New Modified Model for Estimating the Peak Shear Strength of Rock Mass Containing Nonconsecutive Joint Based on a Simulated Experiment

Hu, Jie; Li, Shucai; Liu, Hongliang; Li, Liping; Shi, Shaoshuai; Qin, Chengshuai

doi:10.1061/(asce)gm.1943-5622.0001732

Cited by 19 publications

(5 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As underground engineering has progressed to vast and burial depths and spans, the stress state of the rock mass has become more complex. Rock mass collapses are common, with tensile, compressive-shear, and tensile-shear failure being three common failure types [1]. Mechanical fatigue can be viewed as a process of gradual accumulation of damage in rock specimens under stress or strain, a process that leads to changes in the structure and properties of rock specimens and the creation and expansion of cracks and fractures [2].…”

Section: Introductionmentioning

confidence: 99%

Research on Acoustic Emission Characteristics and Crack Evolution during Rock Failure under Tensile and Tensile- and Compressive-Shear Stress States

Xu,

Hu,

et al. 2024

Applied Sciences

Self Cite

View full text Add to dashboard Cite

Tensile, compressive-shear, and tensile-shear failure are three typical failure modes of rock- and lining-support structural materials in underground engineering. Comparative studies of the acoustic emission (AE) evolution characteristics of specimens of the same shape and size under different stress states are of great significance in determining universal disaster warning guidelines. Based on a self-developed multi-functional test system, direct tensile, compressive-shear, and tensile-shear tests were conducted on intact and jointed rock-like specimens, comparing AE amplitude and peak frequency parameters under different failure modes from the perspectives of crack scale and crack type evolution. All failure tests were monitored with microcrack propagation at an early stage until ultimate rupture occurred at the peak-load moment. As a result, the “quiet-period” could only be observed from the compressive-shear test. The AE signals distributed in three bands can be used as an indicator of failure identifications. Tensile and shear cracks can be identified by strong and weak amplitudes of low- and high-frequency signals. These results enhance the knowledge of the failure modes of rock mechanics for more applications in monitoring disasters in rock engineering.

show abstract

Section: Introductionmentioning

confidence: 99%

Research on Acoustic Emission Characteristics and Crack Evolution during Rock Failure under Tensile and Tensile- and Compressive-Shear Stress States

Xu,

Hu,

et al. 2024

Applied Sciences

Self Cite

View full text Add to dashboard Cite

show abstract

“…The rock mass joint surface is a two-dimensional geological interface with a particular direction, large extension, and small thickness of various structural relics (including faults, joints, bedding, and fractured zones) produced in the rock mass under the action of tectonic stress. The dynamic response of a rock mass is largely restricted by its joint surface (Wang and Zhang, 1982;Fox et al, 1998;Siad 2003;Liu 2017;Hu et al, 2020;Cui et al, 2021;Fw et al, 2021;Zhang et al, 2021). Therefore, the study of the dynamic characteristics of the joint surface, especially the dynamic shear characteristics, is an important prerequisite for the analysis of the dynamic response of a rock mass.…”

Section: Introductionmentioning

confidence: 99%

Calculating the shear strength of a rock mass joint surface considering cyclic shear deterioration

Wang²,

Bai

et al. 2022

Front. Earth Sci.

View full text Add to dashboard Cite

The dynamic response of rock mass is largely restricted by its joint surface. Previous studies have shown that the degradation of joint surface can not be ignored when calculating the shear strength of structural plane under cyclic load. Although several studies have attempted to calculate the cyclic shear strength of a rock mass joint surface, an established and reliable method for calculating the cyclic shear strength of rock mass discontinuities is still lacking, thus necessitating further research. In this study, the deterioration effect of the shear strength of the joint surface under cyclic shearing was first analysed using cyclic shearing tests. The influence of vibration degradation in rock mass on the structural surface, undulant angle equation of the joint surface, and calculation method for the basic friction angle under a cyclic shearing load are proposed. Furthermore, the calculation method for the shear strength of the structural surface under the action of cyclic shearing is established. The proposed method is further validated through case analysis. The influence of the cutting and filling (produced during the shearing process) on the shear strength of the joint surface cannot be disregarded. The improved model proposed in this study is in good agreement with the experimental results; however, when the improved proposed method is used to estimate the cyclic shear strength of the joint surface where the normal stress is too large, calculation results may contain certain errors.

show abstract

“…The initiation, propagation, and coalescence of multiple cracks eventually evolve into macroscopic failure 1,2 . Currently, it is widely accepted that the geomechanical behaviors of rock mass are significantly impacted by the size, shape, number, and distribution of these defects 3–7 . Especially, under disturbed stress conditions, for example, earthquake, excavation, blast vibration, drilling, and rock cutting, rock structure deteriorates quickly due to the existence of these natural flaws.…”

Section: Introductionmentioning

confidence: 99%

“…1,2 Currently, it is widely accepted that the geomechanical behaviors of rock mass are significantly impacted by the size, shape, number, and distribution of these defects. [3][4][5][6][7] Especially, under disturbed stress conditions, for example, earthquake, excavation, blast vibration, drilling, and rock cutting, rock structure deteriorates quickly due to the existence of these natural flaws. It is worth noting that the holes excavated in rock engineering, such as tunnels, shafts, and roadways, can also be considered as artificial defects formed in the rock mass.…”

Section: Introductionmentioning

confidence: 99%

Insight into the fracture evolution behavior of pre‐flawed hollow‐cylinder granite under multi‐stage increasing‐amplitude cyclic loads: A lab‐scale testing

Wang

Yang

Han

et al. 2021

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

The structural deterioration and associated fracture evolution behavior of preflawed hollow-cylinder granite subjected to multi-stage increasing-amplitude (MSIA) cyclic loads are studied herein. The influences of rock structure on volumetric deformation, damage accumulation, energy dissipation, and failure pattern were investigated. It is shown that the volumetric deformation is relatively large for rock having high flaw angle, and it is the minimum and maximum for rock having a 10 and 70 flaw angle. A damage evolution model that can describe a first fast and then steady damage propagation was proposed based on the irreversible axial strain. Much energy needs to be consumed to drive crack propagation and hole collapse for rock having high angle flaws. A series of 2D computed tomography (CT) images reveal the different crack network pattern and how it is affected by the rock structure. A more complicated crack network is found for rock having a high flaw angle.

show abstract

New Modified Model for Estimating the Peak Shear Strength of Rock Mass Containing Nonconsecutive Joint Based on a Simulated Experiment

Cited by 19 publications

References 20 publications

Research on Acoustic Emission Characteristics and Crack Evolution during Rock Failure under Tensile and Tensile- and Compressive-Shear Stress States

Research on Acoustic Emission Characteristics and Crack Evolution during Rock Failure under Tensile and Tensile- and Compressive-Shear Stress States

Calculating the shear strength of a rock mass joint surface considering cyclic shear deterioration

Insight into the fracture evolution behavior of pre‐flawed hollow‐cylinder granite under multi‐stage increasing‐amplitude cyclic loads: A lab‐scale testing

Contact Info

Product

Resources

About