Numerical Simulation on Oxygen Consumption and Temperature Rising of Broken Coal Spontaneous Combustion in Gateway Retained Along Goaf
Abstract：In order to study the spontaneous combustion oxygen consumption and temperature rising law due to the air leakage when the top coal and coal pillar broken in the gateway,based on the quantity,momentum and heat conservation model,the FLUENT software was applied to obtain the stable oxygen distribution and temperature dynamic variation process of the broken coal mass around the gateway along the goaf.The calculation result showed that when the coal pillar was in completed condition,the oxygen content distribution in the top coal would be higher than the coal pillar and both the top coal and coal pillar would have the danger of the spontaneous combustion.Due to the heat radiation function,the air leakage boundary of the top coal and coal pillar to the high temperature zone both would have a certain distance.The temperature rising rate of the top coal would be faster than the coal pillar.When the air leakage strength changed,the high temperature zone location and scope would be changed.The study conclusion could assist to reduce the seeking scope of the site fire zone and could be favorable to timely make the spontaneous combustion control measures.
Keywords：top coalcoal pillaroxygen distributionhigh temperature zonespontaneous combustion
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)