Actual measurement analysis of three zones of goaf of 14308 working face with fully mechanized caving method of Dong tan Mine

In view of the serious state of spontaneous combustion in the goaf of the 14308 working face of Dong tan Mine, through drilling, the gas is inspected and sampled periodically, and the concentration of oxygen is analyzed with the chromatographic instrument, the specific ranges of the three zones according to the concentration of oxygen is given using the cubic spline interpolation method and the distribution of three zones is gained, and it offers trusty criterion for the measurement of fire extinguishing and prevention on the working face.