摘要
为了研究高压水射流割缝对煤层增透及改善瓦斯抽采的效果,设计了3种不同的割缝钻孔布置方式,并在平煤股份十矿己15-24080底位巷进行了现场试验。试验结果表明:射流割缝形成了煤层移动的补偿空间,煤层由紧压状态变为松动状态,裂(孔)隙密度增加形成良好的瓦斯运移通道,改善了煤层的透气性;割缝后钻孔平均瓦斯浓度保持在80%,为对照孔的2.44倍。
In order to study the effect of permeability promotion gas extraction that high-pressure water jet cutting technology has on coal seams, three different lay-outs were designed, and field tests were done in at the middle bottom roadway of Ji15-24080 working face in the 10 th mine of China Pingmei Shenma Group. The test results show: high-pressure water jet cutting technology leads to compensation room, coal seams aren't tight but loose, and a large number of pores and fractures are effective channels for gas transportation, increasing the permeability of the coal seams; after being cutting, mean gas concentration is above 80% and is 2.44 times as much in the notched boreholes as in the control boreholes.
出处
《山东煤炭科技》
2016年第6期56-58,61,共4页
Shandong Coal Science and Technology
基金
国家重点基础研究发展计划(973计划)资助(2014CB239203)
关键词
射流割缝
瓦斯抽放
缝槽布置
影响半径
瓦斯浓度
water jet cutting
gas extraction
notch lay-out
effection radius
gas concentration
