【摘要】 深部硬岩在开挖卸荷之后处于无侧限压缩状态下,岩体在持续高地应力作用下发生蠕变现象影响隧道的长期稳定性。本文通过室内试验获取试样的基本物理力学参数,以弹性损伤理论为基础,考虑非均匀岩石介质蠕变破裂特性,通过RFPA^2D-creep软件建立模型分析岩石材料非均匀性对蠕变过程的影响。结论表明,岩石的宏观破裂是内部细观单元损伤累计的结果,岩石的非均匀性对宏观破裂影响在较大荷载下可以忽略,此结论对于探究岩石非均匀性影响岩石宏观破裂特性规律具有重要的学术研究价值和工程实践意义。更多还原

【Abstract】 The deep hard rock is in unconfined compression condition after excavation unloading,and the creep phenomenon ofrock mass occurs under the action of continuous high groundstress. In this paper,the basic physical and mechanical parame-ters of the samples are obtained through laboratory tests. Basedon the elastic damage theory,considering the creep rupture characteristics of heterogeneous rock medium, the creep process issimulated by RFPA^2D-creep. The conclusion shows that themacro fracture of rock is the result of damage accumulation of internal meso unit,and the influence of rock heterogeneity on macro fracture is under large load This conclusion has important academic research value and engineering practice significance forexploring the influence of rock heterogeneity on rock macro fracture characteristics.更多还原