So it become the key link solving the gas extraction in low-permeability coal beds to insure in coal mine security and enhance production efficiency.

因此，解决低渗透煤层的瓦斯抽放已成为确保煤矿安全生产，提高煤矿生产效率的关键环节。

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This paper introduces the main gas extraction and drainage techniques used in Yangquan Coal Mine at present and the application scope and deterministic accordance of these techniques.

主要介绍了阳泉煤矿目前主要的瓦斯抽放技术和方法及其适应范围和确定依据。

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Test results of surface gas extraction technology from boreholes in the goaf in Zhangbei Coal Mine, Huainan Mining Group are introduced in the paper.

本文介绍了淮南矿区张北矿地面钻孔抽采采空区瓦斯技术的试验成果。

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