Abstract:By using sedimentology, structural geology, coal geology and mathematics methods, geological factors which will influence gas emission, such as geological structures, roof and floor rocks, the thickness of the overlying bedrocks and other factors have been analyzed comprehensively. Gas content and gas emission in Yangcheng area have been predicated, and the contour map which showing gas content and emission of the whole coal well has been made as well. It is showed that Yangcheng coal mine is a low gas content mine. The change of gas content is mainly related to the depth of coal layers. Accompanying with thickness of overlying bedrocks and the increase of the depth of coal layers, the gas content and emission have a rising trend from north to south part in this area.