Research on occurrence characteristics of coalbed methane resources in abandoned goaf and extraction effect of surface wells-taking Xinghua Cola Mine in Jixi mining area as an example
Hou Kai
Hu Jiang
Li Mi
Wang Bo
Abstract：Taking the ground well extraction of coalbed methane from the abandoned coal mine goaf of Xinghua Coal Mine in Jixi mining area as an example,the occurrence characteristics of coalbed methane in the abandoned mining area were analyzed,the scope of gas storage space in the abandoned mining area was studied,the influence of the"O"shaped fracture circle on the occurrence of coalbed methane was clarified,and the constraints of resource occurrence conditions in goaf on the construction of ground wells and gas produc-tion characteristics of ground wells were defined.Research results indicate that when ground wells are deployed in goaf with abundant coalbed methane resources,high resource abundance,and good resource preservation conditions,and when the well locations are con-structed in the fully decompressed area of the"O"shape fracture zone in goaf,a stable production of 10 000 m3/d of coalbed methane with a methane concentration ranging from 28％to 58％can be achieved.
Keywords：goafcoalbed methaneground welldrainagegas storage space
Publication Date：2025-12-30
Online Publishing Date：2026-01-31(First online date of this platform, not the publication date of the document)
Pages：6( 143-147,153 )