Numerical Simulation of Self-heating and Its Influence Factors of Sulfide Ore Heap
In order to determine the rapid self-heating time,self-heating layer range and starting time of spontaneous combustion of sulfide ore heap in the stope,the mathematical model for self-heating temperature field of the ore heap was established based on heat transfer theory,and some related simulation parameters were measured by utilizing the ore samples from a pyrite mine.On this basis,the self-heating temperature field and its related influence factors were studied.The results indicate that the heating effect of the ore heap is very significant in the fast reaction stage and the high-temperature region is located in the central area.At about 318 h rapid self-heating occurs and the area,thickness and vertical depth of the corresponding self-heating layer are 0.65 m2,0.47 m and 1.28 m respectively.The starting time of spontaneous combustion is 430 h.Risk level of spontaneous combustion is positively correlated with the size and height of the ore heap.Airflow velocity has great influence on temperature variation of the surface layer,but has little influence on temperature variation of the deep region.In order to prevent spontaneous combustion of the ore heap,some relevant measures should be taken during the mining process,such as temperature monitoring,ore-caving amount control,ore heap spreading and timely ore drawing.
sulfide ore heap rapid self-heating self-heating layer starting time of spontaneous combustion numerical simulation
Pan Wei Liao Jun Wu Chao Li Zijun
Key Laboratory of Mine Thermo-motive Disaster and Prevention, Ministry of Education,Fuxin, 123000, C College of Mining Engineering, Liaoning Technical University, Fuxin, 123000, China School of Resources and Safety Engineering, Central South University, Changsha, 410083, China
国际会议
International Symposium on Rock Mechanics and Mine Dynamic Disaster Prevention(岩石力学与矿井动力灾害防治国际学术研讨会)
辽宁阜新
英文
221-227
2013-07-13（万方平台首次上网日期，不代表论文的发表时间）