Adopting the parameters measure equipment for CH4 adsorption of coal,the effects of moisture and temperature to CH4 adsorption of coal were studied.The results have important meaning to perfecting indirect methods for measuring the gas quantity absorbed in coal.Using four coal samples at different metamorphic stages,isothermal adsorption experiments at dryness and different moistures were carried out.The fit precision of Langmuir adsorption model is best.The emendation equation for moisture effects on adsor...