Karst collapse colum in North China already becomes one of the main geological disaster in mine mining.

华北地区岩溶陷落柱已成为矿井开采中最主要的地质灾害之一。

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Optimizing roadway arrangement way unceasingly, reducing the tunnel drivage ratio is an important task in the mine mining design process.

不断优化巷道布置方式，降低巷道掘进率，是矿井开采设计过程中的一项非常重要任务。

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It is a significant problem of mining area subsidence resulting from underground coal mine mining, which resulted in soil resources destruction, even a lot of waterlogging in the high water level.

因地下煤炭开采导致的矿区塌陷是目前矿区的主要问题之一，这些塌陷造成土地资源破坏，在高水位甚至出现积水。

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In the past few years, Baomahun town has mushroomed as people rush to mine the land before it is taken over by the British mining company, Cluff Gold, whose 137 kilometer concession includes the artisanal mining pits.

VOA: standard.2010.04.22

Representatives of the mine owner, the San Esteban Mining Co.

CNN: After a final day together, miners begin to disband

Emperor Gold Mining, which runs Vatukoula mine, faces big losses because of a trade ban by Australian trade unions.

ECONOMIST: The Pacific

It currently owns a 40 percent share of the mine with the remaining interest owned by mining company Rio Tinto, as Rio has stated a desire to pull out of the diamond business.

FORBES: Former Harry Winston Diamond Corp. Q4 Sales Up 8%; Ekati Mine Acquisition Is Approved; Luxury Brand CEO Reportedly Resigns