Cognition of the deformation and failure characteristics of rock under progressive damage conditions is quite important for the stability assessment and numerical back analysis of underground projects. A series of cyclic loading/unloading tests for the Jinping marble were carried out to investigate its coupling deterioration evolution of mechanical parameters during the elastoplastic deformation and failure process. First, based on the triaxial cyclic loading and unloading testing results under different confining pressures, the evolution rules of its mechanical parameters were obtained. Second, some nonlinear evolution models were established to describe the progressive deterioration evolution of Young’s modulus, cohesion, internal friction angle, and dilation angle respectively by introducing a new plastic internal variable with confining pressure dependence. Third, the modified binary-medium model was presented to reveal the coupling evolution mechanism of marble’s strength parameters by describing the increase and decrease of the relative volume fraction of the bonding element and frictional element regulated by the load sharing principle. Finally, a new interaction matrix for marble’s mechanical parameters was developed based on the multi-dimensional triangular pyramid type interrelations. The results can provide a reference for parameter deterioration during the establishment of mechanical models, stability assessment, and numerical back analysis for underground engineering.

认识岩石在渐进损伤条件下的变形破坏特征，对于地下工程的稳定性评价和数值反分析具有重要意义。对锦屏大理岩进行一系列循环加卸载试验，研究弹塑性变形破坏过程中力学参数的耦合退化演化。首先，根据不同围压下的三轴循环加卸载试验结果，得出其力学参数的演化规律。其次，建立了一些非线性演化模型来描述杨氏模量、内聚力、内摩擦角、和扩张角分别通过引入一个新的具有围压依赖性的塑性内部变量。第三，提出了改进的二元介质模型，通过描述受载荷分配原理调节的粘结元素和摩擦元素的相对体积分数的增减，揭示了大理石强度参数的耦合演化机制。最后，基于多维三角金字塔类型的相互关系，开发了一个新的大理石力学参数交互矩阵。研究结果可为地下工程力学模型建立、稳定性评价、数值反分析等参数劣化提供参考。提出了改进的二元介质模型，通过描述受载荷分配原理调节的粘结元素和摩擦元素的相对体积分数的增减，揭示了大理石强度参数的耦合演化机制。最后，基于多维三角金字塔类型的相互关系，开发了一个新的大理石力学参数交互矩阵。研究结果可为地下工程力学模型建立、稳定性评价、数值反分析等参数劣化提供参考。提出了改进的二元介质模型，通过描述受载荷分配原理调节的粘结元素和摩擦元素的相对体积分数的增减，揭示了大理石强度参数的耦合演化机制。最后，基于多维三角金字塔类型的相互关系，开发了一个新的大理石力学参数交互矩阵。研究结果可为地下工程力学模型建立、稳定性评价、数值反分析等参数劣化提供参考。基于多维三角金字塔类型的相互关系，开发了一种新的大理石力学参数交互矩阵。研究结果可为地下工程力学模型建立、稳定性评价、数值反分析等参数劣化提供参考。基于多维三角金字塔类型的相互关系，开发了一种新的大理石力学参数交互矩阵。研究结果可为地下工程力学模型建立、稳定性评价、数值反分析等参数劣化提供参考。