煤田地质与勘探Issue(1)：100-103,4.DOI:10.3969/j.issn.1001-1986.2015.01.021
“三软”单一煤层水力冲孔卸压增透机理及现场试验
The mechanism and field test of permeability improvement by hydraulic flushing in three-soft and single coal seam
冯文军 1苏现波 1王建伟 2秦俊宾 2李贤忠1
作者信息
- 1. 河南理工大学能源科学与工程学院，河南 焦作 454003
- 2. 郑煤集团公司大平煤矿，河南 登封 452373
- 折叠
摘要
Abstract
Hydraulic flushing is the most effective way for high-efficient extraction in three-soft coal seam. In this paper, the mechanism was studied by laboratory experiment, theoretical analysis and field test for pressure relief and permeability improvement in three-soft coal seam after hydraulic flushing. The coupling experiment of stress and strain-coal structure-permeability revealed the evolution of permeability along with the change of the structure and stress, and found that permeability of soft coal was improved on a large scale after pressure relief. Based on Hoek-Brown criterion theory, the numerical simulation results show that the relief range increased significantly af-ter hydraulic flushing in coal. The hydraulic flushing tests using self-developed machine for gas drainage borehole in 21141 floor drainage tunnel of Daping Mine shows, the machine made hydraulic flushing more secure and effi-cient, and made it possible to repair the old drainage borehole . The field tests fully tested the reliability of the equipment and the accuracy of the above theoretical analysis, and improved the extraction efficiency significantly.关键词
“三软”煤层/水力冲孔/卸压增透/瓦斯抽采Key words
three-soft coal seam/hydraulic flushing/pressure relief and permeability improvement/gas drainage分类
建筑与水利引用本文复制引用
冯文军,苏现波,王建伟,秦俊宾,李贤忠..“三软”单一煤层水力冲孔卸压增透机理及现场试验[J].煤田地质与勘探,2015,(1):100-103,4.
