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Study of the Microstructure Characteristics of Three Different Fine-grained Tailings Sand Samples during Penetration

机译：三种不同粒度的尾矿砂样品渗透过程中的微观结构特征研究

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摘要

This paper explores the microstructural evolution characteristics of tailings sand samples of different types of infiltration failure during the infiltration failure process. The homemade small infiltration deformation instrument is used to test the infiltration failure characteristics of the tailings sand during the infiltration failure process. Evolutionary characteristics of the internal microstructure pores and particle distribution were also studied. Using CT (computerized tomography) technology to establish digital image information, the distribution of the microscopic characteristics of the particle distribution and pore structure after tailing sand infiltration were studied. Microscopic analysis was also performed to analyze the microscopic process of infiltration and destruction, as well as to see the microscopic structural characteristics of the infiltration and destruction of the total tailings. The test results show that there are obvious differences in the microstructure characterization of fluid soil and piping-type infiltration failures. Microstructure parameters have a certain functional relationship with macrofactors. Combining the relationship between macrophysical and mechanical parameters and microstructural parameters, new ideas for future research and the prevention of tailings sand infiltration and failure mechanisms is provided.
机译：本文探讨了不同类型渗透破坏的尾矿砂样品在渗透破坏过程中的微观结构演化特征。自制的小型入渗变形仪用于测试尾矿砂在入渗破坏过程中的入渗破坏特征。还研究了内部微结构孔的演化特征和颗粒分布。利用计算机断层扫描（CT）技术建立数字图像信息，研究了尾矿砂入渗后颗粒分布的微观特征分布和孔结构。还进行了微观分析，以分析渗透和破坏的微观过程，并观察总尾矿的渗透和破坏的微观结构特征。试验结果表明，流体土的微观结构特征和管道型渗透破坏存在明显差异。微观结构参数与宏观因素具有一定的功能关系。结合宏观物理和力学参数与微观结构参数之间的关系，为今后的研究以及防止尾矿砂入渗和破坏机理提供了新思路。

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