Practice and Rapid Control Technology of Large Firing Zone in Shallow Depth Seam

According to the firing zone distribution unknown, high firing tendency, wide firing scope, a single small flow fire control technology would be slow to cont rol the firing caused by the coal spontaneous combustions in the small abandoned coal mine during the mining process of Antaibao Surface Mine.A comprehensive fire control and temperature reduction technology combined with the survey technology based on the electric thermal complex response in the developing area of the firing zone, the two phase foam backfill in the large cavity and the loose high temperature zone, the water and three phase foam interactive temperature reduction in coal and rock well compact zone and the surface ground oxygen isolation was applied.Within nine months only, a firing zone with area of 227 000 m2 in Antaibao Surface Mine W as completely controlled, which could provide references to control the firing zone of the shallow depth seam in Xinjiang, Inner Mongolia, Shanxi and other areas.