The Comprehensive Fire Prevention and Extinguishment Technology at Fully Mechanized Caving Face in Thick Coal Seam

Through the analysis of spontaneous combustion danger in 40104 working face firing area, combined with the actual situation of working face coal bed and the deficiencies of a single fire extinguishing technique in the application process, the paper proposed integrated control scheme of three-phase foam combined with nitrogen injection plugging and the targeted prevention and control for different risk areas. That is using high accumulation and good diffusivity of three-phase foam to uniformly cover residual coal in goaf and high concealment coal spontaneous combustion areas. At the same time, cooperated with sealing technologies of constructing wind break wall on the top and bottom corner.