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斯科钦斯基矿业研究所研究出了两种抽放煤层瓦斯的方法。这两种方法不用采取专门的煤层水力压裂和水力割缝的措施就能提高抽放瓦斯的效果。因为在工作面前边的煤层内有一个裂隙提高带,所以第一种方法是用斜向工作面的钻孔(图 a)超前抽放瓦斯。在矿山压力影响带(平行于工作面平面)的范围内,出现了技术因
The Skocinsky Institute of Mining has developed two methods of pumping coal seam gas. Both of these methods can increase the efficiency of gas drainage without resorting to special measures of hydraulic fracturing and hydraulic kerfing of coal seam. Because there is a zone of fissure in the coal seam in front of the working face, the first method is to use advanced boreholes (Fig. Within the area of the mine pressure influence zone (parallel to the plane of the face), technical considerations have emerged