杜儿坪煤矿72909工作面切顶卸压护巷技术应用与实践

Application and practice of roof cutting and pressure relief roadway protection technology in 72909 face of Du'erping Mine

杜儿坪煤矿在南九盘区72909工作面推广应用了切顶卸压护巷技术,通过在72909皮带巷不采帮侧开展切顶卸压、预裂切缝、预裂爆破施工,对邻近72909瓦斯预抽巷围岩进行了保护,加强了该巷道切顶护巷支护工艺,延长了巷道服务年限,减小了因采动压力影响而造成的巷道变形量增大,降低了巷道维护治理费用。

Du’erping Mine applied "roof cutting and pressure relief roadway protection technology" in 72909 working face of Nanjiupan District. Through roof cutting and pressure relief, pre-splitting and pre-splitting blasting was constructed on the side of non-mining side of 72909 belt roadway, the surrounding rock of adjacent 72909 gas pre-drainage roadway was protected, the roof cutting and roadway protection technology was effectively strengthened, the service life of roadway was prolonged, and the influence of mining pressure caused by roadway deformation was reduced, with the lower cost of roadway maintenance and treatment.