The supporting design of mine roadways is reasonable or not directly influences mining-drifting balance, economic efficiency and safety production.
矿井巷道支护设计的合理与否，直接影响着煤矿的采掘接续平衡、经济效益和生产安全。
This paper took level 1280 strike drift of Dragon Head Mine as example to make an approach to the construction technology for drifting in bad strata.
本文以龙首矿1280沿脉巷道为例，对不良岩层中掘进的施工技术进行了探讨。
应用推荐