Fire Preventing and Extinguishing Technology for Not Easy Spontaneous Combustion Seam at Fully Mechanized Caving Face During Withdrawal Period

Aiming at not easy spontaneous combustion coal seam of Shangzhuang Coal Mine under the effect of deep mining, geological structure, sulfur of coal seam, the spontaneous combustion period becomes shorter and the spontaneous combustion occurred at 503 working face of during the withdraw period. To guarantee safety production of the coal mine, to strengthen the fire prevention requirement of not easy spontaneous combustion coal seam, we build the fire prevention system mainly in tree-phase foam, and reduce the gob air leakage, strengthen monitoring, increase advancing speed to guarantee the safety of the work face in the withdrawal period.