In this book, the authors mentioned the computational fluid dynamics (CFD) applications for mining engineering. Firstly, the ANSYS program is briefly explained and the literature is examined. Rock mechanics is an essential subject for mining engineering. It is modeled to inform the material properties. A tough stone was given for example. The mine ventilation is done correctly to prevent explosions. Therefore, the fan blade design and fan performance are modeled. The methane and air mixture (two-phase) behavior is also simulated in an underground coal mine. Dust modeling is done to prevent dust explosions in underground mines. Finally, the sealing material as concrete is modeled in underground mines.