深井“T”型巷道内火灾烟气流动特性的研究

Study on the Fire Smoke Flow Characteristics in T-type Roadway of Deep Well

为了研究深井"T"型巷道内发生火灾时的烟气流动规律,采用火灾动力学软件FDS对高湿环境下不同环境温度、不同火源功率以及不同风速的火灾进行数值模拟,重点研究了"T"型巷道Ⅱ内的温度、有毒有害气体以及能见度的变化情况。研究结果表明:随着环境温度的升高,火灾发生后巷道内温度越来越高,CO和CO2浓度也在增大;火源功率越大,产生的烟气、有毒有害气体越多,造成巷道内温度、CO和CO2浓度升高,能见度降低;火灾发生后,当人员处于巷道Ⅱ下风向处时,不宜通过过度增大风速来进行救援,因为过度增大风速会导致更多烟气进入下风向的巷道中,对人员造成更大的危害。

In order to study the fire smoke flow law in a T-type roadway of deep well,the fire dynamics software FDS was used to numerically simulate fires with different ambient temperatures,fire source powers and wind speeds in a high humidity environment.Changes in temperature,toxic and harmful gases and visibility in T-type roadway II were studied.The research results show that with the increase of the ambient temperature,the temperature in the roadway becomes higher and higher after fire,and the concentration of CO and CO2 is also increasing.The higher the fire source power is,the more smoke and toxic and harmful gases are produced,resulting in the increase of temperature and concentration of CO and CO2 and the decrease of visibility.After fire,when the personnel are in the downwind direction of roadway II,it is not appropriate to increase the wind speed excessively to rescue,because the excessive increase of wind speed will lead to more smoke entering the downwind roadway,causing greater harm to personnel.