细粒尾矿砂渗透破坏细观结构特征研究

时悦琪; 李长洪; 龙大愚

doi:10.7652/xjtuxb202004019

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细粒尾矿砂渗透破坏细观结构特征研究

更新时间：2025-07-09

- 细粒尾矿砂渗透破坏细观结构特征研究
- Meso-Structure Features of Fine Tailings Sand in Osmotic Destruction
- 西安交通大学学报 2020年54卷第4期页码：155-164
- 作者机构：
  
  北京科技大学金属矿山高效开采与安全教育部重点实验室,北京,100083
- 作者简介：
- 基金信息：
  
  : 2019-11-22。作者简介: 时悦琪(1989-),男,博士生;李长洪(通信作者),男,教授,博士生导师。基金项目: 国家重点研发计划项目资助(2017YFC0804609)
- DOI：10.7652/xjtuxb202004019
  中图分类号： TU411.92
- 网络首发：2020-04-10，
  
  纸质出版：2020
- 稿件说明：
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时悦琪, 李长洪, 龙大愚. 细粒尾矿砂渗透破坏细观结构特征研究[J]. 西安交通大学学报, 2020,54(4):155-164.

Meso-Structure Features of Fine Tailings Sand in Osmotic Destruction[J]. 2020, 54(4): 155-164.
时悦琪, 李长洪, 龙大愚. 细粒尾矿砂渗透破坏细观结构特征研究[J]. 西安交通大学学报, 2020,54(4):155-164. DOI： 10.7652/xjtuxb202004019.

Meso-Structure Features of Fine Tailings Sand in Osmotic Destruction[J]. 2020, 54(4): 155-164. DOI： 10.7652/xjtuxb202004019.

摘要

采用自制的小型渗透变形仪

对细粒质量分数为30%的尾矿砂进行渗透破坏特性试验

研究细粒尾矿砂在渗透破坏进程中内部的细观结构孔隙和颗粒分布的演化特征。在渗透破坏进程中

采用水头级差的方法

对试样逐级加载4级水头直至试样发生破坏

结合CT技术

对4种水头下的尾矿砂试样进行扫描

运用vg studio max 3.0和avizo9.0.1三维可视化软件对扫描后的试样数据进行三维重构

建立数字图像信息

从微观上研究尾矿砂渗透破坏后颗粒的分布及孔隙结构的细观特征变化

分析其渗透破坏微观进程

总结尾矿砂渗透破坏细观结构特征。试验结果表明:随着水头加载值增大

细粒尾矿试样表面会有细小颗粒被带出

且出水口出水浑浊

发生管涌破坏; 细粒尾矿内部的细观结构试样总孔隙率逐渐增大

连通孔隙不断发育

0.075 mm以下粒径颗粒会不断地向渗流方向迁移

在试样内部形成连通的渗透破坏通道。

Abstract

The osmotic destruction characteristics of tailings sand with a fine particle content of 30% are tested on a self-made small-scale permeation deformer. The evolution features of meso-structure pores and particle distribution in the process of osmotic destruction of the fine-grained tailings are discussed. In the process of osmotic destruction

the sample is loaded with 4 stages of water heads step by step by the method of water head difference until the sample is destroyed. Adopting CT(computeri-ed tomography)technology

the tailing sand samples under four head pressures are scanned

the vg studio max 3.0 and 3D avi-o 9.0.1 visuali-ation softwares are used to reconstruct the scanned sample data in three dimensions

and the distribution of particles and the mesoscopic changes of pore structure are investigated microscopically with the newly established digital image information after tailings sand osmotic failure. The microscopic process of osmotic destruction and the meso-structural fe

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references

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