Abstract: The coal seam of Bulianta Coal Mine has the features of shallow mining depth, close distance and easy spontaneous combustion. Due to the mining effect, 22306 working face may exist communication cracks together with the overlying 12 coal goaf. The 12 coal goaf had happened fire hazard. If the residual coal occurs spontaneous combustion again, the 22306 working face safe will be threatened. The nitrogen will be injected in the process of drainage. The overlying goaf will be pre-grouted. The scope of 300 m open-off cut, the middle abnormal area, the scope of the 300 m end mining will be grouted. The pressure balance for air control will be adopted in the emergency situation. The 22306 working face safe mining will be guaranteed through the above methods.