散装铁精矿流态化特性的模型试验研究  

MODEL EXPERIMENTAL STUDY OF FLUIDIZATION OF IRON CONCENTRATE ORE IN BULK

作　　者：周健[1,2] 简琦薇[1] 吴晓红[3] 李宁[3] 朱耀民[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092 [3]上海出入境检验检疫局,上海200135

出　　处：《岩石力学与工程学报》2013年第12期2536-2543,共8页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家公益性基金项目(201310065)

摘　　要：通过室内小型振动台模型试验,对船载散装铁精矿在动力荷载下的流态化特性进行研究。基于数字图像采集和分析,揭示散装铁精矿流态化的演化过程;同时分析含水率、加速度、密实度等因素对铁精矿流态化特性的影响。试验结果表明:含水率是影响铁精矿流态化发生的关键因素且存在含水率临界值;而加速度对含水率低于8%的铁精矿基本无影响;密实度的增加能够减缓铁精矿流态化演化历程,但不能阻止流态化的发生。同时还提出铁精矿安全含水率的建议和流态化预防措施。研究成果对更好地了解铁精矿安全含水率的范围和减少散装铁精矿在载运过程中的流态化风险有重要的意义。By the experiments of shaking table, investigations of the fluidization of iron concentrate ore in bulk under dynamic loading have been launched. With the use of digital image capture and processing technology, the law of fluidization evolution is revealed; and the effects of different influencing factors are analyzed, such as moisture content, acceleration, dense degree. The results show that the fluidization of iron concentrate ore is mostly influenced by moisture content, which exists a critical value; and it hardly affected by acceleration when moisture content below 8%. At the same time, it can be postponed but cannot be blocked by the increase of dense degree. The article also gives some suggestion about safety margin of iron concentrate ore＇s moisture content and the measures on preventing the fluidization. The research has played a significant role in better understanding the fluidization of iron concentrate ore.

关 键 词：采矿工程 铁精矿 流态化 临界含水率 预防措施 

分 类 号：TD32[矿业工程—矿井建设]