水力压裂技术在二次动压巷道卸压中的应用  

Application of hydraulic fracturing technology in secondary dynamic pressure roadway pressure relief

作　　者：翁海龙 WENG Hailong(Baode Coal Mine,Shendong Coal Group Co.,Ltd.,Xinzhou 036600,China)

机构地区：[1]神东煤炭集团保德煤矿,山西忻州036600

出　　处：《陕西煤炭》2021年第2期137-140,共4页Shaanxi Coal

摘　　要：保德煤矿8号煤层三(上)盘区位于井田南侧,该盘区靠井田南侧边界段受古河流冲刷影响,老顶为较厚的含砾粗砂岩,该区域回采期间工作面矿压显现明显,回采后会导致相邻工作面二次采动巷道变形严重。为减小相邻工作面巷道变形,采取了水力压裂技术,通过“切断”传递力的关键层,降低二次动压巷道变形。实践证明,81307胶带顺槽(对应81308一号回风顺槽13~14联巷段)水力压裂预卸压技术有效解决了81308一号回风顺槽二次动压巷道在相邻81307工作面采动后的留巷难题,同时节约了巷道维护工程量。The third(upper)panel of No.8 coal seam in Baode coal mine is located in the south of the minefield.The southern part of the panel near the boundary of minefield is affected by the ancient river erosion,and the main roof of the coal seam is thick gravel bearing coarse sandstone.The mine pressure behavior of working face is obvious during mining in the area affected by scouring,which will lead to serious deformation of roadway in adjacent working face due to secondary mining.In order to reduce the deformation of adjacent working face roadway,hydraulic fracturing technology is adopted to reduce the deformation of secondary dynamic pressure roadway by“cutting off”the key layer of transmitting force.The practice shows that the hydraulic fracturing pressure relief technology can effectively solve the problem of retaining the secondary dynamic pressure roadway of 81308 return roadway after mining of the adjacent 81307 working face,and save the amount of roadway maintenance work.

关 键 词：水力压裂 二次动压 巷道围岩 顺槽卸压 保德煤矿 

分 类 号：TD322[矿业工程—矿井建设]