深埋藏厚煤层切顶卸压沿空留巷技术研究及应用  

Research and application of roof cutting and pressure relief along the goaf in deep buried thick coal seams

作　　者：杨冬冬 YANG Dongdong(Shanxi Huobaoganhe Coal Mine Co.,Ltd.,,Linfen 041600,China)

机构地区：[1]山西霍宝干河煤矿有限公司,山西临汾041600

出　　处：《煤矿现代化》2024年第5期104-109,114,共7页Coal Mine Modernization

摘　　要：针对矿井深埋藏且资源枯竭衔接紧张的现状,以干河煤矿2-300工作面沿空留巷无煤柱开采技术应用为研究对象,通过恒阻锚索加强支护技术、顶板深孔定向聚能预裂切顶技术、门式支架临时支护技术、碎石帮挡矸防漏风技术应用,制定了沿空留巷实施方案,并进行井下现场试验与矿压监测,监测结果表明:工作面顶板碎胀系数取1.31,切顶眼深度取13 m,恒阻锚索取15.3 m时,能够达到有效减小超前应力集中,控制留巷顶底板移近量小于400 mm,两帮回缩量小于500 mm的目的,留巷满足后期使用要求,有效缓解矿井衔接紧张局面,提高了资源采出率,为矿井今后沿空留巷的推广使用提供依据。In response to the current situation of deep burial in mines and tight connection of resource depletion,the application of pillar free mining technology in goaf retaining roadway along the 2-300 working face of Ganhe Coal Mine is the research object.Through the reinforcement support technology of constant resistance anchor cables,directional energy accumulation pre splitting and roof cutting technology of deep roof holes,temporary support technology of portal brackets,and the application of gravel slope blocking and anti leakage technology,an implementation plan for goaf retaining roadway has been developed,and on-site underground tests and mine pressure monitoring have been conducted,The monitoring results indicate that when the coefficient of fragmentation and expansion of the working face roof is taken as 1.31,the depth of the cutting top hole is taken as 13m,and the constant resistance anchor is taken as 15.3m,it can effectively reduce the concentration of advanced stress,control the movement of the top and bottom plates of the reserved roadway to be less than 400mm,and the shrinkage of the two sides to be less than 500mm.The reserved roadway meets the requirements of later use,effectively alleviates the tight connection situation of the mine,improves the resource extraction rate,and provides a basis for the promotion and use of the reserved roadway along the goaf in the future of the mine.

关 键 词：沿空留巷 切顶卸压 恒阻锚索 碎胀系数 

分 类 号：TD322.5[矿业工程—矿井建设] TD353