Gas management is a difficult problem at the blasting and caving face in high gas mine. It restricts the safe production of coal mine.

在高瓦斯矿井中，炮采放顶煤工作面的瓦斯治理工作一直是个难题，它严重制约着煤矿的安全生产。

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There are 42 mine Wells in four major mine areas, Jixi, Hegang, Shuangyashan and Qitaihe, in Heilongjiang province, China, 70%of which are high gas mine Wells.

黑龙江鸡西、鹤岗、双鸭山和七台河4大主要矿区有矿井42个，其中70%都是高瓦斯矿井。

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There are 42 mine Wells in four major mine areas, Jixi, Hegang, Shuangyashan and Qitaihe, in Heilongjiang province, China, 70% of which are high gas mine Wells.

黑龙江鸡西、鹤岗、双鸭山和七台河四大主要矿区有矿井42个，其中70%都是高瓦斯矿井。

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This is the same gas responsible for recent coal mine accidents, and it can infiltrate the water reservoir if there is too much pumping, which creates a pressure draw down.

FORBES: Slurring Natural Gas With Flaming Faucets And Other Propaganda

Private equity backed 2Co wants to build a new coal plant above the Hatfield coal mine and pump the gas to North Sea oil fields where it can be used for enhanced oil recovery.

BBC: Carbon dioxide from industry could be buried offshore

They are encouraging drillers to use tainted coal mine water to hydraulically fracture gas wells in the Marcellus Shale formation, with the twin goals of diverting pollution from streams and rivers that now run orange with mine drainage and reducing the drillers' reliance on fresh sources of water.

WSJ: Pa. pushes drillers to frack with coal mine water