煤矿安全2025，Vol.56Issue(1)：93-99,7.DOI:10.13347/j.cnki.mkaq.20231845
通风风速对分岔巷道内火灾烟气分布的影响数值研究
Numerical research on the influence of ventilation velocity on fire smoke distribution in bifurcated roadway
摘要
Abstract
In order to investigate the influence of ventilation velocity on fire smoke distribution in bifurcated roadway,the computa-tional fluid dynamics(CFD)numerical method was adopted to simulate the fires located in upstream of main-roadway.The influ-ence of ventilation velocity on the length of smoke backflow and the temperature distribution and CO mass concentration distribu-tion in main-roadway and sub-roadway were analyzed.The results showed that the length of smoke backflow decreased linearly as the increasing of ventilation velocity.The average temperature at the height of breathing zone in sub-roadway was little higher than that in main-roadway downstream under different ventilation velocity condition,and the biggest temperature difference is 8℃.The relationship between ventilation velocity and the average temperature at the height of breathing zone in main-roadway downstream and in sub-roadway fitted in power function trend.The CO mass concentration difference between main-roadway downstream and sub-roadway decreased gradually as the increasing of ventilation velocity,and the smallest mass concentration difference was 9.25 mg/m3.The relationship between ventilation velocity and the CO average mass concentration at the height of breathing zone in main-roadway downstream and in sub-roadway fitted in power function trend.When the ventilation velocity is 1-3 m/s,the workers in the sub-roadway are less susceptible to fire smoke and toxic gases,and when the ventilation velocity is 1.5-3 m/s,the workers in the main-roadway downstream are less susceptible to fire smoke and toxic gases关键词
矿井火灾/分岔巷道/通风风速/烟气分布/数值模拟Key words
mine fire/bifurcated roadway/ventilation velocity/smoke distribution/numerical simulation分类
矿业与冶金引用本文复制引用
丁翠..通风风速对分岔巷道内火灾烟气分布的影响数值研究[J].煤矿安全,2025,56(1):93-99,7.基金项目
中国劳动关系学院校级一般资助项目(24XYJS009) （24XYJS009）
河南省瓦斯地质与瓦斯治理重点实验室—省部共建国家重点实验室培育基地开放基金资助项目(WS2022B11) （WS2022B11）
