Study on the influence of fracture dip angle on mechanical and acoustic emission characteristics of deep granite

Liu, Xiqi; Wang, Gang; Song, Leibo; Hu, Rong; Ma, Xiaoming; Ou, Xiaoping; Zhong, Shiji

doi:10.1007/s11069-023-05994-z

Cited by 5 publications

(1 citation statement)

References 31 publications

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“…Peng et al [9] studied the influence of crack dip angles on the energy characteristics of sandstones, showing that larger crack dip angles correspond to a higher energy storage but lower energy dissipation in rocks, explaining the enhanced bearing capacity with larger crack dip angles from an energy perspective. Pan et al [10] and Liu et al [11] explored the effect of crack dip angles on the mechanical properties and fracture evolution mechanism of granite under uniaxial and triaxial compression, revealing weakened brittle and enhanced plastic characteristics with varying dip angles, impacting compressive strength, elastic modulus, and failure modes. These studies not only enhance the understanding of the mechanical properties of fractured rocks, but also provide a theoretical basis for geotechnical engineering, structural design, and geological hazard assessments.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Rock Specimens Containing Pre-Existing Cracks with Different Dip Angles Based on Energy Theory and Cohesive Element Method

Tian,

Feng,

et al. 2024

Applied Sciences

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To investigate the influence of the crack dip angle on the strength of rock specimens, uniaxial compression tests were conducted on granite specimens containing pre-existing cracks. The strain energy evolution during the loading process was analyzed, and the loading-induced cracking process was simulated using the cohesive element method. Both the experimental and numerical results indicate that cracks significantly impact the plastic-yielding stage of the stress–strain curve more than the initial and elastic deformation stages. When the crack dip angle is less than 45°, the stress concentration near the crack is significant, which is an important factor affecting the strength and elastic strain energy distribution of rock specimens. When the crack dip angle is greater than 45°, the degree of stress concentration decreases, and the uniformity of the elastic strain energy distribution and the possibility of crack bifurcation increase. Combining the energy theory with the cohesive element method helps comprehensively understand the initiation, propagation, and coalescence of microcracks near pre-existing crack tips. These research results can provide a reference for geotechnical engineering design and structural stability assessment.

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Section: Introductionmentioning

confidence: 99%