Abstract: Aiming at the problems of close distance coal seam group, large gas content and short spontaneous combustion period and other issues in Baijiao Coal Mine, in order to realize low cost and safe recovery of working face under the influence of gas and fire, according to the local conditions of the Baijiao Coal Mine, we propose the technical process of pressure-sharing fire prevention and the theory of nitrogen dynamic compensation under the influence of gas extraction, and take 2274 working face in Baijiao Coal Mine as an example, combine with the influence factors of occurrence condition, coal seam roadway layout, adjacent goaf on the working surface, the application of regional ventilation fire control technology can ensure the mining safety. We summarized the basic principles of nitrogen dynamic compensation, including “nitrogen injection priority, pumping and injection balance, dynamic control and real-time monitoring”, and obtained the influence factors of gas extraction on nitrogen and nitrogen compensation.