摘要
为探索细水雾对矿井胶带火灾蔓延的抑制效能,利用FDS软件构建矿井胶带火灾模型。研究风速、细水雾粒径、喷头与火源距离等因素对细水雾抑制胶带火灾效果的影响机制,探究不同工况下巷道温度场分布规律与烟气流动规律。结果表明,细水雾可以有效抑制胶带火灾蔓延,一定范围内,火场温度和烟气浓度均随风速增大而减小,风速由1 m/s增加到2.5 m/s,温度下降率增加18.42%;火场温度和烟气浓度随喷雾粒径、喷头与火源距离减小而减小;雾滴粒径由200μm增加到400μm,冷却与阻烟效率降低35.20%、22.85%;喷头距离火源超过14.5 m,细水雾抑制效果明显减弱。通过增大风速、减小水雾粒径、缩小喷头和火源距离,可以提高细水雾降温阻烟效果,为开发巷道火灾细水雾应急处置技术与装备提供理论依据。
In order to explore the suppression effect of water mist on the spread of mine belt fire,a mine belt fire model was constructed using FDS software to study the influential mechanism of wind speed,particle size of water mist,and distance between nozzle and fire source on the effect of water mist on belt fire suppression,and explore the distribution law of roadway temperature field and smoke flow law under different working conditions.The results show that water mist can effectively inhibit the spread of belt fire.Within a certain range,the temperature and smoke concentration of the fire site decrease with the increase of wind speed.The wind speed increases from 1 m/s to 2.5 m/s,and the temperature drop rate increases by 18.42%;The temperature and smoke concentration in the fire site decrease with the decrease of spray particle size and the distance between the nozzle and the fire source;droplet size is increased from 200μm to 400μm.The cooling and smoke suppression efficiency decreased by 35.20%and 22.85%,respectively;The nozzle is more than 14.5 m away from the fire source,and the suppression effect of water mist is significantly weakened.By increasing the wind speed,reducing the water mist particle size,and reducing the distance between the nozzle and the fire source,the effect of water mist cooling and smoke suppression can be improved,which provides a theoretical basis for the development of roadway fire water mist emergency treatment technology and equipment.
作者
徐传田
郑泽坤
XU Chuantian;ZHENG Zekun(Guobei Coal Mine,Huaibei Mining Co.,Ltd.,Bozhou 233600,China;College of Safety Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China)
出处
《陕西煤炭》
2024年第1期19-24,共6页
Shaanxi Coal
关键词
细水雾
胶带火灾
火灾蔓延
影响机制
温度场分布
烟气流动
water mist
belt fire
fire spread
influential mechanism
temperature field distribution
flue gas flow
