The interface process and its dynamic model 
of red-bed soft rock softening

ZHOU Cui-ying; HUANG Si-yu; LIU Zhen; LU Yi-qi

doi:10.16285/j.rsm.2018.0909

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The interface process and its dynamic model of red-bed soft rock softening

更新时间：2026-06-25

- The interface process and its dynamic model of red-bed soft rock softening
- Vol. 40, Issue 8, Pages: 3189-3196(2019)
- 作者机构：
  
  1. 中山大学土木工程学院,广东,广州,510275
  2. 中山大学工学院,广东,广州,510275
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2018.0909
  CLC： TU45
- Online First：25 August 2019，
  
  Published：2019
- 稿件说明：
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ZHOU Cui-ying, HUANG Si-yu, LIU Zhen, et al. The interface process and its dynamic model of red-bed soft rock softening[J]. 2019, 40(8): 3189-3196.
DOI：

ZHOU Cui-ying, HUANG Si-yu, LIU Zhen, et al. The interface process and its dynamic model of red-bed soft rock softening[J]. 2019, 40(8): 3189-3196. DOI： 10.16285/j.rsm.2018.0909.

摘要

红层软岩灾变和界面上的水-岩相互作用密切相关，研究界面过程对于揭示其灾变机制具有重要的意义。目前针对红层软岩软化的研究主要是宏观唯象特征的研究，红层软岩软化界面过程的研究处于探索和起步阶段，仍需要进一步地完善。针对这一问题，通过分析红层软岩软化界面过程的特征，水-岩界面上的软岩颗粒不断溶解，水在软岩中扩散，形成新的水-岩界面，基于此建立软岩系统标准熵对软岩软化进行表征，发现软岩系统标准熵值随着时间的变化规律与软岩软化崩解具有一致性；同时，利用菲克扩散定律构建软岩软化界面过程的动力学模型，很好地描述水-岩界面的生成规律；最后在红层软岩的DEM-CFD（离散元-计算流体力学耦合）模型中，软岩软化过程颗粒连接断裂代表水-岩界面的生成，对比界面过程动力学模型，取得较好的拟合结果。该研究结果对软岩软化界面过程的探索具有一定的意义。

Abstract

Since the catastrophe of the red-bed soft rock is closely related to the water-rock interaction on the surface

the research on the interface process is of great significance to reveal its catastrophic mechanism. However

at present

the study on the red-bed soft rock softening mainly focuses on the macroscopic phenomenological characteristics

and the study on its interface process is still in the exploration and initial stage

which needs further improvement. The characteristics of the interface process of the red-bed soft rock softening are analyzed

which shows the soft rock particles on the water-rock interface are continuously dissolved

and the water diffuses in the soft rock to form a new water-rock interface. Based on this result

the standard entropy of soft rock is established to characterize the soft rock softening

and the evolution of the standard entropy is consistent with that of the softening and disintegration of soft rock over time. At the same time

the dynamics model of soft rock softening interface is constructed by using the Fick diffusion law

which can describe the formation rule of the water-rock interface well. Finally

in the DEM-CFD model of red-bed soft rock

the particle connection fracture in soft rock softening process represents the generation of water-rock interface. Comparing the dynamics models of the interface process

a better fitting result is achieved. The results of this study have certain significance for the exploration of soft rock softening interface.

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