Mechanical characteristics of failure and rockburst proneness of fractured granite from Shuangjiangkou hydropower station under triaxial loading and unloading

Gong, Haibiao; Luo, Yi; Xu, Kun; Wang, Xuyi; Tao, Yuhang; Li, Xinping

doi:10.1007/s10064-023-03281-6

Cited by 6 publications

(2 citation statements)

References 33 publications

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“…They discovered that the growth rate of elastic energy and dissipated energy increased gradually with the increase of deviatoric stress. Gong et al [11] conducted triaxial loading and unloading tests of fractured rock samples with different dip angles under different stress paths. The results showed that failure modes of fractured granite under triaxial loading and unloading are primarily dominated by shear failure.…”

Section: Introductionmentioning

confidence: 99%

Conventional triaxial loading and unloading test and PFC numerical simulation of rock with single fracture

Tang,

Chen,

Xiong

et al. 2024

Archives of Civil Engineering

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Take the metamorphic sandstone as the reference object, by making rock like samples with fractures, the conventional triaxial loading and unloading test and PFC numerical simulation of rock like sample with single fracture were conducted, and the effects of the loading path, inclined angle of fracture, axial stress level during unloading, initial confining pressure during unloading on the compressive strength, peak strain and crack propagation evolution of the samples were considered. The compressive strength of the specimen under triaxial unloading is smaller than that under triaxial loading. The peak strain of the specimen under triaxial unloading is also smaller than that under triaxial loading. The specimen is more prone to brittle failure. When the axial stress level is the same during unloading, with the increase of the initial confining pressure during unloading, the difference of the compressive strength of the specimens with different inclined angles of fracture gradually decreases. Under the condition of uniaxial compression and triaxial compression, the failure of all specimens is tensile failure, and the shear failure is the main one during unloading.

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Section: Introductionmentioning

confidence: 99%

Conventional triaxial loading and unloading test and PFC numerical simulation of rock with single fracture

Tang,

Chen,

Xiong

et al. 2024

Archives of Civil Engineering

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show abstract

“…Cheng et al [11] studied the effect of rigid structural planes on rockbursts under biaxial compression, they analyzed the rockburst evolution process and its microscopic characteristics. Gong et al [12] carried out rockburst tests of granite with different fissure angles under true triaxial single-sided unloading, and they discussed the occurrence mechanism of rockburst from the mechanical properties and energy evolution characteristics. The above studies have revealed the disaster-causing mechanism of this rockburst type from the experimental view.…”

Section: Introductionmentioning

confidence: 99%

Study on Catastrophe Information Characteristics of Strain-Structural Plane Slip Rockburst in Deep Tunnels

Guo,

Zhu,

Zhang

et al. 2023

Applied Sciences

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Rigid structural planes encountered during construction have an obvious influence on rockburst intensity and occurrence mechanism. The high-intensity rockburst induced by the structural plane poses a great threat to the safety construction of the tunnel. A novel 3D discrete element numerical analysis method for rockburst is proposed with the help of the bonded block model and multi-parameter rockburst energy index. According to this method, the influence of multivariate information characteristics such as stress, energy, fracture, and rockburst proneness index on the surrounding rock during the strain-structural plane slip rockburst in deep tunnels is systematically investigated. The results are drawn as follows: The results show that from the analysis of multivariate information characteristics of strain-structural plane slip rockburst, the rock between the plane and tunnel is a typical rockburst risk area. The dip angle, length, and relative distance of the structural plane have a significant influence on the multivariate catastrophe information characteristics of the surrounding rock: As the dip angle increases, the fracture propagation range within the risk rock expands, but the rockburst intensity and the occurrence range gradually decrease; as the length increases, the fracture propagation range, rockburst intensity and occurrence range within the risk rock increase slightly; as the relative distance increases, the fracture propagation range and rockburst intensity gradually weaken, and the occurrence range of rockburst first increases and then decreases. Using the “11.28” strain-structural plane slip rockburst case as a basis, engineering validation research was conducted. The simulation results are found to be essentially consistent with the rockburst condition on the field, validating the rationality and applicability of the novel rockburst analysis method proposed in this paper.

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Characteristics and Association Mechanism of Energy Dissipation and Crack Development in Siltstone Under Triaxial Cyclic Loading and Unloading

Liu,

Miao,

Liang

et al. 2024

Rock Mech Rock Eng

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Mechanical characteristics of failure and rockburst proneness of fractured granite from Shuangjiangkou hydropower station under triaxial loading and unloading

Cited by 6 publications

References 33 publications

Conventional triaxial loading and unloading test and PFC numerical simulation of rock with single fracture

Conventional triaxial loading and unloading test and PFC numerical simulation of rock with single fracture

Study on Catastrophe Information Characteristics of Strain-Structural Plane Slip Rockburst in Deep Tunnels

Characteristics and Association Mechanism of Energy Dissipation and Crack Development in Siltstone Under Triaxial Cyclic Loading and Unloading

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