Macro-Meso failure mechanisms and slip characteristics of jointed sandstone under uniaxial compression
Fault sliding is one of the important causes of induced coal mine dynamic disasters during deep mining. To systematically investigate the slip behavior of fault structures under in-situ stress conditions, jointed sandstone specimens with different joint inclinations were prepared, and uniaxial compr...
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Elsevier
2025-06-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025013088 |
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| author | Junguang Wang Song Yang Bing Liang Tianyu Xin Lingran Ren |
| author_facet | Junguang Wang Song Yang Bing Liang Tianyu Xin Lingran Ren |
| author_sort | Junguang Wang |
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| description | Fault sliding is one of the important causes of induced coal mine dynamic disasters during deep mining. To systematically investigate the slip behavior of fault structures under in-situ stress conditions, jointed sandstone specimens with different joint inclinations were prepared, and uniaxial compression tests of jointed sandstone and multi-scale mechanical analysis were carried out by combining acoustic emission(AE) monitoring and digital image correlation(DIC) technique. A discrete element model was developed to simulate jointed sandstone, with model validity confirmed through parametric calibration. The results show that: (1)The stress-strain response of jointed sandstone specimens exhibits a distinctive edge dislocations stage, which gradually changes into a joint slip stage with the increase of joint inclination; (2)The presence of joints significantly reduces the rock strength, altering failure modes from tensile-shear conjugate failure to shear-slip instability; (3)The larger the joint inclination, the more concentrated the crack distribution, the more energy dissipation, and the greater the slip risk. The microcrack initiation is at its earliest near the joint. (4)According to the definition of W as the ratio of dashpot energy to slip energy during loading, two failure modes of jointed sandstone are given, namely “Slip + Crack propagation dominant type” and “Crack propagation + Slip dominant type”. The research results can provide a reference for the prevention and control of coal mine dynamic disasters induced by fault activation. |
| format | Article |
| id | doaj-art-21167ef1ff984aafb37e7a1b171d7af4 |
| institution | DOAJ |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
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| series | Results in Engineering |
| spelling | doaj-art-21167ef1ff984aafb37e7a1b171d7af42025-08-20T02:57:30ZengElsevierResults in Engineering2590-12302025-06-012610523810.1016/j.rineng.2025.105238Macro-Meso failure mechanisms and slip characteristics of jointed sandstone under uniaxial compressionJunguang Wang0Song Yang1Bing Liang2Tianyu Xin3Lingran Ren4Ordos Research Institute, Liaoning Technical University, Ordos 017004, PR China; School of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, PR ChinaOrdos Research Institute, Liaoning Technical University, Ordos 017004, PR China; School of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, PR China; Corresponding author. No.47 Zhonghua Road, Xihe District, Fuxin City, Liaoning Province, PR China.School of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, PR ChinaOrdos Research Institute, Liaoning Technical University, Ordos 017004, PR China; Safety Science and Engineering College, Liaoning Technical University, Fuxin 123000, PR ChinaSchool of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, PR ChinaFault sliding is one of the important causes of induced coal mine dynamic disasters during deep mining. To systematically investigate the slip behavior of fault structures under in-situ stress conditions, jointed sandstone specimens with different joint inclinations were prepared, and uniaxial compression tests of jointed sandstone and multi-scale mechanical analysis were carried out by combining acoustic emission(AE) monitoring and digital image correlation(DIC) technique. A discrete element model was developed to simulate jointed sandstone, with model validity confirmed through parametric calibration. The results show that: (1)The stress-strain response of jointed sandstone specimens exhibits a distinctive edge dislocations stage, which gradually changes into a joint slip stage with the increase of joint inclination; (2)The presence of joints significantly reduces the rock strength, altering failure modes from tensile-shear conjugate failure to shear-slip instability; (3)The larger the joint inclination, the more concentrated the crack distribution, the more energy dissipation, and the greater the slip risk. The microcrack initiation is at its earliest near the joint. (4)According to the definition of W as the ratio of dashpot energy to slip energy during loading, two failure modes of jointed sandstone are given, namely “Slip + Crack propagation dominant type” and “Crack propagation + Slip dominant type”. The research results can provide a reference for the prevention and control of coal mine dynamic disasters induced by fault activation.http://www.sciencedirect.com/science/article/pii/S2590123025013088Jointed sandstoneSlip characteristicsDiscrete element methodJoint inclinationFailure mechanism |
| spellingShingle | Junguang Wang Song Yang Bing Liang Tianyu Xin Lingran Ren Macro-Meso failure mechanisms and slip characteristics of jointed sandstone under uniaxial compression Results in Engineering Jointed sandstone Slip characteristics Discrete element method Joint inclination Failure mechanism |
| title | Macro-Meso failure mechanisms and slip characteristics of jointed sandstone under uniaxial compression |
| title_full | Macro-Meso failure mechanisms and slip characteristics of jointed sandstone under uniaxial compression |
| title_fullStr | Macro-Meso failure mechanisms and slip characteristics of jointed sandstone under uniaxial compression |
| title_full_unstemmed | Macro-Meso failure mechanisms and slip characteristics of jointed sandstone under uniaxial compression |
| title_short | Macro-Meso failure mechanisms and slip characteristics of jointed sandstone under uniaxial compression |
| title_sort | macro meso failure mechanisms and slip characteristics of jointed sandstone under uniaxial compression |
| topic | Jointed sandstone Slip characteristics Discrete element method Joint inclination Failure mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025013088 |
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