The Influence of Coal Consistent Coefficiet on Gas Migration

Based on the triaxial permeability experiment data under the condition of the different consistent coefficient,and combined with the basic theory of seepage mechanics,this paper deduced the gas seepage equation which took into account the condition of consistent coefficient,and built the model which was based on the No.8 coal seam of Wulunshan Coal Mine in Guizhou.The finite element software COMSOL Multiphysics was used to carry out calculation and simulation,it obtained the variation law of gas pressure,content,velocity and permeability in coal seams with the influence of consistent coefficient,the simulation results kept good consistency with experimental conclusions.