Analysis of Progressive Failure Mechanism of Rock Slope with Locked Section Based on Energy Theory

Guo, Qiang; Pan, Jiliang; Cai, Meifeng; Zhang, Ying

doi:10.3390/en13051128

Cited by 14 publications

(14 citation statements)

References 38 publications

(58 reference statements)

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“…e deformation and fracture of rocks are complex processes with energy evolution between rocks and the external environment. e monitoring and prediction of the impending progressive failure is of great significance to ensure the stability of the rock structures and the safety of the workers [19].…”

Section: Experimental Data Identification and Verificationmentioning

confidence: 99%

Modified Time-Varying Damage Model with Caputo Fractional Derivative on the Creep Destruction Prediction of Rock Slope

Zhen

2021

Mathematical Problems in Engineering

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Based on the consideration of the time effect and connecting with typical instances, the modified Caputo fractional time-varying damage model is proposed in this paper. The parameters of creep constitutive model of slope are determined by using the powerful mathematical software and the influence of the parameters of time varying viscus element and damage element, α and ξ , on strain are shown. As α increases, the strain rates of the first and second stages of creep attenuation and steady-state stages gradually decrease and the strain rate in the acceleration stage is reflected in ξ . The fitting curve is in good agreement with the experimental data, which proves that the damage model proposed in this paper is reasonable and accurate. It provides useful reference and guidance for further study of slope creep failure and practical applications.

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Section: Experimental Data Identification and Verificationmentioning

confidence: 99%

Modified Time-Varying Damage Model with Caputo Fractional Derivative on the Creep Destruction Prediction of Rock Slope

Zhen

2021

Mathematical Problems in Engineering

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“…The damage variable is used to study the damage of the rock mass. Currently, there are many parameters to define damage variables, such as cracks, the elastic coefficient, the yield stress, the density, and the AE characteristics (Aggelis., 2011;Kupchella et al, 2015;Murti et al, 1991;Liu et al, 2019b;Guo, Q., et al, 2020b). Therefore, this paper uses the number of AE events to define the damage variable.…”

Section: Tension Crackmentioning

confidence: 99%

Study on failure mechanical characteristics and damage constitutive model of sandstone with different numbers of holes

Peng

Liu

2020

Lat. Am. j. solids struct.

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The existence of holes in rock is one of the key factors for the instability of underground rock mass engineering. Combined with acoustic emission equipment, uniaxial compression tests of rock specimens with different numbers of holes in the rock were carried out. The results show that with the number of holes increases, the value of peak strength and elastic modulus of the rock decrease. The acoustic emission (AE) counts gone through stable, slow increase, a sudden increase and towards zero four stages and there are corresponding to the initial compaction stage, elastic stages, strain hardening stage and post-peak strain softening stage of the stress-strain curves approximately. Based on the AE events, damage variables of rocks were obtained. The damage evolution process of rock can also be divided into three parts, including stable damage stage, slowly increasing damage stage and sharply increasing damage stage. According to Duncan model, the damage variable is introduced to obtain the rock damage constitutive model. No matter it is the pre-peak initial compaction stage, the linear elasticity stage, the strain hardening stage or the post-peak strain softening stage, the fitting curves are in good agreement with the test curves. It also illustrates the rationality of the damage constitutive model.

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“…It is difficult for general strength theory and failure criterion to effectively reflect the strength characteristics and failure mechanism [27,28]. e failure of the engineering rock mass is actually a process of energy accumulation, transfer, and dissipation, and the transformation of energy is an essential feature of the material physical process [11,24,[29][30][31]. It has become a hot topic to study the instability and failure behavior of rock mass based on the energy theory.…”

Section: Introductionmentioning

confidence: 99%

Effect of Joint Density on Rockburst Proneness of the Elastic‐Brittle‐Plastic Rock Mass

Pan

Ren

Cai

2021

Shock and Vibration

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The prediction of rockburst proneness is the basis of preventing and controlling rockburst disasters in rock engineering. Based on energy theory and damage mechanics, the quantitative functional relationship between joint density and energy density was derived. Then, the theoretical results were verified by numerical simulation and uniaxial compression test, and the effect of joint density on rockburst proneness of the elastic-brittle-plastic rock mass was discussed. The results show that the relationship between the joint density and the dissipated energy index of the jointed rock mass is a logarithmic function. With the same total input energy, the higher the joint density, the more the damage dissipation energy. Even in the case of high joint density, the rock mass still has limited resistance to external failure. Under the same joint density, the strength of parallel jointed rock mass is better than that of the cross-jointed rock mass, and the parallel jointed rock mass can accumulate more elastic strain energy and has higher rockburst proneness. The joint density is closely related to the ability of the rock mass to store high strain energy. The higher the joint density is, the weaker the ability to accumulate the elastic strain energy of rock mass is and the lower the rockburst proneness is. It is helpful to predict rockburst proneness by investigating and studying the properties of geological discontinuities. The research results have some theoretical and engineering guiding significance for the prediction of rockburst proneness of the jointed rock mass.

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Analysis of Progressive Failure Mechanism of Rock Slope with Locked Section Based on Energy Theory

Cited by 14 publications

References 38 publications

Modified Time-Varying Damage Model with Caputo Fractional Derivative on the Creep Destruction Prediction of Rock Slope

Modified Time-Varying Damage Model with Caputo Fractional Derivative on the Creep Destruction Prediction of Rock Slope

Study on failure mechanical characteristics and damage constitutive model of sandstone with different numbers of holes

Effect of Joint Density on Rockburst Proneness of the Elastic‐Brittle‐Plastic Rock Mass

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