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为了对地下岩石结构长期稳定性进行评估,掌握岩石的时间依存性特征非常重要。单轴压缩应力条件下岩石的载荷速率依存性特征、蠕变及松弛特性等研究取得了丰富的研究成果,但围压的影响效应仍然研究较少。对近期的岩石性质的时间相依性特征进行了总结分析,重点关注了围压的影响效应。首先,对比分析围压和单轴作用下岩石性质的时间依存性特征的不同,讨论围压的影响规律。借助于前人的研究成果和数据,对岩石的荷载速率依存性、蠕变及其之间的关系进行研究。从理论上解释了岩石时间依存性特征与岩石性质和尺寸效应的概率分布之间的密切关系。最后,围压作用下岩石时间依存性特征研究的装备和试验方法进行了介绍。
In order to assess the long-term stability of underground rock structures, it is important to understand the time-dependent characteristics of the rock. Uniaxial compressive stress rock load rate dependency characteristics, creep and relaxation characteristics of the study has made a wealth of research results, but the effect of confining pressure is still less studied. The recent characteristics of time dependence of rock properties are summarized and analyzed, focusing on the effect of confining pressure. First of all, by contrasting the different characteristics of the time dependence of rock properties under confining pressure and uniaxial action, the influence law of confining pressure is discussed. With the help of previous research results and data, the relationship between rock loading rate dependence and creep and its relationship was studied. It is theoretically explained that there is a close relationship between the characteristics of rock time dependence and the probability distribution of rock properties and size effects. Finally, the equipment and test methods for studying the time-dependent characteristics of rocks under confining pressure are introduced.