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中文摘要：
瑞典Aspo硬岩地下实验室开展的APSE试验的主要目的在于分析岩柱在开挖及加热过程中的力学响应及渐进破坏过程,其岩柱热–力耦合特性的数值模拟研究是国际合作研究计划DECOVALEX-2011项目的3大研究课题之一。采用热弹性耦合模型研究了APSE岩柱在开挖及加热过程中的应力、变形及温度变化规律,表明热弹性耦合模型对完整致密岩体的热-力耦合特性具有较好的描述能力,计算结果总体上反映了岩柱在开挖及加热过程中的应力调整和温度变化特征,并可对岩柱壁面的破坏特征及扩展规律进行定性解释。但因缺乏对岩体中多相流运动过程和渐进破坏过程的描述能力,热弹性耦合模型也表现出较大的局限性。研究成果对中国北山预选区核废料硬岩储库围岩的稳定性评价具有一定的参考意义。
英文摘要：
The goal of the sp Pillar Stability Experiment performed in sp Hard Rock Laboratory,Sweden is to investigate the mechanical response and progressive failure process of a hard rock pillar during excavation and heating.Numerical simulation of the thermal elastic behaviors for the pillar is one of the three tasks of the DECOVALEX-2011 project.The evolutions of stress,deformation and temperature of the pillar are modeled by using a coupled thermal elasticity model.The research results demonstrate that the thermal elasticity model is suitable for describing the coupled thermal mechanical behaviors of the pillar during excavation and heating.The stress redistribution and temperature evolution processes of the pillar are largely modeled,and the failure process and its propagation are qualitatively analyzed.The major limitations of the thermal elasticity model are its absence of the multiphase flow and progressive failure processes.The model developed and the modeling experiences accumulated in this study may be helpful for the stability and safety assessment of the hard granite host rock in China＇s Beishan preselected area for high-level radioactive waste disposal.
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A new parabolic variational inequality formulation of Signorini's condition for non-steady seepage p
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