Spontaneous Combustion Of Coal Pillar Roadway Numerical Simulation Of Temperature Distribution

Spontaneous combustion in coal seam roadway is a common way of mine, one of the natural fires, with certain degree of secrecy, prevention and detection of tunnel fire source point position is mine, one of the main elements of safety in production.In this paper, through the wall of the roadway within the category of spontaneous combustion of coal produced by the temperature field distribution of the study, on the temperature field distribution of the wall for the roadway location of the point source of fire detection to provide guidance.Tunnel wall appears pores, airflow through the pores to reach a certain time to meet several conditions for spontaneous combustion of coal may cause spontaneous combustion of coal. Paper a numerical heat and mass transfer, heat conduction and thermal convection in porous media, such as the theory of fluid dynamics tools, applications software, FLUENT simulation of five kinds of fire source point location and the surrounding region, the temperature field, velocity field, and to use the software broadly origin draw roadway boundary temperature - displacement curve,Tunnel fire points from the last point of the boundary and the fire between the radial temperature - from the distribution map. In which a fire source point position to change the case of a separate wind speed, porosity, observe and compare the temperature changes.Wind speed increases, the boundary heat tunnel quickly, lower the temperature. But the impact is not obvious. Porosity influence on the temperature field, porosity increases, intake air volume increases, the boundary heat tunnel quickly, lower the temperature.The results for the accurate information on roadway characteristics of wall temperature distribution, and direct temperature-detection technology to detect tunnel fire source point location has a certain significance.