Cause Analysis and Processing of Spontaneous Combustion Tendency in Mechanized Caving Face

The gas emission quantity of N₂906 mechanized caving face was big, the spontaneous combustion period was short, the coal seam spacing was small, and the air leakage volume of goaf was larger, under these conditions, spontaneous combustion tendency took place in the goaf of working face. Based on the production and development laws of spontaneous combustion, it timely took some measures to control the occurrence of spontaneous combustion of mechanized caving face effectively, these measures included strengthening the laboratory analysis, reducing wind and controlling pump, multi-point nitrogen injection in goaf, deep and shallow alternate filling, oblique drilling, and water injection in roadway loose circle.