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介绍了岩石水平长钻孔抽放邻近层瓦斯的试验情况 ,根据理论分析和现场观测结果 ,确定合理布孔层位 ,取得了钻孔长度603.9m、单孔平均抽放量20.3m3/min的效果。
According to the theoretical analysis and on-site observation results, the rational layer of holes is determined, and the length of borehole is 603.9m and the average discharge volume of single hole is 20.3m3 / min effect.