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。
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。
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