In order to explore the micro-cracking behavior and fractal characteristics of sandstone with different particle sizes under the condition of compression-shear test, this paper studies sandstone with different particle sizes by using high-strength concrete wrapped in cylindrical sandstone test specimen to carry out a compression-shear mechanical test, with the assistance of performing 3D optical scanning on the fracture surface of sandstone after shear failure by using MATLAB to re-establish the three-dimensional shape of the fracture surface. The roughness parameter of the joint surface is introduced to quantitatively calculate the fracture structural plane, which found that the roughness parameter manifests the damage of the structural plane well. The roughness of fracture surface is negatively correlated with the particle size of sandstone, that is, the roughness of fracture surface increases with the decrease of particle size. The fractal dimension of the structural trace line and the sampling area is calculated according to the digital model. Obvious anisotropic characteristics are observed in both dimensions, where the fractal dimension is positively correlated with the particle size of sandstone, in another word, the fractal dimension decreases along with the particle size. The above research results provide experimental support in scientific theory for clarifying the instability mechanism of sandy rock roadway under compression-shear conditions.


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    Titel :

    Study on Meso-Fracture Behavior and Fractal Characteristics of Sandstone with Different Particle Sizes under Compression-Shear Test Conditions


    Weitere Titelangaben:

    KSCE J Civ Eng


    Beteiligte:
    Peng, Rui (Autor:in) / Zhuang, Tong (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2023-07-01


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch






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