Abstract Induced by tunnel excavation, the particles constantly shift in broken porous rock of faults until failure occurs, which provides channels for water inrush. Therefore, it is essential to investigate the particle migration of broken porous rock. Thus, a visual experimental system of particle migration was developed independently. Further study on the mass loss evolution of broken porous rock induced by seepage failure was performed using physical model tests, and the effect of the grain gradation of broken porous rock was also analyzed. According to the composition and lost characteristics of the samples, the samples were divided into dense-suspension structure and void-skeleton structure. The results indicated that the mass loss of the particles decreased with the increase in the gradation coefficient when the sample had a dense-suspension structure, while there was no significant change in the lost quality with the increase of gradation coefficient when the sample had a void-skeleton structure. Moreover, the time required for water inrush decreased with the increase in the gradation coefficient, which is because the higher the content of the fine particles is, the lower the permeability of the sample. Sample settlement is positively correlated with the lost quality of particles.

中文翻译：

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破碎多孔岩变质量渗流规律的实验研究

摘要 在隧道开挖诱导下，颗粒在断层的破碎多孔岩中不断移动直至破坏，为突水提供了通道。因此，对破碎多孔岩石的颗粒运移进行研究非常有必要。因此，独立开发了粒子迁移的视觉实验系统。利用物理模型试验进一步研究了渗流破坏引起的破碎多孔岩质量损失演化，并分析了破碎多孔岩颗粒级配的影响。根据样品的组成和损失特性，将样品分为致密悬浮结构和空隙骨架结构。结果表明，当样品具有致密悬浮结构时，颗粒的质量损失随着级配系数的增加而减少，而当样品具有空隙时，随着级配系数的增加，颗粒的质量损失没有显着变化。 -骨架结构。此外，随着级配系数的增加，突水所需的时间减少，这是因为细颗粒含量越高，样品的渗透性越低。样品沉降与颗粒质量损失呈正相关。随着级配系数的增加，突水所需的时间减少，这是因为细颗粒含量越高，样品的渗透性越低。样品沉降与颗粒质量损失呈正相关。随着级配系数的增加，突水所需的时间减少，这是因为细颗粒含量越高，样品的渗透性越低。样品沉降与颗粒质量损失呈正相关。