Dashe Mine with coal and gas outburst and exhausted mining resource, the mining depth increasingly, with complex coal seam occurrence conditions, some protective layer without the mining condition, consequent layer pre-drainage was adopted in mining roadway to remove the outburst, drilling combining goaf brought difficulty in fire prevention and control. Upper transportation roadway of Dashe Mine was taken as example, the range of gas discharge pressure of goaf inclined lower side coal was analyzed.