Advances in study on seepage flow property of coalbed methane

In the view of probems in non-linear methane seepage flow theory and coalbed methane liquid & solid coupling theory,and difficulties of methane control in the more and more high temperature mines,based on sum-marizing the study evolution of coalbed methane seepage flow at home and abroad,non-linear methane seepage flow theory,earth temperature field effect and methane seepage flow theory,and coalbed methane liquid & solid coupling theory were reviewed especially,and the development trend of research on coalbed methane seepage flow under the effect of geophysical field was indicated.The results showed that deeper study is required in the problem of non-linear methane seepage flow,the problem of high temperature and low permeability methane seepage flow with deep mining and coalbed methane liquid and solid coupling for solving effectively the problem of coal bed methane seepage flow in production.