Digital representation of meso-geomaterial spatial distribution and associated numerical analysis of geomechanics: methods, applications and developments

Yue, Z.Q.

doi:10.1007/s11709-007-0008-0

Cited by 8 publications

(9 citation statements)

References 20 publications

(40 reference statements)

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“…The microstructures of above four type rocks were obtained by SEM, as shown in Figure 2. In order to describe the inhomogeneity quantitatively, digital image processing (DIP) has been used [25,26]. The procedure is first to make the feature extraction from rock profile in digital.…”

Section: Resultsmentioning

confidence: 99%

Rock Mechanical Property Influenced by Inhomogeneity

Tan

Huang

Zhang

2012

Advances in Materials Science and Engineering

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In order to identify the microstructure inhomogeneity influence on rock mechanical property, SEM scanning test and fractal dimension estimation were adopted. The investigations showed that the self-similarity of rock microstructure markedly changes with the scanned microscale. Different rocks behave in different fractal dimension variation patterns with the scanned magnification, so it is conditional to adopt fractal dimension to describe rock material. Grey diabase and black diabase have high suitability; red sandstone has low suitability. The suitability of fractal-dimension-describing method for rocks depends on both investigating scale and rock type. The homogeneities of grey diabase, black diabase, grey sandstone, and red sandstone are 7.8, 5.7, 4.4, and 3.4, separately; their average fractal dimensions of microstructure are 2.06, 2.03, 1.72, and 1.40 correspondingly, so the homogeneity is well consistent with fractal dimension. For rock material, the stronger brittleness is, the less profile fractal dimension is. In a sense, brittleness is an image of rock inhomogeneity in macroscale, while profile fractal dimension is an image of rock inhomogeneity in microscale. To combine the test of brittleness with the estimation of fractal dimension with condition will be an effective approach for understanding rock failure mechanism, patterns, and behaviours.

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Section: Resultsmentioning

confidence: 99%

Rock Mechanical Property Influenced by Inhomogeneity

Tan

Huang

Zhang

2012

Advances in Materials Science and Engineering

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“…Due to the high block proportions, the physical and mechanical properties of the geological material can be rather different and heterogeneous, which may cause challenging problems for tunnel excavation, dam construction, and slope engineering. Thus, determination of the strength and elastic modulus of such geological materials is fundamental and crucial to guarantee the safety and stability of the aforementioned projects [4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Predicting the Mechanical Properties of Bimrocks with High Rock Block Proportions Based on Resonance Testing Technology and Damage Theory

et al. 2019

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Block-in-matrix-rocks (bimrocks) are very complicated geological masses that cause many challenging problems during the design and construction of engineering projects, such as parameter determination and landsliding. Successful engineering design and construction depends on a suitable constitutive model and reliable design parameters for geological masses. In this paper, the vibration attenuation signal of welded bimrocks was obtained and studied using resonance test technology. Combined with a uniaxial compression test, a constitutive model was proposed to describe the mechanical behavior of welded bimrocks. On this basis, the relations between the dynamic elastic modulus and the physical parameters of bimrocks were established, which included macroscopic mechanical parameters and damage constitutive parameters. Consequently, a new technological process was proposed to provide quick identification of the mechanical properties of welded bimrocks. The results indicate that the dynamic elastic modulus is highly correlated with the rock block proportion (RBP) and uniaxial compression strength (UCS). It is an effective parameter to predict the strength of the bimrocks with high RBPs. Additionally, the proposed constitutive model, which is based on damage theory, can accurately simulate the strain softening behavior of the bimrocks. Combining the resonant frequency technology and the proposed constitutive model, the complete stress strain curve can be obtained in a rapid and accurate manner, which provides a further guarantee of the stability and safety of underground engineering.

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“…Some scholars improved the DICM based on rock-like material tests in small scales [29][30][31][32][33]. Chen et al [29] presented a two-dimensional digital image based on the numerical modeling method for heterogeneous geomaterials.…”

Section: Introductionmentioning

confidence: 99%

“…Chen et al [29] presented a two-dimensional digital image based on the numerical modeling method for heterogeneous geomaterials. Yue [30] presented that the digital image processing method could be used as a measurement tool to construct a digital representation for the actual spatial distribution of the different materials and components in geomaterial samples, which was further proceeded to automatically generate meshes or grids for numerical analysis. Bornert et al [31] studied deformation and failure of clay rock under different humidity and discussed various error regimes, including the dependence of the uncertainty with the parameters of the algorithms.…”

Section: Introductionmentioning

confidence: 99%

Application of DICM on Similar Material Simulation Experiment for Rock-Like Materials

Kong

Wang

et al. 2018

Advances in Civil Engineering

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e digital image correlation method (DICM) has been applied to similar material simulation experiments for rock-like materials, to overcome the weakness of traditional measurements, for example, data discontinuous. In this paper, the movement and fracturing process of the overlying strata during excavation are observed and studied, and the distributions of stress, strain, and deformation in the overlying strata are obtained based on similar material simulation. e DICM is applied to improve the testing method and to optimize the discontinuity of testing points; of course, the difference of rock deformation in the overlying strata during excavation is considered. Full-field deformation and strain are analyzed by the DICM. To verify the accuracy of the DICM, results obtained from the DICM, numerical simulation and similar material simulation, are compared. e DICM can reflect the characteristics of locality and randomness of rock-like materials more real than numerical simulation, and comparing with similar material simulation, it can directly reproduce the movement and fracturing process of the overlying strata during full-field excavation. It shows that, the DICM is entirely feasible to using in the large scale full-field deformation measurement on complex rock structure, and it is of theoretical importance for testing for rock-like materials.

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Digital representation of meso-geomaterial spatial distribution and associated numerical analysis of geomechanics: methods, applications and developments

Cited by 8 publications

References 20 publications

Rock Mechanical Property Influenced by Inhomogeneity

Rock Mechanical Property Influenced by Inhomogeneity

Predicting the Mechanical Properties of Bimrocks with High Rock Block Proportions Based on Resonance Testing Technology and Damage Theory

Application of DICM on Similar Material Simulation Experiment for Rock-Like Materials

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