掘进巷道煤壁片帮机理及控制技术

Mechanism and Control Technology of Coal Wall Flaking in Roadway Excavation

针对七一煤矿9105运输顺槽掘进期间位于巷道720~740 m巷帮出现片帮现象,导致巷道空顶面积大、巷帮支护失效等技术难题,提出"注浆+桁架锚杆"联合支护技术。通过实际应用效果来看,采取联合支护技术后,控制了煤柱片帮现象,缩小了顶板空顶距,取得了显著应用成效。

Aiming at the technical problems such as the phenomenon of flaky gang in the roadway of 720-740 m during the excavation of 9105 transport chute in Qiyi coal mine,which leads to the large area of empty roof and the failure of roadway gang support,the joint support technology of "grouting + truss anchor" is proposed,and the practical application effect shows that after adopting the joint support technology,the phenomenon of flaky gang in the coal column is controlled,and the empty roof distance is reduced.Through the practical application effect,the joint support technology has controlled the phenomenon of coal pillar flaking gang and reduced the distance between the roof and the empty roof,which has achieved significant application effect.