Residual stress measurement and analysis of siliceous slate-containing quartz veins

Wang, Tao; Ye, Weiwei; Tong, Yemeng; Jiang, Naisheng; Liu, Liyuan

doi:10.1007/s12613-023-2667-9

Cited by 7 publications

(2 citation statements)

References 24 publications

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“…Liu et al [21] evaluated the importance of confining stresses on the mechanical properties of rock materials with the help of fitting analysis of quantitative equations in similar simulation experiments. Wang et al [22] measured and calculated the residual stresses in quartz veins of silica-bearing slate by the X-ray diffractometer method.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Impact of Locked-In Stress on Rock Failure Processes and Energy Evolutions

Wang,

Liu,

Liu

et al. 2023

Materials

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Locked-in stress refers to internal stress present within rock formations that can influence the failure process of rocks under specific conditions. A simplified mechanical model is applied, drawing on elasticity and the hypothesis of locked-in stress, to explore the influence of locked-in stress on the mechanical properties of loaded rocks. An analytical solution is obtained for the stress distribution in a failure model of rocks that include locked-in stress. The findings demonstrate that the geometry and orientation of stress inclusions within the rock influence the initiation and propagation of cracks under the combined influence of locked-in stress and high-stress conditions. Moreover, the presence of locked-in stress substantially reduces the rock’s capacity to withstand maximum stress, thereby increasing its susceptibility to reaching a state of failure. The increase in closure stress leads to a significant increase in the magnitude of the maximum stress drop and radial strain variation within the rock, resulting in reduced strength and a shortened life of the ageing failure of the rock. In addition, the influence of stress inclusions on energy dissipation is investigated, and a novel relationship is established between the roughness coefficient of the rock structure surface and the angle of the rock failure surface. This relationship serves to characterize the linear dynamic strength properties of rock materials containing locked-in stress. This investigation not only advances the comprehension of stress distribution patterns and the effects of locked-in stress on rock failure patterns but also facilitates a more precise portrayal of the nonlinear features of alterations in the rock stress-strain curve under the influence of confined stress. These findings provide a solid theoretical foundation for ensuring the safety of excavations in various deep engineering projects.

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Section: Introductionmentioning

confidence: 99%

Numerical Study on the Impact of Locked-In Stress on Rock Failure Processes and Energy Evolutions

Wang,

Liu,

Liu

et al. 2023

Materials

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“…There are many initial cracks of different scales inside the rock mass. These cracks not only alter the mechanical characteristics of the rock but also, under external forces, the propagation and connection of cracks lead to rock failure and ultimately result in engineering accidents [2][3][4]. The propagation and interconnection of cracks within the rock mass account for the majority of failure occurrences in rock and soil engineering, such as the landslide that occurred in Yanchihe Phosphorus Mine, Yichang City, Hubei Province, China, in 1980, and the water seepage accident during the construction of Foshan Subway Line 2 in 2018.…”

Section: Introductionmentioning

confidence: 99%

Impact of Crack Inclination Angle on the Splitting Failure and Energy Analysis of Fine-Grained Sandstone

Wang

Liu

et al. 2023

Applied Sciences

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To investigate the impact of crack inclination angle on the tensile strength and characteristics of splitting failure in rock, split tests were conducted on fine-grained sandstone with pre-existing cracks under different crack inclination angle conditions. Acoustic emission and digital image techniques were continuously monitored during the tests. The evolution of absorbed energy during the loading and failure processes was calculated and discussed, aiming to elucidate the interconnections among the maximum absorbed energy, the pre-existing crack inclination angle, the tensile strength, and the acoustic emission energy of the rock, which can provide a reference for the design and construction of tunnels or mines in rock formations with pre-existing cracks. The experimental findings indicate the following: (1) The tensile strength and failure displacement decrease first and then increase with the increase in the pre-existing crack inclination angle, demonstrating an approximate “V”-shaped alteration. (2) The failure modes of specimens with pre-existing cracks can be classified into three types: tensile failure along the center of the disk, tensile failure along the tip of the pre-existing crack, and tensile–shear composite failure along the tip of the pre-existing crack. (3) The crack inclination angle exerts a substantial influence on the evolution curve of energy absorption. The maximum energy absorption of the specimens first increases and then decreases with the increase in the crack inclination angle. Moreover, a corresponding nonlinear relationship is observed between the maximum energy absorption and the tensile strength, as well as the AE energy.

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Disturbance failure mechanism of highly stressed rock in deep excavation: Current status and prospects

Wang,

Ye,

Liu

et al. 2024

Int J Miner Metall Mater

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Residual stress measurement and analysis of siliceous slate-containing quartz veins

Cited by 7 publications

References 24 publications

Numerical Study on the Impact of Locked-In Stress on Rock Failure Processes and Energy Evolutions

Numerical Study on the Impact of Locked-In Stress on Rock Failure Processes and Energy Evolutions

Impact of Crack Inclination Angle on the Splitting Failure and Energy Analysis of Fine-Grained Sandstone

Disturbance failure mechanism of highly stressed rock in deep excavation: Current status and prospects

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