Based on the occurrence and migration law of coalbed methane,and the analysis of coalbed methanedesorption from matrix of coal by way of channeling and diffusion,through the process from which the cleat tothe production borehole by way of permeation and diffusion,then coupling the unequilibrium adsorption model ofcoalbed methane in the Millipore with gas-water two-phase percolation model together,the Dual media coalbedmethane reservoir simulation steady state percolation mathematical model is formed.A homol...