煤炭工程 ›› 2015, Vol. 47 ›› Issue (11): 120-123.doi: 10.11799/ce201511038

• 研究探讨 • 上一篇    下一篇

氧体积分数与煤低温氧化动力学参数的相关性研究

苏贺涛,宋小林,史波波   

  1. 中国矿业大学安全工程学院
  • 收稿日期:2015-01-13 修回日期:2015-03-07 出版日期:2015-11-12 发布日期:2015-12-07
  • 通讯作者: 苏贺涛 E-mail:suhetao4197@163.com

Correlation between Oxygen Concentration and Dynamic Parameters of Coal Oxidation at Low Temperature

  • Received:2015-01-13 Revised:2015-03-07 Online:2015-11-12 Published:2015-12-07

摘要: 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。

关键词: 氧体积分数, 低温氧化, 表观活化能, 耗氧速率

Abstract: Spontaneous combustion of residual coal likely occurs in the mined-out area, storage bunker, closed zone, etc, where the oxygen concentration is lower than that in the air, so the experiment of coal oxidation at low temperature was made to reveal the correlation between oxygen concentration and dynamic parameters of Jurassic coal from Yima mine oxidation at low temperature. The experiment revealed that slow oxidation regenerative period gradually extended with the oxygen concentration of the supplying gas reducing. But in the rapid oxidation stage, the apparent activation energy is hardly affected by oxygen concentration, and that the oxygen concentration 11.7% can be used as reference upper threshold in the process of Yima mine fire prevention.

Key words: oxygen concentration, low-temperature oxidation, apparent activation energy, oxygen consumption

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