The influence of aquifer upon the mining coal seam is estimated.

预测了侏罗系含水层对煤层开采的影响。

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Successful predicting and controlling technology for safety mining coal on the aquifer with high-pressure are provided.

为深部煤层高承压含水层上安全开采提供了一套较成功的预报和控制技术。

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Mining coal is one of primary factors to damage land resources, it not only decreases cultivated area, but also causes environment of mine destruction.

煤矿开采是对土地资源破坏的主要部分之一，不仅使耕地面积减少，而且造成矿区环境的破坏。

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Mining of coal and logging of the forests became major industries as transportation improved on the rivers and railroads were built.

VOA: special.2009.07.20

He did any kind of work he could find: Farming,coal mining,brick-making.

VOA: special.2010.08.01

This song is about the dangers of coal mining.

VOA: special.2010.06.13

By Afghan government estimates, as many as a third of the nation's children more than 4 million take part in some sort of work, from picking fruit to mining coal.

WSJ: Teenager Films Afghan Child Labor

So it can buy royalty streams from coal mining companies (most collect royalties from reserves as well as mining their own coal) at five to seven times cash flow and still boost returns to its own unit holders.

FORBES: Magazine Article

Later that same year, Clinton accompanied Giustra to Colombia, where another of Giustra's mining concerns was brokering a coal mining operation.

CNN: Commentary: Thorny thicket of Bill and Hillary Clinton conflicts?