摘要
采用自主研发的火区启封及复燃模拟实验系统,对煤在不同温度、湿度、通风强度等条件下火区的复燃特性及气体产物的生成规律进行研究。研究表明:火区的复燃是一种火灾动力学现象。火区气体温度降到80～90℃时,即使煤体温度高达250～260℃,CO、CH4、C2H6和C2H4依然存在且浓度都较高时,启封并供氧仍不发生复燃。模拟实验条件下,可以通过测量火区气温,观察H2、CO及烃类气体浓度变化趋势是否增加来判断火区是否熄灭。这为煤矿自燃火区封闭后启封提供了参考依据。
The recrudescence characteristics and the law of gas generation of the fire zone were studied at different temperatures,humidities and ventilated intensities by the mine close fire-zone recrudescence and open simulation system.The results show that the recrudescence of the fire zone is a phenomenon of fire dynamics.Open the fire-zone and supply oxygen,recrudescence does not occur when gas temperature dropped to 80～90℃,even if the coal temperature is 250～260℃,the concentrations of CO,CH4,C2H6 and C2H4 are still high.By measuring the temperature of the fire zone and observing the concentrations of H2,CO and hydrocarbon gases trend,whether the fire zone is extinguished can be judged in the simulation experiment conditions.The study can provide reference to opening spontaneous combustion area.
出处
《煤矿安全》
CAS
北大核心
2010年第9期4-7,共4页
Safety in Coal Mines
关键词
封闭火区
火区启封
复燃
温度
气体成分
close fire-zone
fire-zone open
recrudescence
temperature
gas composition
