Abstract: Liuhuanggou Coal Mine is a high gas mine, W (9-15) 102 working face is the first mining face, which is laid in 9-15^# coal seam, the average thickness of coal seam is 32.94 m, slicing mining. The coal seam is easy spontaneous combustion coal seam, the shortest combustion period is 17 days. Due to the huge and heavy mining equipments, the recovering of working face needs a long time. During mechanized mining support removing period, spontaneous combustion accidents are easily occurred bacause of the float coal on top part of the support and goaf. Therefore, it is necessary to analyze spontaneous combustion reasons during recovering at fully mechanized caving face. Pressure plugging, water injection, nitrogen injection, grouting, the glue and other comprehensive fire prevention measures are taken to ensure safety production.