It is a new practical method to predict outburst danger according to gas emission law after shotfiring at coal heading faces.

根据煤巷掘进工作面放炮后的瓦斯涌出规律，预测工作面的突出危险性是一种新型实用的工作方法。

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An old steam engine went slowly by, heading northeast, puffing great clouds of smoke and hauling a train of coal trucks.

一辆老式蒸汽机车喷着浓烟，拖着一节又一节的煤车缓慢地向东北方向开去。

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Advancing hole is one of local prevent outburst measure at coal road heading face in coal-and-gas outburst mine.

超前钻孔是煤与瓦斯突出矿井中煤巷掘进工作面的局部防突措施之一。

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Although the report exonerated Mr Singh, BJP leaders say he must resign as he was heading the coal ministry at the time of the sale.

BBC: India parliament remains stalled over coal scandal

The steamboats will have to navigate a gauntlet of locks and dams, and paddle among huge barges heading downstream laden with coal and petroleum products.

ECONOMIST: Cities and rivers