Numerical Study on the Three Zones Distribution of Spontaneous Combustion due to the Residual Coal Oxidation in Goaf
The air leakage in goaf is one of the important reasons that lead to the spontaneous combustion of residual coal and the process of spontaneous combustion results from the coupling effect of the seepage field, gas species diffusion and temperature field and so on. In this paper, combining the practical example, the finite element method is applied to simulate the spontaneous combustion process of residual coal in goaf. The spontaneous combustion period of residual coal is 48 days through the numerical simulation based on the distribution range of the critical oxygen concentration (5％) and upper velocity of seepage flow (0.016 m/s), the three zones in goaf are divided for the spontaneous combustion of residual coal. Simultaneously, the changes of oxygen (O2) and carbon monoxide (CO) concentration are computed and analyzed, and the minimal safe mining speed of working face calculated is 2.71 m/d to prevent from the spontaneous combustion of residual coal in goaf.
spontaneous combustion of residual coal three zones in goaf finite element method numerical study
LIN Lifeng JIA Baoshan LI Yanhong WANG Yinghua
College of Safety Science & Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, 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
1448-1455
2010-10-26（万方平台首次上网日期，不代表论文的发表时间）