Numerical Simulation of Influence of Coal Spontaneous Combustion on Flow Field in Roof Falling Zone in Coal Mine
Coal spontaneous combustion in roof falling zone could not cause accumulated-methane explosion, while could cause gas explosion in some cases. Practical experiences show this is related to the depth of roof falling zone. This paper adopts FLUENT to simulate numerically. It can be seen that coal spontaneous combustion generates fire pressure forming a vortex flow in roof falling zone. The accumulated-methane can be diluted effectively by vortex flow and concentration is below the lower explosion limit when the cave depth is relatively low. And accumulatedmethane concentration can still in explosion limits when the cave depth is relatively high. The numerical simulation results reasonably explain why the possibility of methane explosion induced by coal spontaneous combustion is small. And the results also explain explosion could still occur for spontaneous combustion.
coal spontaneous combustion roof falling zone flow field numerical simulation
ZHU Yingchun ZHANG Huiqiang
School of Aerospace, Tsinghua University, Beijing 100084, China
国际会议
The 2010 International Symposium on Safety Science and Technology(2010 安全科学与技术国际会议)
杭州
英文
1415-1421
2010-10-26（万方平台首次上网日期，不代表论文的发表时间）