Abstract：In order to prove if that gas desorption emission is independent on coal particles sphere,the coal particles is assumed as cylinders to be studied. According to Darcy's law,gas emission equation in cylindrical coordinate was establishment using the finite volume method to discrete and be dimensionless. A computer software was designed in Visual Basic to solve the mathematical model. Through comparing and analysing the simulation results with experiment results,it is found that the two fitting degree is very high,and the conclusion once again confirms that gas emission from the coal particles conforms to Darcy's law. Meanwhile,it further explains the coal particle gas emission law and coal particle shapes have no direct relationship.

Keyword：Darcy's law;gas emission;coal particle shape;