The acid water in coal pit can be well controlled by adding calcium carbonate and lime.

阐述通过添加碳酸钙和石灰，可使酸性采煤坑水得到很好治理。

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Police say a power cut is compromising the ventilation system in the Pike River Coal Pit in a remote part of the country's South Island.

警方说，停电影响了该国南岛偏远地区的派克河煤矿矿井的通风系统。

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Four miners were still trapped in a flooded coal mine in Shanxi. The accident occurred Friday afternoon in a coal pit run by the Lingshi coal mine.

山西省灵石煤矿有限公司15日下午发生透水事故，当班6人中只有2人安全出井，目前尚有4人被困。

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Operations at the open coal pit continued, and the company got slapped with a tax fine.

FORBES: Power Putsch

It would keep power prices up, at the expense of everyone except these generators, coal miners and pit owners.

ECONOMIST: Blame it on the boogie

Caterpillar's dump trucks hauled the first coal out of the pit.

FORBES: Magazine Article