Gas flowing model of mining face and solve it using COMSOL

Abstract：This article simulated gas flowing diffusion behavior from leading in solute diffusion translation equation and Fick＇ s law, using Navier-Stokes equations and Brinkman equations to construct the gas flowing model of the mining face and the goaf,and related two models organically in a unified flow field, and established numerical model of gas flowing in the coal mining face based on mass conservation and pressure balance. It can be better getting together that gas emission from intake roadway, ventilation roadway, working face, the goaf and gas diffusion from the mining face. Then the author solved the physical model using the COMSOL Multiphysics system numerical analysis tool, and simulated the gas flow process of the mining face. The model calculated results show that this model can simulate the gas concentration distribution which comes from the mining face and the goal, and contrasts judgment the position of the special gas drainage roadway and the advantages and disadvantages of ventilation mode, it also has determinate application for mining face.