Study on Smoke Temperature Distribution Characteristics of Coal Mine Inclined Roadway Fire

Abstract

ABSTRACT Mine roadway fire is a major natural disaster that threatens the safety of mine production for a long time. 65% of the total casualties of coal mines are caused by mine roadway fire. In order to study the smoke temperature distribution characteristics of inclined roadway fire in coal mine and reduce personnel injury and equipment loss. In this paper, the calculation formula of the maximum air flow temperature and the expression of the maximum temperature on the downwind side of the fire area are presented. Based on the actual roadway of Wusu Coal mine in Hohhot, Inner Mongolia, a “Mine inclined roadway fire simulation experimental system” with similarity ratio of 1:20 is established. The fire smoke temperature under different roadway inclination (5°, 10°, 15°) and different inlet wind speed (0.5 m/s, 1.0 m/s, 1.5 m/s) was tested and analyzed, and the temperature field of inclined roadway during fire was simulated and analyzed by Ansys numerical simulation software. The research shows that when the inlet wind speed is larger or the roadway inclination is larger, the heat diffusion is faster, the temperature field is longer and narrower, and the temperature is lower, but the temperature variation trend of the overall combustion process remains unchanged. By studying the temperature distribution of smoke in inclined roadway fire, it is convenient to take corresponding measures in time to minimize the impact of fire.