Behavior of Marble under Compression

Chang, Chein‐Chi; Monteiro, Paulo J.M.; Nemati, Kamran M.; Shyu, K. L.

doi:10.1061/(asce)0899-1561(1996)8:3(157)

Cited by 14 publications

(11 citation statements)

References 9 publications

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“…However, in cases where the displacement inside the block is high and cannot be ignored, the blocks can be divided by mesh. An example of this approach is the research by Chang et al [26] and also Jing [27] who resolved this problem by adding finite element meshes in the two-dimensional domain of the blocks so that stress variations within the blocks can be allowed. Higher order DDA method for two-dimensional problems has been developed in both theory and computer codes by researchers like Koo and Chern [28], Ma et al [29] and Hsiung [30].…”

Section: Dda Formulationmentioning

confidence: 98%

“…The DDA contact model which was originally based on penalty method was improved by adopting the Lagrange type approach reported by Lin et al [24]. Since a blocky system is a high non-linear system due to non-linearity within blocks and between blocks, Chang et al [26] implemented a material non-linearity model to DDA using strain hardening curves. Ma [31] developed a non-linear contact model for analysis of slope progressive failure including strain softening using the stress and strain curve.…”

Section: Dda Formulationmentioning

confidence: 99%

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A model for cable bolt-rock mass interaction: Integration with discontinuous deformation analysis (DDA) algorithm

Moosavi

Grayeli

2006

International Journal of Rock Mechanics and Mining Sciences

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Section: Dda Formulationmentioning

confidence: 98%

Section: Dda Formulationmentioning

confidence: 99%

A model for cable bolt-rock mass interaction: Integration with discontinuous deformation analysis (DDA) algorithm

Moosavi

Grayeli

2006

International Journal of Rock Mechanics and Mining Sciences

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“…The integral of R R T iðrÞ Â Ã T T iðsÞ Â Ã dxdy was calculated using the simplex method outlined by Shi [16].…”

Section: Force Of Inertiamentioning

confidence: 99%

“…Some researchers [16,17] implemented finite element mesh into the original DDA blocks in order to account for stress variations within the blocks. Moreover, Shi's recent development, the manifold method, was aimed at describing stress distributions within blocks [18].…”

Section: Introductionmentioning

confidence: 99%

Discontinuous deformation analysis with second-order finite element meshed block

Grayeli¹,

Mortazavi

2006

Int. J. Numer. Anal. Meth. Geomech.

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SUMMARYThe discontinuous deformation analysis (DDA) with second-order displacement functions was derived based on six-node triangular mesh in order to satisfy the requirement for the accurate calculations in practical applications. The matrices of equilibrium equations for the second-order DDA were given in detail for program coding. By close comparison with widely used finite element method and closed form solutions, the advantages of the modified DDA were illustrated. The program coding was carried out in C+ + environment and the new code applied to three examples with known analytical solutions. A very good agreement was achieved between the analytical and numerical results produced by the modified DDA code.

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“…Chang et al, 1996;Perazzelli et al, 2009). Table 5 shows the potential failures identified through kinematic stability analysis (examples are shown in Fig.…”

Section: Rock Slope Engineering Geological Characterizationmentioning

confidence: 99%

Use of a remotely piloted aircraft system for hazard assessment in a rocky mining area (Lucca, Italy)

Salvini

Mastrorocco

Esposito

et al. 2018

Nat. Hazards Earth Syst. Sci.

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Abstract. The use of remote sensing techniques is now common practice in different working environments, including engineering geology. Moreover, in recent years the development of structure from motion (SfM) methods, together with rapid technological improvement, has allowed the widespread use of cost-effective remotely piloted aircraft systems (RPAS) for acquiring detailed and accurate geometrical information even in evolving environments, such as mining contexts. Indeed, the acquisition of remotely sensed data from hazardous areas provides accurate 3-D models and high-resolution orthophotos minimizing the risk for operators. The quality and quantity of the data obtainable from RPAS surveys can then be used for inspection of mining areas, audit of mining design, rock mass characterizations, stability analysis investigations and monitoring activities. Despite the widespread use of RPAS, its potential and limitations still have to be fully understood.In this paper a case study is shown where a RPAS was used for the engineering geological investigation of a closed marble mine area in Italy; direct ground-based techniques could not be applied for safety reasons. In view of the re-activation of mining operations, high-resolution images taken from different positions and heights were acquired and processed using SfM techniques to obtain an accurate and detailed 3-D model of the area. The geometrical and radiometrical information was subsequently used for a deterministic rock mass characterization, which led to the identification of two large marble blocks that pose a potential significant hazard issue for the future workforce. A preliminary stability analysis, with a focus on investigating the contribution of potential rock bridges, was then performed in order to demonstrate the potential use of RPAS information in engineering geological contexts for geohazard identification, awareness and reduction.

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Behavior of Marble under Compression

Cited by 14 publications

References 9 publications

A model for cable bolt-rock mass interaction: Integration with discontinuous deformation analysis (DDA) algorithm

A model for cable bolt-rock mass interaction: Integration with discontinuous deformation analysis (DDA) algorithm

Discontinuous deformation analysis with second-order finite element meshed block

Use of a remotely piloted aircraft system for hazard assessment in a rocky mining area (Lucca, Italy)

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