supported by the National High Technology Research and Development Program of China (863 Program,Grant No.2006AA06Z236);the National Basic Research Program of China (973 Program,Grant No.2009CB219606);the National Natural Science Foundation of China (Grant No.40974056)
For a two layered coalbed system in possession of the slightly permeable interlayer, a mathematical model was established to describe the methane and water flows between coal seams and the internal migration and the d...