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<p>The structural integrity of the rock mass is crucial for slope stability, but the influence of the dip angle and layer thickness of the overlying rock layer on the slope damage process is still insufficiently studied. Therefore, this study systematically carries out large-scale physical modeling experiments and synchronously collects image, velocity, acceleration and acoustic emission (AE) data to reveal the influence mechanism of the dip angle and layer thickness of the overlying rock layer on the catastrophic damage of bedding slopes, which provides a theoretical basis for the assessment of the stability of weakly interbedded slopes and the design of disaster prevention. The main conclusions are as follows:&#xa0;as the dip angle of the overlying rock layer increases, there is a corresponding rise in the velocity and acceleration at the point of slope model failure. Conversely, these parameters decrease with an increase in the layer thickness of the overlying rock layer. During the loading phase, the bedding slope model does not exhibit a potential shear outlet, and its failure mode is characterized by “oblique cutting along the bedding”. At the moment of slope model failure, the AE accumulated absolute energy demonstrates an upward trend with the increase in dip angle and the decrease in layer thickness of the overlying rock layer. Furthermore, as the dip angle of the overlying rock layer increases, the stress concentration area progressively shifts upward and expands in scope. In contrast, with an increase in the layer thickness, the position of the stress concentration area remains largely unchanged, while its range gradually extends in a long strip shape.</p>

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Experimental Investigation on the Influence of Dip Angle and Layer Thickness of Overlying Rock Layers on the Failure Process of Bedding Slopes

  • 期刊论文

  • 发表日期：

    2025年4月14日

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  • Guoqing Chen,
  • Yan Zhang,
  • Qiang Xu,
  • Zhou Zhu,
  • Xiangsheng Zheng,
  • Jianchao Wang,
  • Minglang Zou

摘要

The structural integrity of the rock mass is crucial for slope stability, but the influence of the dip angle and layer thickness of the overlying rock layer on the slope damage process is still insufficiently studied. Therefore, this study systematically carries out large-scale physical modeling experiments and synchronously collects image, velocity, acceleration and acoustic emission (AE) data to reveal the influence mechanism of the dip angle and layer thickness of the overlying rock layer on the catastrophic damage of bedding slopes, which provides a theoretical basis for the assessment of the stability of weakly interbedded slopes and the design of disaster prevention. The main conclusions are as follows: as the dip angle of the overlying rock layer increases, there is a corresponding rise in the velocity and acceleration at the point of slope model failure. Conversely, these parameters decrease with an increase in the layer thickness of the overlying rock layer. During the loading phase, the bedding slope model does not exhibit a potential shear outlet, and its failure mode is characterized by “oblique cutting along the bedding”. At the moment of slope model failure, the AE accumulated absolute energy demonstrates an upward trend with the increase in dip angle and the decrease in layer thickness of the overlying rock layer. Furthermore, as the dip angle of the overlying rock layer increases, the stress concentration area progressively shifts upward and expands in scope. In contrast, with an increase in the layer thickness, the position of the stress concentration area remains largely unchanged, while its range gradually extends in a long strip shape.