Mechanism research about effect of in-situ stress on coalbed permeability

In the light of model about pore structure in crack reservoir and elastic dynamic principle,the study of mechanism about effect of in-situ stress on coalbed permeability,and the relationship between in-situ stress and coalbed permeability is derived. The conclusion of theoretical derivation is accordance with macro-statistic analysis results,and mechanism about effect of in-situs tress on coalbed permeability is discovered.