高瓦斯煤层高压水力割缝增透技术试验研究  

Experimental Study of High-Pressure Hydraulic Cutting Technology for Increasing Permeability in High Gas Coal Seam

作　　者：王安虎 宋大钊[1,2] 宋宜猛 WANG An-hu;SONG Da-zhao;SONG Yi-meng(Key Laboratory of Educational Ministry for High Efficient Mining and Safety in Metal Mine,University of Science and Technology Beijing,Beijing 100083,China;School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing 100083,China;China Coal Information Institute and National Institute for Occupational Safety,Beijing 100029,China)

机构地区：[1]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083 [2]北京科技大学土木与资源工程学院,北京100083 [3]国家安全生产监督管理总局信息研究院,北京100029

出　　处：《煤炭技术》2018年第9期185-187,共3页Coal Technology

基　　金：国家重点研发计划项目资助(2016YFC0801408);国家自然科学基金重点项目资助(51634001)

摘　　要：为解决高瓦斯低透气性煤层瓦斯含量高、透气性差、抽采效率低的难题,对切割压力高达100 MPa的高压水力割缝增透技术及装备进行试验研究,研究结果表明:长治矿区3#煤层的合理切割压力75 MPa左右、切割影响范围达6 m,经水力切割增透措施后瓦斯抽采量相比原始钻孔瓦斯抽采量最大提高到12.52倍,高压水力割缝技术大大增加了煤层透气性,提高了煤层瓦斯抽采效率。In order to solve the problem of poor permeability and low extraction efficiency in high gas and low permeability coal seam, experimental researched the high-pressure hydraulic cutting technology and equipment which cutting pressure up to 100 MPa. The results show that the reasonable cutting pressure of coal seam is about 75 MPa in Changzhi coalfield, the effective radius of gas cutting after hydraulic cutting can be reached more than 6 meters, and the amount of gas drainage about the hydraulic cut drilling can be increased 12.52 times. Which greatly indicated that the high-pressure hydraulic cutting technology increased permeability of the coal seam and improved efficiency of gas drainage in coal seam.

关 键 词：高压水力割缝 合理切割压力 煤层增透 瓦斯抽采 

分 类 号：TD713[矿业工程—矿井通风与安全]