methane drainage borehole 沼气排气钻孔
non-methane drainage 非甲烷烃排放
coalbed methane drainage 煤层气排采
relieved methane drainage 卸压瓦斯抽放
methane drainage by ventilation 风排瓦斯
Disposed Methane Drainage Technology 卸压瓦斯抽采技术
Huainan coalfield is rich in coalbed methane resources and has large - scale coalmine methane drainage.
淮南煤田煤层气资源丰富，煤层气抽采具备较大规模。
High position bores and elevation bores methane drainage technique can prevent gas problem successfully.
采用高位钻孔和仰角钻孔抽放瓦斯技术，有效地防止了瓦斯超限。
The result shows that it is a very good path to improve methane drainage effect by using the way and deserves to be popularized and applied.
试验结果表明，该方案明显提高了低透性煤层的瓦斯抽放效果。
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