Anisotropic mechanical behavior and failure characteristics of multi-jointed rock mass

Cheng, Hui; Zhao, Hongbao; Zhang, Hongwei; Sun, Wenhao

doi:10.1007/s12665-023-11031-w

Cited by 6 publications

(3 citation statements)

References 40 publications

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“…𝐵 𝛽 𝐵 90 = ( 𝛼 90 𝛼 𝛽 ) 0.5 (19) where: 𝜎 𝑐90 is the uniaxial compressive strength when the bedding plane inclination is 𝛽; 𝛼 90 and 𝐵 90 are the values of 𝛼 𝛽 and 𝐵 𝛽 when the bedding plane inclination is 𝛽, By substituting the triaxial test data into equation (17), the anisotropic parameters 𝛼 𝛽 and 𝐵 𝛽 can be calculated. Overall, the Saeidi criterion performs best in terms of fit, while the Hoek-Brown criterion demonstrates high accuracy in most cases.…”

Section: Saeidi Et Al (2014)mentioning

confidence: 99%

“…Sun et al(2022) [16] used DEM to establish a 2D numerical model of shale with varying bedding plane inclinations, examining its mechanical properties under different unloading paths and revealing damage mechanisms during unloading. Cheng et al (2023) [17] used DEM to create a numerical model of jointed rock masses, studying their anisotropic behavior and failure characteristics. They explored the effects of size, confining pressure, and loading rate on strength, energy evolution, and crack distribution within these masses.…”

Section: Introductionmentioning

confidence: 99%

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DEM-based study on mechanical behavior and strength criterion in layered slate under triaxial compression

Yang,

Li,

Zhang

et al. 2024

Preprint

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The study utilizes discrete element method simulations of triaxial compression to explore the effects of bedding plane inclination and confining pressure on layered slate's mechanical properties, crack evolution, and anisotropy. Additionally, the results were analyzed using the Hoek-Brown, Ramamurthy, and Saeidi strength criteria. The findings indicate that higher confining pressures enhance the slate's compressive strength and elastic modulus, displaying a distinct ‘U’-shape because of the joint inclination angle. Furthermore, as the bedding plane inclination angle increases, the damage mode has a progressive transition from shear damage to a combination of tensile-shear damage. At lower confining pressures, the crack count in the Parallel Bond Model exhibits ‘U’-shaped behavior, while the Smooth-Joint Contact Model follows an inverted ‘U’-shaped trajectory. With increasing confining pressure, the crack distribution stabilizes, suggesting that elevated confining pressures mitigate the influence of bedding plane inclination on compressive strength. Moreover, the compressive strength anisotropy ratios decrease with higher confining pressure, whereas the elastic modulus anisotropy ratios become more prominent. The Hoek-Brown criterion was superior upon comprehensively evaluating both model fitting accuracy and generalization capabilities. The modified Hoek-Brown criterion can accurately predict the failure strength of the slate at all inclination angles with a few experimental data.

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Section: Saeidi Et Al (2014)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

DEM-based study on mechanical behavior and strength criterion in layered slate under triaxial compression

Yang,

Li,

Zhang

et al. 2024

Preprint

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“…The energy difference between the peak point and the post-peak characteristic point is the amplitude of the abrupt energy change. The greater the amplitude of the abrupt post-peak change of U e and U d , the faster the release of energy, and the larger the degree of rock cracking and collapse [ 39 , 40 ]. Under the full-area load of S, the relation curve between amplitude of the abrupt post-peak energy change of rocks and joint angle presents a W-shape distribution.…”

Section: Energy Evolution Law Of Jointed Rocksmentioning

confidence: 99%

Failure characteristics of rocks with non-persistent joints under local load

Cheng,

Zhao

2023

PLoS ONE

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Jointed rocks under local load are ubiquitous in civil engineering. The instability and failure of jointed rocks are fatal to engineering safety. This paper numerically investigated the effects of loading area and joint angle on the strength dividing points, energy evolution, and crack distribution characteristics of non-persistent jointed rocks. The results demonstrated that the closer the absolute value of joint angle to 45° and the smaller the loading area, the lower the strength dividing points of rocks. The curves of rock joint angle versus total energy at peak and of elastic energy versus amplitude of post-peak abrupt energy change render a W-shape distribution. Meanwhile, compared with joint angle, loading area has more influence on rock energy input. The larger the loading area, the higher the crack fractal dimension, the crack entropy, and the penetration rate. Tensile cracks outnumber shear cracks when jointed rocks are damaged, and shear cracks increases significantly at the post-peak stage.

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DEM-based study on mechanical behavior and strength criterion in layered slate under triaxial compression

Yang,

Li,

Zhang

et al. 2024

Environ Earth Sci

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Anisotropic mechanical behavior and failure characteristics of multi-jointed rock mass

Cited by 6 publications

References 40 publications

DEM-based study on mechanical behavior and strength criterion in layered slate under triaxial compression

DEM-based study on mechanical behavior and strength criterion in layered slate under triaxial compression

Failure characteristics of rocks with non-persistent joints under local load

DEM-based study on mechanical behavior and strength criterion in layered slate under triaxial compression

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