Micromechanical modeling of dynamic compressive responses of mesoscopic heterogenous brittle rock

Zhou, Xiaoping; Yang, Haiqing

doi:10.1016/j.tafmec.2007.04.008

Cited by 89 publications

(27 citation statements)

References 19 publications

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“…By introducing the expression formula among the effective bulk modulus and Poisson's ratio with the microcrack density [1] and the calculation formula of roc fragmentation size [2], Taylor et al [3] built the relationship between the microcrack density and damage variable, and established the famous Taylor-Chen-Kuszmaul (TCK) model by coupling the rate of the damage variable into the dynamic constitutive equation. Thereafter, many damage constitutive models have been proposed based on the mesoscopic dynamic fracture mechanism of the rock [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

A dynamic damage constitutive model for a rock mass with persistent joints

Liu

Zhang

et al. 2015

International Journal of Rock Mechanics and Mining Sciences

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Section: Introductionmentioning

confidence: 99%

A dynamic damage constitutive model for a rock mass with persistent joints

Liu

Zhang

et al. 2015

International Journal of Rock Mechanics and Mining Sciences

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“…As aforementioned, the constitutive law for a rock mass is given in the form of Equation (14), while, if the material has no damage in the body, the net stress ̃ in Equation (14) is regarded simply as the Cauchy stress .…”

Section: Net Stressmentioning

confidence: 99%

Development of a damage rheological model and its application in the analysis of mechanical properties of jointed rock masses

Yang

Luo

Kang

et al. 2019

Energy Science & Engineering

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Fossil fuel resources (eg, coal, oil, and natural gas) exist in underground reservoirs, where discontinuities are widespread and influence the stability of rock structures. The mechanical behavior of jointed rock masses significantly affects the long‐term stability of rock engineering. A major challenge in this area is to link the time‐dependent deformation with damage influence induced by distribution of joints in rock masses. In this paper, a damage mechanical theory is adopted which deals with several groups of joints distributed in rock masses. Based on the geometrical distribution of joints, a damage model considering the influence of normal vector and area density of joints is used to describe the discontinuities. A damage rheological model for jointed rock masses is developed and programmed in the finite difference software FLAC3D, and an example of jointed rock masses is used to verify the validity of the model. The damage rheological model could predict the visco‐elastic strain which corresponds to primary creep property, visco‐plastic strain which corresponds to steady state creep property, and damage strain which reflects the damage effect of joints to rock masses. Finally, we use this model to predict the displacements and damage zones in the rock masses surrounding an underground opening.

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“…The strength criterion of the deep rock mass can be used to analyze tensile failure, dilative shear failure and shear contraction failure of the deep rock mass [7,8]. The strength criterion of the deep rock mass is used to research the zonal disintegration phenomenon of the deep rock masses.…”

Section: A New Strength Criterion For Deep Rock Massmentioning

confidence: 99%

Mechanism of zonal disintegration in surrounding rock mass around deep rock engineering and its application

Zhang

2011

Sci. China Technol. Sci.

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The mechanical behaviors of deep rock mass are different from those of shallow rock mass. Through cases of Jinping II Hydropower Station, the special phenomenon of zonal disintegration in the surrounding rock mass around the diversion tunnels, is analyzed. On the basis of fracture mechanics, a new strength criterion for deep rock mass is derived. The new nonlinear strength criterion that is relative to the rock mass rating classification can be applied to the study of the tensile failure of deep rock mass. Subsequently, zonal disintegration model is established, and the radius of fractured zone and none-fractured zone of deep surrounding rock mass around cylindrical tunnel are obtained, their exact positions and the evolution law of zonal disintegration of surrounding rock mass is determined. To validate the present model, comparison between calculation results and the experiment observation on facture and failure around underground openings is carried out. It is found that the numerical simulation result is in good agreement with the experimental one on failure modes around the hole. Through sensitivity analysis, the effects of stress condition, cohesion and the angle of internal friction on the phenomenon of zonal disintegration are determined. Finally, the present model is adopted in the analysis of the zonal disintegration in the surrounding rock mass around the diversion tunnels in Jinping II Hydropower Station. Meanwhile, the magnitude and distributions of fractured zones are determined by numerical simulation. deep rock mass, zonal disintegration, strength criteria of deep rock mass, numerical simulation Citation:Zhang Y X, Zhang B H. Mechanism of zonal disintegration in surrounding rock mass around deep rock engineering and its application.

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Micromechanical modeling of dynamic compressive responses of mesoscopic heterogenous brittle rock

Cited by 89 publications

References 19 publications

A dynamic damage constitutive model for a rock mass with persistent joints

A dynamic damage constitutive model for a rock mass with persistent joints

Development of a damage rheological model and its application in the analysis of mechanical properties of jointed rock masses

Mechanism of zonal disintegration in surrounding rock mass around deep rock engineering and its application

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