摘要
柱浸过程中矿岩散体的不均匀分布影响着溶液的渗流规律。为考察细粒层的存在下溶液流动特性,利用CT技术与COMSOL Multiphysics多相耦合模拟软件,开展矿岩散体内溶液渗流模拟研究,获得细粒层存在条件下的流体流动轨迹、渗流速度场及压力场分布规律。结果表明:细粒层影响着溶液的流动轨迹和优先流的形成,具体表现为大部分溶液绕过细粒层形成优先流,细小支流横穿细粒层,在细粒层内部溶液难以到达的位置,溶液流速较低,形成溶液流动的停滞区。细粒层内溶液速度降与压力降较小,在相邻细粒层的孔喉位置处,溶液流速及该处压力明显增高。
The uneven distribution of ore granular media affects the solution seepage law in heap dumping process. To investigate the solution seepage law with fine interlayers existed, the seepage simulation of column with fines interlayers existed was carried out by using the computed tomography （CT） technology and COMSOL Multiphysics modeling software. The fluid flow trajectory, distribution law of seepage velocity and pressure field with fine interlayers existed were ascertained. The results show that fine interlayers influence flow trajectory and formation of preferential flow. In detail, the preferential flow is emerged after the most solution bypassed the fine interlayers, and the plenty of small tributaries flow across fine iuterlayers. Stagnant regions of fluid flow are emerged where the solution is hard to reach in the internal of fine interlayers. The drops of speed and pressure are small in the fine interlayers, and the speed and pressure increase significantly when the fluid passes through the pore throats connecting the adjacent fine interlayers.
作者
尹升华
王雷鸣
潘晨阳
陈勋
谢芳芳
YIN Sheng-hua WANG Lei-ming PAN Chen-yang CHEN Xun XIE Fang-fang(Key Laboratory of Ministry of Education for High-Efficient Mining and Safety of Metal, School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China Beijing JCHX Mine Technology Research Institute Co., LTD, Beijing 101500, China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2017年第3期574-581,共8页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(51374035)
新世纪优秀人才支持计划资助(NCET-13-0669)
全国优秀博士学位论文作者专项基金资助项目(201351)~~
关键词
渗流
偏析
优先流
数值模拟
流动行为
CT技术
seepage
segregation
preferential flow
numerical simulation
flow behavior
computed tomographytechnology
