店坪煤矿9-204正巷返修工程实践

Practice of 9-204 Main Lane Rework Project in Dianping Coal Mine

针对店坪煤矿9-204正巷围岩失稳破坏严重而亟需返修的问题,本文通过现场调研、理论分析确定了巷道返修支护参数,制定了挑顶、扩帮及卧底的施工方案。对返修后的巷道进行矿压监测发现:返修后的9-204正巷周边煤岩层位移较小,巷道受工作面超前支承压力影响导致周边煤岩层的位移量增加明显,但均在合理范围之内。

Aiming at the problem that the surrounding rock instability and destruction of 9-204 main roadway in Dianping Coal Mine is serious and needs to be repaired urgently,this paper determines the parameters of roadway repair and support through field investigation and theoretical analysis,and formulates construction schemes for roof picking,expansion and undercover.Mine pressure monitoring of the roadway after repair found that the displacement of the coal and rock layer around the 9-204 main roadway after repair was small,and the displacement of the surrounding coal and rock layer due to the influence of the leading bearing pressure of the working face increased significantly,but they were all within a reasonable range.Inside.