Based on the nonlinear Barton-Bandis (B–B) failure criterion, this study considers the system reliability of rock wedge stability under the pseudo-static seismic load. The failure probability (P_f) of the system is calculated based on the Monte–Carlo method when considering parameter correlation and variability. Parameter analysis and sensitivity analysis are carried out to explore the influence of parameters on reliability. The relationships among the failure probability, safety factor (F_s), and variation coefficient are explored, and then stability probability curves of the rock wedge under the pseudo-static seismic load are drawn. The results show that the parameter correlation of the B–B failure criterion has a significant influence on the failure probability, but correlation increases system reliability or decreases system reliability affected by other parameters. Under the pseudo-static seismic action, sliding on both planes is the main failure mode of wedge system. In addition, the parameters with relatively high sensitivity are two angles related to the joint dip. When the coefficient of variation is consistent, the probability of system failure is a function of the safety factor.

基于非线性Barton-Bandis（BB）破坏准则，本研究考虑了准静态地震载荷下岩楔稳定性的系统可靠性。考虑参数相关性和可变性时，系统的故障概率（P _f）是基于Monte-Carlo方法计算的。进行参数分析和灵敏度分析，以探索参数对可靠性的影响。失效概率与安全系数（F _s）之间的关系），并探索变化系数，然后绘制拟静力地震荷载作用下的岩石楔形稳定概率曲线。结果表明，B–B失效准则的参数相关性对失效概率有重大影响，但是相关性增加了系统可靠性或降低了受其他参数影响的系统可靠性。在准静态地震作用下，在两个平面上滑动都是楔形系统的主要破坏模式。另外，具有较高灵敏度的参数是与关节倾角有关的两个角度。当变化系数一致时，系统故障的可能性就是安全系数的函数。