Study on Application of Grouting Fire Prevention and Control with High Level Tube in Goaf Between Hydraulic Powered Supports of Fully-Mechanized Coal Mining Face

In order to solve a fire prevention and control problem of the goaf with top coal roof, a grouting fire prevention and control technology with high level intu bation in goaf between the hydraulic powered supports of No.1622 (3) coal mining face in Pansan Mine. The study results showed that the grouting fire prevention and control technology could make up the shortages of the grouting with the pipeline buried at the top corner of the coal mining face, the grouting spraying over the coal min ing face, nitrogen injection with the pipeline buried in the transportation gateway, the grouting with the boreholes in along the roof strike of the railway gateway and othe 「technical measures and could enlarge the grouting scope in the goaf with top coal roof. The technology could improve the reliability of the grouting fire prevention and control technology and could effectively prevent the oxidization of the left coal with remarkable fire prevention effect.