Abstarct: Ventilation is one of the most important issues in underground mining. Which directly effects on the health of mine workers. In underground coal mines, due to the presence of toxic, flammable and combustion of coal, ventilation become more important issue and designing an appropriate method is required. There are several methods for design and modeling air conditioning, that with advancement of computer technology, Computational Fluid Dynamic (CFD) has become more reliable and most widely used. In this research, the simulation and modeling of air condition in W2 stope of Parvade Tabas coal mine has been studied by CFD approach. In order to modeling, an initial model was made and its results was used in final model. The final model consists of 4 simple models with different characteristics. According to results, highest velocity with 12.9 value is in the middle of cribbing area. Methane gas content is gathered at the end of extraction stope and the entrance of TG panel on upper part of stope (ceiling). Also, there is a susceptible of coal combustion in the upper part of abandoned area and half of height in TG panel. Approximately 40 discontinuities were modeled along the Shield wall during the stope extraction that about 11 discontinuities are open routes for entering methane and enter to ventilation tunnel. Gasification has a very good effect on high concentration of abandoned area and eliminate this high concentration.