氧体积分数与煤低温氧化动力学参数的相关性研究

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

针对煤矿采空区、储煤仓、封闭区等低氧浓度环境中遗煤可能自然发火实际情况,通过煤低温氧化实验,得出了氧体积分数与义马侏罗纪煤低温氧化动力学参数的相关性,即:随着供气氧体积分数的减小,缓慢氧化蓄热期逐渐延长,但快速氧化阶段表观活化能受影响较小,并确定出氧体积分数11.7%可作为义马矿区侏罗系煤层防灭火工作中参考上限临界值。

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.