... 边掘边抽 gas drainage with drivage 穿层钻孔 crossing hole 顺层钻孔 hole drilled along seam ...
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此外，本文还对顺层钻孔和穿层钻孔抽采煤层气的工艺技术进行了详尽的技术经济比较。
Besides, elaborate technology economy compare about the technics and technology of mining coal bed methane by drilling borehole down and cross the seam is carried out.
本论文主要是针对远程下保护层开采条件下，对底抽巷上向穿层钻孔抽放远程卸压瓦斯技术进行了深入的研究。
This paper mainly researches on the technique of draining long distance pressure relief gas in bed plate tunnel under the circumstance of mining protective coal seam.
消突效果检验后进行煤巷掘进，掘进期间通过对突出危险性指标和瓦斯涌出参数的分析，验证穿层钻孔区域预抽瓦斯消突技术的有效性；
The outburst risk index and gas gush feature are analysed during roadway progress. The result proves that the effectiveness of zonal gas pre-drainage by cross-measure boreholes.
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