The deep underground mining techniques such as rock-burst and high temperature prevention presented he...

介绍的防岩爆、防高温等深井采矿技术，值得同类矿床借鉴。

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Ventilation is a major consideration in underground mining. Many mines are so deep that adequate air must be pumped in; others have problems with heat and humidity.

通风是地下采矿必须考虑的重要问题。很多矿井都很深，因此必须送人足够的空气。有的矿井还有高温和潮湿的问题。

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The stability of horizontal pillars in deep mining is one of the common technical challenges that should be solved urgently for underground metal mines.

深部水平矿柱开采的稳定性问题，是地下金属矿山迫切需要解决的共性技术难题之一。

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These companies brought in mining machines that could dig out the gold from deep underground and separate it from the rock that held it.

VOA: special.2010.03.18

De Beers is active in every category of industrial diamond mining: open-pit, underground, large-scale alluvial, coastal and deep sea.

FORBES: Anglo American Receives Final Regulatory Approval for De Beers Acquisition