Experimental study on the irreversible displacement evolution and energy dissipation characteristics of disturbance instability of regular joints
陆军工程大学王明洋院士团队：深部岩体中扰动引起的剪切失稳机理揭秘
Jianan Yang, 范鹏贤, 王明洋, Jie Li, Lu Dong
发布时间：2023-03-15
关键词：Experimental study on the irreversible displacement evolution and energy dissipation characteristics of disturbance instability regular joints
摘要：在对深部岩体结构灾变中扰动引起的剪切失稳机理进行的研究中，研究者利用MTS 815材料测试机进行了一系列实验。通过这些研究结果，我们对深部岩体结构灾变中扰动引起的剪切失稳机理有了更深入的了解，并为合理确定结构面扰动失稳准则提供了重要的数据支持。这些发现对于加强岩体工程安全与保护，以及地下防护结构的设计与优化具有重要的实际意义。
阅读全文 PDF 引用Research on in situ stress inversion of deep-buried tunnel based on pressure/tension axis mechanism and geological structure
Guanfu Chen, Xiaoli Liu, Danqing Song
发布时间：2023-02-21
关键词：deep tunnel, focal mechanism, geological structure, microseismic monitoring, stress inversion
摘要：Highlights A comprehensive judgment method coupled with P/T axis mechanism and geological structure (PTGS) is proposed to invert the in-situ stress. Combine the focal mechanism with the geological structure to analyze the general situation of the focal area.
阅读全文 PDF 引用Deformation characteristics and novel strain criteria of strainbursts induced by low-frequency cyclic disturbance
Lihua Hu, Minghe Ju, Peng Zhao, Xiaozhao Li
发布时间：2023-02-20
关键词：dynamic disturbance, low frequency, strainbursts, strain criteria, true triaxial
摘要：Highlights Deformation characteristics of strainbursts induced by low-frequency cyclic disturbance are investigated based on true triaxial experiments. Two novel strain criteria, that is, the control strain criterion and the strain ratio criterion, for predicting cyclic-induced strainbursts are proposed. The occurrence of a cyclic-induced strainburst is controlled by the control strain. When the strain ratio εsd/εu is greater than 30%, a cyclic-induced strainburst will be induced.
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