Abstract: Based on the gas geology theory, taking No.2 Mine of Yangquan Coal Mining Group as an example, the analysis was conducted on the geology structure, seam buried depth, the surrounding rock and hydrological conditions and other factors, then the factors which are in control of gas occurrence such as the seam buried depth and the surrounding rock were discussed. On the basis of the study, targeted prevention and control measures on gas were conducted. Gas drainage based on gas occurrence law and "Double U" style ventilation measures were conducted to provide support for the safety conduction of mine.