A damage mechanical model applied to analysis of mechanical properties of jointed rock masses

Yang, Wendong; Zhang, Qianbing; Ranjith, P.G.; Yu, Rangang; Luo, Guangyu; Huang, Chenchen; Wang, Gang

doi:10.1016/j.tust.2018.11.004

Cited by 45 publications

(18 citation statements)

References 39 publications

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“…Due to the difficulty and high cost of prefabricating joints on real geotechnical materials [36][37][38][39][40][41], many scholars have chosen the method of testing a similar material model to investigate the effect of joints on the mechanical strength characteristics of the rock. In this paper, the rock-like material cement mortar was selected to produce the specimen.…”

Section: Specimen Materials and Specimen Preparationmentioning

confidence: 99%

Effect of Cyclic Freezing-Thawing on the Shear Mechanical Characteristics of Nonpersistent Joints

Lei

Lin

Chen

et al. 2019

Advances in Materials Science and Engineering

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The effects of freezing-thawing cycles and persistency differences have a significant impact on the shear mechanical properties of joints. In this paper, a series of joints direct shear tests were performed on freezing-thawing treated joints to investigate the effect of freezing-thawing cycles and the persistency on the shear strength deterioration of joints. Shear strength and residual strength decrease with the freezing-thawing cycle increase and joint persistency increase. Shear strength damage mainly generates in the initial stage of the freezing-thawing cycle, and the shear strength decreases slightly in the late freezing-thawing cycle stage. The freeze-thaw cycle has a minimal effect on the shear strength of joints with low persistency, yet has a great effect on joints with high persistency. The damage of joint roughness caused by freezing-thawing cycles increases with joint persistency increases. When the joint persistency is constant, the shear strength parameter decreases with the freezing-thawing cycle at first and then tends to be stable. Cohesion is the dominant factor that controls shear strength. When freezing-thawing cycles are constant, the friction angle decreases slowly with persistency at first and then decreases rapidly, and the friction angle is the dominant factor that controls shear strength.

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Section: Specimen Materials and Specimen Preparationmentioning

confidence: 99%

Effect of Cyclic Freezing-Thawing on the Shear Mechanical Characteristics of Nonpersistent Joints

Lei

Lin

Chen

et al. 2019

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

show abstract

“…27 In this study, we extend the model into a damage rheological model for jointed rock masses and further developed this model in FLAC 3D software. 27 In this study, we extend the model into a damage rheological model for jointed rock masses and further developed this model in FLAC 3D software.…”

Section: Yang Et Almentioning

confidence: 99%

“…Equation (9) can be simplified and expressed as where The net stress is then given by 27 Connection between the kinematic field of a damaged body with the net stress can be built by the formation of a constitutive relation where Φ is the function of the constitutive equation, which will be introduced in section 3. ε is the total strain.…”

Section: Net Stressmentioning

confidence: 99%

“…In our recent study, we have developed a geometric damage model in FLAC 3D which could reflect the influence of joint density and joint direction. 27 In this study, we extend the model into a damage rheological model for jointed rock masses and further developed this model in FLAC 3D software. We present the method of geometric damage mechanics, and the practical procedure for the long-term behavior of an underground opening.…”

Section: Yang Et Almentioning

confidence: 99%

“…We define the damage zones as follows 27 : A shear damage zone will be defined in the numerical calculation, if the value of shear strain of an element exceeds the threshold of the shear strain.…”

Section: Net Stressmentioning

confidence: 99%

See 2 more Smart Citations

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

Self Cite

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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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Research on the failure process and stability control technology in a deep roadway: Numerical simulation and field test

Zang

Chen

Zhang

et al. 2020

Energy Science & Engineering

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With the increase in mining depth and the deterioration of surrounding rock conditions, large deformation failure of deep roadway surrounding rock is still very common. To solve the support problem, it is necessary to understand the deformation and failure mechanism of the deep roadway. This paper presents a case study on the deformation failure behavior and support design of a deep roadway in the Tangyang mine by field tests and numerical simulations. The rock mass properties were first evaluated based on field data and the mechanical parameters of rock specimens. Then, the numerical model of the deep roadway surrounding rock was established based on the calibrated microparameters. The deformation features and cracking behavior of the roadway were investigated in detail. The results show that the cracking process of crack initiation, crack propagation, and rock separation in the surrounding rock of this kind of roadway is a gradual process developing from a shallow to deep depth. A combined support “bolt‐cable‐mesh‐steel ladder” was proposed based on the failure characteristics of the roadway. Finally, a numerical simulation and field experiment were conducted to evaluate the rationality of the proposed support scheme, and the results show that the new support method can effectively control the surrounding rock. This study can provide valuable references for support design in deep underground engineering.

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A damage mechanical model applied to analysis of mechanical properties of jointed rock masses

Cited by 45 publications

References 39 publications

Effect of Cyclic Freezing-Thawing on the Shear Mechanical Characteristics of Nonpersistent Joints

Effect of Cyclic Freezing-Thawing on the Shear Mechanical Characteristics of Nonpersistent Joints

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

Research on the failure process and stability control technology in a deep roadway: Numerical simulation and field test

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