EXPERIMENTAL METHODS OF MICRO-AND MESO-SCALE ROCK MASS STRUCTURAL MECHANICS AND THEIR APPLICATION PROSPECT IN THE PROTECTION OF STONE CULTURAL RELICS
Rock masses serve as the primary geological foundation for major national strategic engineering projects.The macroscopic deformation and failure of rock masses,along with their stability,are closely related to their inter-nal micro-and mesoscale structures.Traditional rock mass structural mechanics primarily focus on the macroscopic structure and its mechanical effects,but they often fall short in revealing the internal mechanisms of microstructural influence.Based on a review of international research progress in micro-and meso-scale rock mechanics,this paper introduces several commonly used experimental devices,principles,and case studies for examining the micro-and meso-scale rock mass structural mechanical behavior.These include the in-situ micro-CT testing system,the MTI-LM real-time loading-observing-acquisition system,the micro/nano-indentation device combined with large-area mineral identification and characterization techniques,and atomic force microscopy(AFM).Compared to conven-tional rock mechanics tests,micro-and meso-scale rock mass structural mechanics methods have significantly re-duced sample size,shape,and quantity requirements,and belong to micro-damage or non-destructive testing,showing vast potential for broader applications.Notably,these methods align well with the"minimal disturbance"principle crucial in the conservation of stone cultural relics.Taking the layered sandstone grottoes as an example,this paper further explores the potential applications of micro-and meso-scale rock mass structural mechanics meth-ods in the fine characterization of rock mass structure,cross-scale mechanical properties,and reinforcement effec-tiveness tests.The goal is to offer scientific support for the finer preventive protection of stone cultural relics.
Micro-and meso-scaleRock mass structural mechanicsCross-scaleStone cultural relicsPreven-tive protection
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