Accurate prediction of the tendency of spontaneous combustion risk in mining coal layers is of great importance in production safety of coal mine.

正确预测开采煤层自燃发火的趋势与危险性，对煤矿安全生产具有重要的指导意义。

youdao

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。

youdao

The process of mining coal and its combustion is associated with extensive air, water and land degradation.

煤炭开采及燃烧过程与大气、水的污染和土地退化密切相关。

youdao

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

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?

Bumi's current management also announced further steps in its plan to consolidate control of another Indonesian coal-mining subsidiary, Berau Coal, of which it owns 85%.

BBC: Bumi board fights Rothschild plan