The primary objective of this study was to examine and analyze the sliding behavior of rock wedge slopes with the interaction of three joint sets, considering the influence of plunge angles, included wedge angles between joints, and gravity conditions. The discontinuity planes with varying dip directions relative to the wedge's plunge direction were analyzed. The stability assessment of wedge failure was initially reviewed, explicitly focusing on limit equilibrium (LE) analysis and in-house physical tests. Centrifuge tests and discrete element analysis using the 3DEC software were then performed to explore the factors influencing the failure characteristics of the slopes. Additionally, two mitigation strategies were proposed to enhance the stability of the rock wedge slopes. The key findings include the significant impact of plunge angle on wedge slope stability compared to the included wedge angle between joints, the strong effect of gravitational conditions on the collapsing ratio of wedge units, and the higher risk posed by wedge slopes with discontinuity planes dipping out of the slope. The numerical simulation results highlighted the importance of considering joint spacing in slope stability assessments. Mitigation methods such as fixing key wedge blocks were found to effectively reduce the wedge collapsing ratio and improve rock slope stability under more realistic stress levels. This study provides valuable insights for formulating prevention and mitigation strategies, useful for enhancing safety and reducing the potential damage caused by rock wedge failure events.

中文翻译：

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探索节理方向对岩石楔稳定性的影响：实验和离散元分析


本研究的主要目的是检查和分析岩石楔形边坡在三个节理组相互作用下的滑动行为，考虑切入角的影响，包括节理之间的楔角和重力条件。分析了相对于楔块的切入方向具有不同倾角方向的不连续平面。最初审查了楔块失效的稳定性评估，明确侧重于极限平衡（LE）分析和内部物理测试。然后利用3DEC软件进行离心试验和离散元分析，探讨影响边坡破坏特征的因素。此外，还提出了两种缓解策略来增强岩石楔形边坡的稳定性。主要发现包括与节理之间包含的楔角相比，倾角对楔形边坡稳定性的显着影响、重力条件对楔形单元倒塌率的强烈影响，以及具有不连续面倾斜的楔形边坡所带来的更高风险的斜坡。数值模拟结果强调了在边坡稳定性评估中考虑节理间距的重要性。研究发现，固定关键楔块等缓解方法可以有效降低楔块崩塌率，提高岩质边坡在更现实的应力水平下的稳定性。这项研究为制定预防和缓解策略提供了宝贵的见解，有助于提高安全性并减少岩楔破坏事件造成的潜在损害。