矿井闭火区一氧化碳和乙烯的生成特征及其对甲烷爆炸极限的影响

Fire Pub Date : 2024-05-14 DOI:10.3390/fire7050168
Dong Ma, Leilin Zhang, Tingfeng Zhu, Zhenfang Shi
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引用次数: 0

摘要

在矿井火区关闭过程中,煤炭燃烧产生的一氧化碳、乙烯等可燃气体的浓度发生动态变化,甲烷爆炸的危险性也随之改变,经常发生甲烷爆炸。因此,研究矿井封闭过程中的瓦斯浓度分布和甲烷爆炸极限对灾害防治具有重要意义。本文建立了煤层气三维物理模型,研究了火区封闭过程中一氧化碳和乙烯的分布。此外,还分析了富含 CO 和 C2H4 的甲烷在高炉封闭火区的爆炸极限。结果表明,火区封闭后,CO 和 C2H4 会在火区附近形成小范围积聚现象,当火区封闭超过 15 min 后,环境中的混合可燃气体会失去爆炸性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Characteristics of Carbon Monoxide and Ethylene Generation in Mine’s Closed Fire Zone and Their Influence on Methane Explosion Limits
Methane explosions often occur during the closure process of mine fire zones, during which the concentration of combustible gases such as monoxide and ethylene produced by coal combustion dynamically changes, which changes the risk of methane explosion. Therefore, studying the gas concentration distribution and methane explosion limits during the process of mine closure is of great significance for disaster prevention and control. In this paper, a three-dimensional physical model of gob was built, and the distribution of monoxide and ethylene in the process of fire zone closure was investigated. Further, the explosion limits of methane enriched with CO and C2H4 in the closed fire zone of gob were analyzed. The results indicate that CO and C2H4 would form a small-scale accumulation phenomenon near the fire zone after the closure of the fire zone, and when the fire zone is closed for more than 15 min, the mixed combustible gases in the environment lose their explosiveness.
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