本项目以处于低频震源环境中工程岩体的变形失稳灾害为研究背景，以蠕变-疲劳交互作用下岩石的变形损伤失稳这一关键科学问题为核心，以探究蠕变-疲劳交互作用下岩石变形损伤演化规律为目标，基于一定的蠕变-疲劳载荷路径开展不同应力水平、应力幅值、围压、保载时间、频率等条件下的岩样变形破裂及声发射试验，研究蠕变-疲劳交互作用下岩石变形损伤演化规律及各因素对岩石变形损伤的影响规律，建立蠕变-疲劳交互作用下的岩石变形损伤失稳数学力学模型，编制开发蠕变-疲劳交互作用下岩石变形损伤过程数值仿真模拟方法，并开展一系列蠕变-疲劳交互作用下岩石变形损伤失稳的大规模数值试验研究，揭示蠕变-疲劳交互作用条件下岩石的变形损伤过程及其失稳破坏机理，提出符合工程实际且便于现场应用的岩石失稳寿命估计模型，以期为工程岩体的变形失稳控制方法及长期稳定性预测提供理论和应用基础。

The instability of engineering rockmass frequently occurs in weak earthquake zone with low-frequency. In this project, we focus on the the key scientific issue, viz., damage and fracturing of rock under fatigue and creep interaction and aim at gaining an insight into the damage and fracturing mechanism of rock under fatigue and creep interaction. A series of loading experiments and AE (acoustic emission) tests on rock under various stress levels, stress amplititudes, confining pressures, loading durations, and frequencies are performed according to pre-designed creep and fatigue stress paths to study the characteristics of deformation and damage evolution and to investigate the effect of stress levels, stress amplititudes, loading durations, and frequencies on deformation and damage. Based on above, we will derive a mechanical damage model of rock under fatigue and creep interaction, estabilish numerical method of describe the proposed model of rock under fatigue and creep interaction, carry out large-scale numerical simulations on rock damage and fracturing under fatigue and creep interaction, reveal the damage and failure mechanism of rock under fatigue and creep interaction, and propose a feasible and relible life estimation model of rock applicable to rock engineering in field. It is of great importance to control and prevent the catastrophic creep failure of rock mass and minimizes the impact of rockmass instability hazards on rock engineering activities, meanwhile, it is also of significance to develop a better understanding of the safe and efficient rock engineering design and operation and provide a theoretical basis to predict the deformation and long-term stability of rock engineering.