Recent research progress of the gas-adsorption mechanism in coal

Base on the gas-adsorption study in gas geology and coalbed-mathane geology, the paper selectively summarized research advances in state of gas occurrence, action and models of gas adsorption, control factors of gas adsorption, supercritical sorption of different gases and adsorition of multivariate gases in coal, The questions in present research and the future research trends were were point out.