Research and application of high-pressure water jets drilling and repairing failure drainage borehole for enhancing coalbed methane recovery in underground coal mines

• Published in: Geomechanics and geophysics for geo-energy and geo-resources. Vol. 8; no. 6
• Main Authors: Xiao, Songqiang, Ren, Qingyang, Cheng, Yugang, Wang, Haiyang, Zhang, Liang, Liao, Yin, Chen, Bin, Jin, Honghua, Meng, Xin, Qin, Haoxin
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.12.2022; Springer Nature B.V
• Subjects: Boreholes; Bottom trawling; Breaking; Coal; Coal mines; Coal mining; Coalbed methane; Critical pressure; Debris; Detritus; Discharge; Drainage; Drainage effects; Dredging; Drilling; Dynamic loads; Efficiency; Energy; Engineering; Environmental Science and Engineering; Exploitation; Failure; Foundations; Geoengineering; Geophysics/Geodesy; Geotechnical Engineering & Applied Earth Sciences; High pressure; Hydraulic jets; Hydraulics; Jets; Methane; Original Article; Pressure; Recovery; Rock; Rocks; Underground mines; Velocity; Velocity distribution; Water; Coal rock breakage; Gas drainage borehole; Water jets; Coalbed methane

Draining gas from coal seams in underground coal mines is the main method of the coalbed methane exploitation in China. When the gas drainage boreholes are located at soft, fractured coal rock seams, phenomena such as borehole collapse and blockage occur frequently, resulting in the significant decr...