According to the small capacity of the present underground mine conventional drilling rig,the short gas drainage period and the serious disproportions phenomenon of the mine excavation,drainage and mining percentages,the VLD-1000 and ZDY6000LD mode underground mine 1 000 m directional drilling rigs were applied base on the excavation of the coal mining face,the mining connection and the design of the gas deposit features in the target zone,and the layout of the drilling ring site.The paper in detail introduced the drilling operation process,construction condition and the gas drainage effect.In comparison between the 1 000 m directional drilling and the traditional and conventional drilling technique,the single drilling borehole space of the directional borehole,the percentage of the borehole and coal borehole,the gas drainage concentration were 6.0,2.3 and 2.0 times of the insitu seam borehole individually.The directional drilling borehole would have high gas drainage rate,a longer pre-drainage period,high suitable drilling construction,large covered scope of the borehole and other features.%针对目前井下常规钻机能力偏小,瓦斯预抽期较短,矿井掘抽采比例严重失调的现象,采用VLD-1000型和ZDY6000LD型井下千米定向钻机,根据工作面掘进、回采接续和目标区域瓦斯赋存的特点设计、布置钻场钻孔。详细介绍了钻孔施工过程、施工情况及瓦斯抽采效果,千米定向钻进相比于传统常规钻进工艺,定向钻孔的单孔成孔距离、钻孔煤孔比例、瓦斯抽采浓度分别为原穿层钻孔的6.0、2.3、2.0倍,具有瓦斯抽采率高、预抽期延长、钻孔施工适应性强、钻孔覆盖范围大等特点。
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