松软煤层水射流卸压增透技术  

Water Jet Depressurization Increasing Permeability Technology in Soft Coal Seam

作　　者：徐全[1,2] 黄渊跃[1,2] 刘学服[1,2] 方前程[1,2] 杨玉静[1,2] 

机构地区：[1]湖南省煤炭科学研究所,湖南长沙410004 [2]湖南省瓦斯治理与利用工程研究中心,湖南长沙410004

出　　处：《煤矿安全》2013年第9期92-94,共3页Safety in Coal Mines

基　　金：科技部科研院所技术开发研究专项资金资助项目(2011EG122210);湖南省科技厅社发处重点资助项目(2010SK2012)

摘　　要：采用水射流卸压增透技术对低透气性松软煤层进行强化抽采,通过对水射流措施过程中的平均瓦斯涌出量、出煤量、喷孔情况等关键特征进行分析,得出钻孔瓦斯平均涌出速度、出煤量是水射流卸压增透效果的有效考察指标。对于松软煤层来说,钻孔最后一次喷孔的瓦斯涌出量与时间斜率绝对值也是一个重要指标,能较直接地反应水射流措施后的卸压效果。坚固性系数在0.2左右的煤体,径向喷孔的直径在4.00 mm的情况可以较好进行水射流卸压增透。Water jet depressurization increasing permeability technology is uesed to strengthen the gas drainage in low permeability soft coal seam, the key characteristics such as the average gas emission, coal output and jet orifice are analyzed, the average gas emission rate and coal output are proved as good investigation indexes fur water jet depressurizalion increasing pcrmeasility eft＇cot. ofsoft coal seam, the time absolute slope value and gas emission after the last jet orifice are also important investigation indexes, which ecadd show directly the depressurization increasing permeability effect of water jet. Water jet depressurization increasing permeability lechtlology has well effect under the situation of the radial orifice diameter in 4.00 mm and the consistent coefficient of the coal as 0.2.

关 键 词：水射流 松软煤层 出煤量 瓦斯涌出量 卸压增透 

分 类 号：TD712.6[矿业工程—矿井通风与安全]