(1. 北京科技大學(xué) 土木與資源工程學(xué)院 金屬礦山高效開采與安全教育部重點(diǎn)實(shí)驗(yàn)室，北京 100083；
2. 北京金誠信礦山技術(shù)研究院有限公司，北京 101500)
摘 要: 柱浸過程中礦巖散體的不均勻分布影響著溶液的滲流規(guī)律。為考察細(xì)粒層的存在下溶液流動特性，利用CT技術(shù)與COMSOL Multiphysics多相耦合模擬軟件，開展礦巖散體內(nèi)溶液滲流模擬研究，獲得細(xì)粒層存在條件下的流體流動軌跡、滲流速度場及壓力場分布規(guī)律。結(jié)果表明：細(xì)粒層影響著溶液的流動軌跡和優(yōu)先流的形成，具體表現(xiàn)為大部分溶液繞過細(xì)粒層形成優(yōu)先流，細(xì)小支流橫穿細(xì)粒層，在細(xì)粒層內(nèi)部溶液難以到達(dá)的位置，溶液流速較低，形成溶液流動的停滯區(qū)。細(xì)粒層內(nèi)溶液速度降與壓力降較小，在相鄰細(xì)粒層的孔喉位置處，溶液流速及該處壓力明顯增高。
關(guān)鍵字: 滲流；偏析；優(yōu)先流；數(shù)值模擬；流動行為；CT技術(shù)
（1. 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;
2. Beijing JCHX Mine Technology Research Institute Co., LTD, Beijing 101500, China）
Abstract: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 interlayers. 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.
Key words: seepage; segregation; preferential flow; numerical simulation; flow behavior; computed tomography technology
