Study on fire-induced smoke temperature distribution characteristics in largely inclined roadway

doi:10.16265/j.cnki.issn1003-3033.2021.04.021

Abstract

Abstract: In order to study fire smoke distribution features in inclined mine roadway with longitudinal ventilation, maximum temperature and longitudinal attenuation characteristics beneath ceiling in a roadway with slope ranging from 5° to 30° were analyzed through Pyrosim numerical simulation method. Then, slope correction coefficients were put forward, and a new prediction model of maximum smoke temperature beneath ceiling with slope greater than 10° was established. The results show that with increase of roadway slope, maximum smoke temperature decreases, but temperature rising gradient in vertical direction decreases, and roadway near fire source is filled with hot smoke. Temperature attenuation characteristics along downwind ceiling of fire source can be correlated well by sum of two exponential functions. Longitudinal smoke temperature distribution downstream fire source with large roadway slopes can be divided into two regions. When dimensionless longitudinal distance x/H is smaller than 5, smoke temperature decreases along with increase of distance as slope increases. In case of x/H greater than 5, the greater roadway slope is, the higher smoke temperature is when slope is larger than 10°, however as it is within 10°, the greater it is, the lower temperature will be.

Key words: large slope, inclined roadway, fire smoke, maximum temperature of ceiling smoke, prediction model

CLC Number:

X936
X932

LIU Yuqing, ZHANG Peihong. Study on fire-induced smoke temperature distribution characteristics in largely inclined roadway[J]. China Safety Science Journal, 2021, 31(4): 156-162.

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