Correlation Between Oxygen Concentration and Dynamic Parameters of Low Temperature Coal Oxidation

Spontaneous combustion of residual coal likely occurs in the goaf,storage bunker,sealed area,where the oxygen concentration is lower than the air,through the experiment of low temperature coal oxidation,the paper analyzed the correlation between oxygen concentration and dynamic parameters of Jurassic coal from Yima mine oxidation at low temperature. The result shows that, slow oxidation regenerative period gradually extends with a decreasing oxygen concentration; while in the rapid oxidation stage, the apparent activation energy is hardly affected by oxygen concentration,and the oxygen concentration of 11. 7% can be used as reference upper threshold in the process of Yima mine fire prevention.