细粒尾矿充填模袋固结规律的数值模拟  

Numerical simulation of consolidation law of fine-grained tailings filling geotextile tubes

作　　者：刘小文[1] 吴泽铭 何海松 王建[1] LIU Xiaowen;WU Zeming;HE Haisong;WANG Jian(School of Infrastructure Engineering,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学工程建设学院,江西南昌330031

出　　处：《南昌大学学报(工科版)》2025年第1期56-62,共7页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(52169026,52369024)。

摘　　要：用细粒尾矿充填模袋,其脱水、固结时间较长,脱水固结规律直接影响其筑坝的沉降变形以及稳定性。采用ABAQUS软件模拟在不同充灌浓度和充灌高度条件下,模袋体在固结过程中位移、孔隙水压力分布以及模袋张力的变化规律,并将模拟结果与试验进行对比,结果较吻合。同时通过建立大尺寸模袋体模型研究在实际工程中大模袋固结排水速率受尺寸变化的影响。结果表明:模袋体的整体变形和孔隙水压力均随模袋高度的增加而逐渐增大;而模袋的整体变形和孔隙水压力随充灌浓度的增大逐渐减小;对于工程中的大尺寸模袋,沉降量与孔隙水压力消散时间均随模袋高度的增加而增大,不同模袋高度下最终沉降率均在24%左右。Fine-grained tailings filling geotextile tubes dehydration,consolidation time is long and its dehydration and consolidation law directly affects the settlement deformation and stability of the mold bag method of dam construction.ABAQUS software was used to simulate the variation of displacement,pore water pressure distribution and bag tension during the consolidation process of the filling geotextile tubes under different filling concentrations and filling heights.The simulation results were compared with the test,and the results were in good agreement.At the same time,the numerical model of large-scale geotextile tubes was established to study the influence of size change on the consolidation and drainage rate of large geotextile tubes in practical engineering.The results showed that the overall deformation of the geotextile tubes and pore water pressure gradually increased with the increase of the height of the geotextile tubes;while the overall deformation of the geotextile tubes and pore water pressure gradually decreased with the increase of the filling concentration.For the large size of the mold bag in the project,the amount of settlement and the pore water pressure dissipation time increased with the increase of the geotextile tube heights,and the final settlement rate was about 24%at different geotextile tube heights.

关 键 词：细粒尾矿 模袋法 有限元分析 影响因素 大尺寸模型 

分 类 号：TD926.4[矿业工程—选矿]