1) long bedding borehole
顺煤层长钻孔
1.
In coal mine gas drainage methods, long bedding borehole gas drainage can not only improve the drainage volume and pumping efficiency but also reduce the cost of gas drainage, the bedding long borehole gas drainage technology is the development direction.
在煤矿瓦斯抽放方法中,顺层长钻孔不仅可以提高钻孔的抽放量和抽放效率,而且降低了抽放成本,是抽放技术的发展方向,但顺煤层长钻孔施工困难,目前还不能很好的利用其来解决煤矿瓦斯问题,所以解决顺层长钻孔的施工问题成为急需解决的重大技术难题。
2) Drilling long borehole down the seam
顺层长钻孔
1.
Drilling long borehole down the seam is a valid method of mining gas from mining-coal bed, which is an important technology to deal with mine gas calamity and also a new approach of mining coal bed methane.
顺层长钻孔是一种抽采本煤层瓦斯的有效手段,这种技术既是治理矿井瓦斯灾害的重要技术,也是进行煤层气开发的新途径。
3) long-hole along coal seam
沿煤层长钻孔
5) Coal mine drill
煤矿钻孔
补充资料：顺长
1.谓顺其自然生长。
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