Abstract:In this paper, by using tectonics, sedimentology and mathematical model analysis, basic geological conditions of Baodian coal mine and different factors which will effect gas occurrence are introduced briefly. Main geological factors effected gas occurrence in the study area, including geological structure, rock property of roof overlying and thickness of bedrock are introduced as well. Thus, gas emission rule of Baodian coal mine is summarized. It is regarded that gas emission amount is high in northeast part, while low in southwest part.