Full-field quantification of time-dependent and -independent deformation and fracturing of double-notch flawed rock using digital image correlation

Xue, Yanchao; Xu, Tao; Zhu, Wenchao; Heap, Michael; Heng, Zhen; XingWei, Wang

doi:10.1007/s40948-021-00302-0

Cited by 20 publications

(6 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zhao et al and Xue et al performed uniaxial compression tests on rock-like specimens with various configurations of two parallel cracks, integrating digital image correlation technology (DIC). They observed that the bridge angle significantly influences the crack propagation pathway and the strength of the rock [9,10]. These empirical studies have established a solid rock mechanics foundation for elucidating the disaster evolution mechanism in rock slopes.…”

Section: Introductionmentioning

confidence: 97%

Numerical research method of rock slope with intermittent fractures based on parallel bond contact model

Yang,

Zhao,

Xing

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Within the domain of rock slopes characterized by intermittent fracturing, the fracture distribution and the mechanical properties of the interstitial rock bridges significantly influence the stability of the slope. The parallel bond contact model is advantageous in replicating the mechanical behavior of rock particles. This research introduces a numerical methodology for analyzing rock slopes with intermittent fractures using the parallel bond contact model. Initially, the model’s microscale parameters are refined through calibration with empirical data derived from macroscopic mechanical tests on rocks. Following this, the discrete element modeling software is employed to construct a detailed rock slope model. This model incorporates a smooth joint approach to define the intermittent fractures, enabling the creation of slope models with varying configurations of coplanar rock bridges and diverse rock types. The research methodologically investigates the mechanical properties and failure patterns of rock slopes under a spectrum of variable combinations. The findings reveal that slopes with multiple rock bridges demonstrate progressive failure and interlocking phenomena during their load-deformation cycles. These insights provide a foundational understanding for the analysis of catastrophic mechanisms and the stability assessment of rock slopes.

show abstract

Section: Introductionmentioning

confidence: 97%

Numerical research method of rock slope with intermittent fractures based on parallel bond contact model

Yang,

Zhao,

Xing

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…To date there have been many numerical and experimental studies on the influence of single or multiple flaws, pores and joints localised at the macroscale level on the mechanical behaviour of isotropic rocks loaded under either uniaxial or triaxial conditions (Mondal et al 2019(Mondal et al , 2020aGriffiths et al 2017;Wasantha et al 2021;Tang and Kou 1998;Xue et al 2021;Xu et al 2013). We extend this analysis to consider the influence of bedding planes of initially transverse isotropic rocks and its orientation with respect to the uniaxial stress applied.…”

Section: Introductionmentioning

confidence: 99%

Impact of Stress-Induced Rock Damage on Elastic Symmetry: From Transverse Isotropy to Orthotropy

2022

View full text Add to dashboard Cite

In this article we explore the change in elastic symmetry and anisotropy of two geological materials with stress-induced damage. Two independent uniaxial deformation experiments on two layered and natural geomaterials, a shale and a sandstone, support this analysis. Both samples were loaded along their bedding planes at a constant strain rate up to mechanical failure. During deformation, an array of ultrasonic P- and S-wave transducers were employed to monitor the evolution of the ultrasonic velocities up to and beyond sample failure. We report here the impact on elastic symmetry and anisotropy of a uniaxial load applied parallel to the bedding plane of the transversely isotropic shale and sandstone samples. Based on symmetry considerations we analyse whether this load and the resulting stress-induced damage preserve the original transverse isotropy of the rock prior to loading, or lead to orthotropy (orthorhombic symmetry). Our results show that the two transverse isotropic samples retained their transverse isotropy in the initial stages of loading/damage. However for the more anisotropic shale sample the main failure mode was splitting of the bedding planes. In contrast the sandstone sample failed along a shear plane inclined to the bedding plane. In addition, the experimental data are further analysed using continuum damage mechanics to identify the evolution of the general fourth order anisotropic damage tensor during loading. We found that the highest damage variable of the damage tensor was $$D_{11}$$ D 11 for the shale and $$D_{55}$$ D 55 for the sandstone sample. The next highest damage variables for the shale sample were related to the bedding plane ($$x_2$$ x 2 –$$x_3$$ x 3 plane) symmetry: $$D_{23}, D_{32}, D_{44}$$ D 23 , D 32 , D 44 . However the damage variables obtained for the less anisotropic and more brittle sandstone sample were harder to interpret due to the mixed mode of fracturing present.

show abstract

“…In particular, coal mines in the eastern and northeast regions are generally affected by complex geological conditions, and the fault structure is one of the most common geological structures in the process of coal mine production. The wide distribution of fault structures has a significant impact on the distribution of abutment stress (Xue et al, 2021;Li et al, 2022;Si et al, 2022) and the characteristics of overburden movement (Wang et al, 2018;Wang et al, 2019). Lai et al (2016) studied the influence range of dynamic pressure during mining in fault fracture areas through the field monitoring method.…”

Section: Introductionmentioning

confidence: 99%

Study on the dynamic response and the hazard of rock burst under the influence of fault slip

Kong

Liu²,

Xing³

et al. 2023

Front. Earth Sci.

View full text Add to dashboard Cite

In the process of coal mine production, rock burst accidents near faults occur frequently. In order to further reveal the induced mechanism of fault slip rock burst, a numerical simulation method for dynamic calculation of fault slip under the influence of mining is proposed, and the law of fault slip and dynamic response characteristics of the stope are studied. The study shows that with the working face getting closer to the fault, the fault activity and the number of high-energy microseismic events increase significantly, and the fault slip dynamic load has a significant impact on the vibration velocity and abutment stress of coal and rock mass near the stope. Under the effect of a strong fault slip dynamic load, the coal and rock mass in the area with peak abutment stress undergo plastic failure and release a large amount of energy, and the potential of fault slip rock burst is high. The evaluation index Icd of rock burst hazard under fault slip dynamic load is proposed, and the rock burst hazard of working face passing through the fault is analyzed. The research results provide a theoretical basis for further revealing the induced mechanism and hazard assessment of fault slip rock bursts.

show abstract

Full-field quantification of time-dependent and -independent deformation and fracturing of double-notch flawed rock using digital image correlation

Cited by 20 publications

References 58 publications

Numerical research method of rock slope with intermittent fractures based on parallel bond contact model

Numerical research method of rock slope with intermittent fractures based on parallel bond contact model

Impact of Stress-Induced Rock Damage on Elastic Symmetry: From Transverse Isotropy to Orthotropy

Study on the dynamic response and the hazard of rock burst under the influence of fault slip

Contact Info

Product

Resources

About