简介:WithanextendedLangmuirisotherm,aRiemannproblemforone-dimensionalbinarygasenhancedcoalbedmethane(ECBM)processisinvestigated.AnewanalyticalsolutiontotheRiemannproblem,basedonthemethodofcharacteristics,isdevelopedbyintroducingagasselectivityratiorepresentingthegasrelativesorptionaffinity.Theinfluenceofgasselectivityratioontheenhancedcoalbedmethaneprocessesisidentified.