煤矿安全2025，Vol.56Issue(1)：100-106,7.DOI:10.13347/j.cnki.mkaq.20240006
矿井巷道动态密闭过程火灾烟气特性变化规律研究
Research on change law of fire smoke characteristics during dynamic sealing process of mine tunnels
摘要
Abstract
In order to study the change law of smoke characteristics in the dynamic sealing process of coal mine roadway fire,FDS software was used to conduct full-scale numerical simulation of mine roadway fire,and the CO volume fraction decay rate model of roadway fire was established by scale experiment.The transverse and longitudinal temperature distribution and smoke spread law in the sealing process of 50%to 100%of the roadway were established,and the CO volume fraction attenuation model was established to predict the fire extinguishing time after the roadway was completely sealed.The results show that during the change of sealing ra-tio from 50%to 100%,the temperature at the center of the ceiling first sharply decreases and then slowly increases;after being sealed,the temperature above the fire source shows a distribution pattern of high temperature above and low temperature below,and the closer it is to the fire source,the faster the temperature decay rate;the vertical distribution of ceiling temperature shows an over-all increase,the maximum temperature point shifts 1-3 m to the sealed side;the deposition phenomenon of smoke on the sealed side is obvious,and the stratification phenomenon disappears;the relationship between CO volume fraction and time is linear when one side is completely sealed.According to the CO volume fraction decay rate model,it is predicted that the ignition source of 2,3 and 4 MW is extinguished after 103.16,94.40 and 86.21 s,respectively.关键词
巷道火灾/动态密闭过程/温度分布/快速密闭/烟气Key words
roadway fire/dynamic sealing process/temperature distribution/rapid sealing/flue gas分类
矿业与冶金引用本文复制引用
何铖茂,王洋,张庆锋..矿井巷道动态密闭过程火灾烟气特性变化规律研究[J].煤矿安全,2025,56(1):100-106,7.基金项目
国家自然科学基金资助项目(52274150) （52274150）
