深部破碎围岩大倾角下山掘进技术实践

Practice of the high inclination-angle tunneling technology in the roadway with fractured surrounding rock

宁东矿区羊场湾煤矿140201工作面围岩环境复杂,埋藏深,受多重应力影响围岩破碎,断层裂隙水和向斜轴承压水影响严重,巷道最大坡度-37°,给巷道掘进带来极大困难。在综合论证的基础上,分析了现场施工过程中存在的主要影响因素,提出了相应的解决方案,创造性的实现了破碎围岩、断层和向斜影响、淋水大、-37°下山机掘工艺,为该矿以及宁东矿区类似条件的巷道施工,提供了宝贵现场经验,取得了显著的安全经济效益,具有较大的推广意义。

In No. 140201 working face of Yangchangwan coal mine in Ningdong mining area,the surrounding environment is complex,the buried depth is deep,the surrounding rock is broken,the water hazard is serious,and the maximum gradient is -37°,and thus it is quite difficult for roadway driving. By analyzing the main influencing factors in roadway driving process,the corresponding solutions were proposed,as well as the roadway driving and supporting was ensured in complicated conditions. The results have provide valuable experience for roadway construction in similar conditions in Ningdong mining area.