The incident began at 09:15 BST on Thursday when emergency services were called to the drift mine at Cilybebyll.
事故发生于星期四的9:15，并向Cilybebyll的矿井发出紧急呼叫。
The indoor experiment on the filling materials used for downward slicing drift mining with cemented backfill in Gaolong Gold Mine was performed.
对高龙金矿下向分层进路胶结充填采矿法所用的充填材料进行了室内试验研究。
This paper describes main technical characteristics of underhand drift hydraulic sand filling method and its successful application at North Part of Wushan Copper Mine.
简述了铲运机出矿的下向进路式水砂充填采矿法的主要技术特点和在武山铜矿北矿带的成功应用。
If stress concentration factor expression for rectangular drift opening is known, it can be of great help in the design and support of mine horizontal rectangular drift.
若能了解矩形巷道孔边的应力集中系数表达式，则对矿山水平矩形巷道的设计和支护都有很大的帮助。
Upwards drift hydraulic fill mining is one of the main mining methods used in Wushan Copper Mine.
上向进路水砂充填采矿法是武山铜矿主要的采矿方法之一。
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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