Abstract：For test the characteristic parameter of nonlinear flow for coal rock, relying on the design coal rock permeability characteristics test equipment which got authorized patent of invention, using the seepage equations considering adsorption effect, deduces analytic solution of one- dimensional directional flow. Combined the analysis of dynamic characteristics, expounds the connotation of the effect for absorption in the nonlinear flow for coal rock, forms the test method to calculate the characteristic parameter of nonlinear flow for coal rock. This test method is important in the study of gas migration mechanism in coal rock.

Keyword：gas;absorption;nonlinear flow;