fundamental understanding of the goaf gas distribution in a gassy coal mine is necessary for developing effective goaf gas drainage strategies in the longwall coal mine. the goaf gas was subjected to the surface and body forces that were classified depending upon whether they acted on the surface area or the volume of the gas element. of these forces, the body forces were more predominant in di...

Abstract The floodable volume of longwall gob can be great importance in developing accurate coal mine operation plans, particularly for water management and environmental control strategies. Given the inaccessibility difficulty direct measurement characteristics following recompression, hydrologic, geomechanical, spatial data principles were used to solve porosity height residual using a mathe...