低渗透煤层钻孔与水力割缝瓦斯排放的实验研究  

Testing study of methane drainage by bore and hydraulic-cutting seam from low permeability coal seam

作　　者：段康廉[1] 冯增朝[1] 赵阳升[1] 胡耀青[1] 杨栋[1] 

机构地区：[1]太原理工大学矿业工程学院,山西太原030024

出　　处：《煤炭学报》2002年第1期50-53,共4页Journal of China Coal Society

基　　金：国家杰出青年基金资助项目 (5 962 5 40 9) ;山西省自然科学基金资助项目 (9810 2 5 )

摘　　要：介绍了特大煤样采用水力割缝提高瓦斯渗透率的实验研究 .实验表明 ,割缝能提高瓦斯的排放量 ;当埋深 4 0 0m时 ,割缝较钻孔的瓦斯排放量提高 2 5 % ;相同埋深的煤层 ,割缝后 ,初期瓦斯排放速度急增 ,为钻孔的 2 0～ 2 5倍 .The testing research about enhancing permeability rate by hydraulic cutting seam on outsize coal sample is introduced. This research shows that permeability capacity could enhance by hydraulic cutting. The permeability capacity increase by 25% by cutting seam than by drilling under 400 m degree of depth, the initial permeability rate increase by 200%～250% under same degree of depth. This study aids to develop pumping gas from hard permeability coal seam and exploiting coal gas.

关 键 词：低渗透煤层 水力割缝 钻孔 瓦斯渗透率 瓦斯排放 

分 类 号：TD712.6[矿业工程—矿井通风与安全]