不规则柱状节理岩体常规三轴压缩力学各向异性试验研究

doi:10.13722/j.cnki.jrme.2022.0272

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摘要 Based on 3D printing and physical model test method，artificial irregular columnar jointed rock mass specimens with seven different dip angles were prepared by one-shot moulding method where brittle green wax was chosen as 3D printing material to print irregular columnar joint network in which white cement slurry was poured. Conventional triaxial compression tests were performed on these artificial irregular columnar jointed rock mass specimens，from which their strength and deformation anisotropy and typical failure modes were derived. From the experimental results，it showed that the strength，deformation modulus and lateral strain ratio of irregular columnar jointed rock mass exhibited moderate or high anisotropy and confining pressure had significant effect on its mechanical anisotropy. Furthermore，the typical failure modes of irregular columnar jointed rock mass under conventional compression condition had been classified into four kinds，that was，Y-shaped conjugate shear failure along columnar joints，splitting failure along both intact column and columnar joint，shear slip failure along columnar joint and axial splitting of intact columns. Finally，the influence of 3D printed green wax irregular columnar joint network on mechanical behaviors of irregular columnar jointed rock mass was analyzed.

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	肖维民1
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	韩俊成1
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	田梦婷1
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	吴志友1
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关键词 ： rock mechanics, rock mass, columnar joints, conventional triaxial compression test, mechanical anisotropy

Abstract：Based on 3D printing and physical model test method，artificial irregular columnar jointed rock mass specimens with seven different dip angles were prepared by one-shot moulding method where brittle green wax was chosen as 3D printing material to print irregular columnar joint network in which white cement slurry was poured. Conventional triaxial compression tests were performed on these artificial irregular columnar jointed rock mass specimens，from which their strength and deformation anisotropy and typical failure modes were derived. From the experimental results，it showed that the strength，deformation modulus and lateral strain ratio of irregular columnar jointed rock mass exhibited moderate or high anisotropy and confining pressure had significant effect on its mechanical anisotropy. Furthermore，the typical failure modes of irregular columnar jointed rock mass under conventional compression condition had been classified into four kinds，that was，Y-shaped conjugate shear failure along columnar joints，splitting failure along both intact column and columnar joint，shear slip failure along columnar joint and axial splitting of intact columns. Finally，the influence of 3D printed green wax irregular columnar joint network on mechanical behaviors of irregular columnar jointed rock mass was analyzed.

Key words： rock mechanics rock mass columnar joints conventional triaxial compression test mechanical anisotropy

引用本文:

肖维民1，2，韩俊成1，2，田梦婷1，2，吴志友1，2. 不规则柱状节理岩体常规三轴压缩力学各向异性试验研究[J]. 岩石力学与工程学报, 2023, 42(S1): 3131-3140.
XIAO Weimin1，2，HAN Juncheng1，2，TIAN Mengting1，2，WU Zhiyou1，2. Experimental study on mechanical anisotropy of irregular columnar jointed rock mass under conventional triaxial compression condition. , 2023, 42(S1): 3131-3140.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2022.0272 或 http://rockmech.whrsm.ac.cn/CN/Y2023/V42/IS1/3131

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