Research Of Coal Spontaneous Combustian Prediction Of 1391 High-Grade Working Face In Jin Qiao Mine

The coal spontaneous combustion is one of the serious mine disasters. And above 90% spontaneous combustion occurs in goaf. In goaf the float coal spontaneous combustion disaster affects seriously the safe production of the coal mine. the goaf spontaneous combustion not only to be decided by the raw coal itself spontaneous combustion characteristic, moreover concerns the main roof compression resistance, roof fallen, compaction condition, working surface advancement speed influence factors and so on. There is important significance for guiding preventing and putting out fire and safety production that marking off danger zero of coal spontaneous combustion in goaf exactly and doping coal burning period and the distributing chart of high temperature spot. This article marked off the distribution chart of oxygen concentration & coal ply & air leak intensity by locale observation and academic calculation. According the calculated ultimate parameter, it also marked off the danger zero chart of coal spontaneous combustion in goaf and calculated the limited velocity of working face. Then.it doped out the coal spontaneous combustion degree in 1391 working face goaf of Jin Qiao mine with the two methods which was validated by the locale practice. The determinant and prognosticate result which are disposed with resemble simulation can be applied in other similar goaf and guide preventing and putting out a fire.