Abstract: We met the phenomenon of abnormal gas emission when return air shaft was building and tunnel was digging. We concluded that the gas source is from sandstone containing rich gas. How to determine the distribution of the gas-bearing sandstone and its impact on the production of the mine has become the most important issue to be resolved. For mine geological characteristics and actual driving conditions, we studied exploration program for gas sands, and the gas distribution and gas-bearing sandstone distribution within the scope of the first mining, obtained weathering and gas overlying strata distribution laws at the first mining scope, proposed targeted treatment recommendations.