.,Ltd.,Huajin Coking Coal Co.,Ltd.,Lishi,Shanxi 033000)

机构地区：[1]山西焦煤华晋焦煤锦瑞煤业有限公司,山西离石033000

出　　处：《江西煤炭科技》2024年第1期42-44,共3页Jiangxi Coal Science & Technology

摘　　要：以9101采煤工作面为工程实例,该采面切眼跨度为8 m,且上覆为8^(#)煤层采空区及煤柱。切眼拟采用分次掘进方法施工,首先掘进巷道宽度4.5 m,后刷扩3.5 m;在掘进期间,通过探测切眼顶板与上覆8^(#)煤层采空区层间距,再设计切眼顶板支护方案;现场应用后,切眼顶底板、巷帮变形量分别为60 mm、73 mm,实现了近距离采空区下大断面切眼围岩变形有效控制。The author introduces the fractional tunneling method in constructing open-off cut at 9101 coal mining face with 8-meter-span open-off cut and overlying No.8 coal seam goaf and coal pillar,and proposes the roof support scheme for open-off cut through detecting the layers spacing between open-off cut roof and overlying No.8 coal seam goaf,whose field application shows that the surrounding rock deformation of large-section open-off cut can be effectively controlled under short-distance goaf with deformation amount of 60 mm and 73 mm in roof and floor and roadway's side respectively.

关 键 词：近距离煤层群 采空区 大断面切眼 分次掘进 围岩支护 

分 类 号：TD823.81[矿业工程—煤矿开采] TD353[矿业工程—矿山开采]