Abstract:
Based on the analysis of the reason for spontaneous combustion of goaf residual coal and the goaf spontaneous combustion dangerous area of mechanized face with low advance degree, the comprehensive fire prevent and control measures were made and applied in goaf, which included controlling air leakage, two lane top-coal resistance, slurry pressure injection, gel pressure injection, nitrogen pressure injection and so on, and the width of the oxidation heating zone and the CO concentration of the working face upper corner was reduced, the effective prevention and control of goaf spontaneous combustion of working face with low advance degree was achieved. The site application results showed that the measures were practical and effective.