高压水射流割缝钻孔的布置方式对瓦斯抽采效果影响  

Test Study on Gas Extraction of Different Lay-outs of Notched Boreholes Using High-Pressure Water Jet Cutting Technology

作　　者：李东洋[1] 粟登峰[1] 严福文 

机构地区：[1]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400044

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)

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.

关 键 词：射流割缝 瓦斯抽放 缝槽布置 影响半径 瓦斯浓度 

分 类 号：TD712.6[矿业工程—矿井通风与安全]