陕西煤炭2024，Vol.43Issue(7)：20-23,37,5.DOI:10.20120/j.cnki.issn.1671-749x.2024.0704
超高压水射流割压联合技术试验分析
Experimental analysis of ultra-high pressure water jet cutting and fracturing combined technology
刘永三1
作者信息
- 1. 中煤科工集团重庆研究院有限公司瓦斯研究分院,重庆 400037||中煤科工集团重庆研究院有限公司煤矿灾害防控全国重点实验室,重庆 400037
- 折叠
摘要
Abstract
This article focuses on the advantages and disadvantages of hydraulic cutting and hydraulic fracturing pressure re-lief and permeability enhancement technology,and proposes the combined use of hydraulic cutting and hydraulic fracturing technology for pressure relief and permeability enhancement in coal seams.The principle and process technology of com-bined pressure relief and permeability enhancement are analyzed,and on-site experiments are conducted.The results show that using cutting and pressure combined pressure relief and permeability enhancement technology for interlayer drilling can increase the permeability range along the coal seam direction to 55.4～57.1 m,and along the coal seam inclined direction to 52.3～58.6 m;The permeability coefficient of the coal seam is 26 times that of the original coal body,and the permeabil-ity of the coal seam has significantly improved;The average concentration of gas extraction in cross layer boreholes is 34.9％,and the extraction concentration is stable,significantly higher than that in ordinary extraction boreholes;The average pure gas extraction volume is 0.037 5 m3/min,which is 3.47 times that of ordinary boreholes.Under the same drilling ar-rangement,the time for achieving the extraction standard can be reduced by 55％,and the total time investment can be re-duced by 31.8％.This provides a basis for application of cutting and fracturing combined pressure relief and permeability enhancement technology.关键词
水力割缝/水力压裂/割压联合/卸压增透Key words
hydraulic slotting/hydraulic fracturing/cutting and fracturing combination/pressure relief and permeability en-hancement分类
矿业与冶金引用本文复制引用
刘永三..超高压水射流割压联合技术试验分析[J].陕西煤炭,2024,43(7):20-23,37,5.
