DOI: 10.11799/ce202311048
Roof water draining technology in shallow and thin bed rock coal seam
WANG Yi
SUN Changmin
Abstract：In order to solve the technical problem of water drainage in shallow and thin bedrock coal seam,taking 31301 working face of Jinjie Coal Mine as an example,by analyzing the water hazard of 31301 working face,the roof drainage test of working face is carried out.From the drilling design,drilling layout,drilling structure,drilling technical requirements,water discharge technical requirements,a set of water discharge technology for shallow and thin bedrock coal seam roof is designed.A total of 101 boreholes have been constructed in this project.The cumulative initial water inflow is 7024.8m3/h,the maximum initial water inflow of a single hole is 147.0 m3/h,the average initial water inflow of a single hole is 69.6 m3/h,and the maximum water inflow during water drainage is 2200 m3/h.The project eliminates the impact of mining water disaster on the working face and reduces the production safety risk.
Keywords：coal mine water hazardshallow coal seamthin bedrockroof water drainageJinjie Coal Mine
Publication Date：2023-12-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 90-94 )