Rock slope stability analysis using photogrammetric data and DFN–DEM modelling

Bonilla-Sierra, V.; Scholtès, Luc; Donzé, Frédéric‐Victor; Elmouttie, Marc

doi:10.1007/s11440-015-0374-z

Cited by 78 publications

(36 citation statements)

References 23 publications

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“…DEM models are created using Yade [48] with frictional, spherical discrete elements. Yade is an open source DEM code that has extensive application for the modeling of a variety of problems [49][50][51][52]. The results that are obtained from the models are post-processed using Paraview [53] and Gnuplot [54].…”

Section: Initial Dem Model Setupmentioning

confidence: 99%

Numerical Investigation of Caved Rock Mass Friction and Fragmentation Change Influence on Gravity Flow Formation in Sublevel Caving

Lapčević

Torbica

2017

Minerals

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Abstract:Metal grade dilution is the main production disadvantage of the sublevel caving method, and overcoming this problem has been investigated over the years using different methodologies. Herein, numerical simulation using the discrete element method is used to analyze the influence of friction and fragmentation change in caved rock mass on ore dilution and recovery. The individual and mutual change of each parameter is analyzed. It is considered that at the beginning, the friction angle can be lower or higher than the basic friction angle, and after a certain moment, it will come close to the basic friction value, while fragmentation always decreases. The results showed that both friction and fragmentation, when decreasing, are influencing the higher dilution due to smaller kinematic resistance in the caved mass. If lower friction than the basic one is considered, with the drop of fragmentation, the decrease of dilution occurs. Once the basic friction angle is reached, the fragmentation of the caved mass becomes the dominant influencing factor, and its decrease will continuously increase the dilution until the end of production. However, identifying periods when these changes occur, the possibility for better production planning opens at the design stage, as well as the application of different sublevel designs.

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Section: Initial Dem Model Setupmentioning

confidence: 99%

Numerical Investigation of Caved Rock Mass Friction and Fragmentation Change Influence on Gravity Flow Formation in Sublevel Caving

Lapčević

Torbica

2017

Minerals

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“…The joints are simulated by slip surfaces located between the particles laying on the opposite side of the joint surface (see 9,18,19,20,26 for details). The SJM formulation provides a direct equivalence between the properties of the macroscopic discontinuity and the properties of the inter-particle bonds crossing this discontinuity.…”

Section: Discrete Element Methodsmentioning

confidence: 99%

“…9 The discontinuities, or so-called joints, were chosen to have no cohesion with a friction angle of 20°. Once the properties were set up, the particles were packed inside the closed trapezoidal prism following the procedure described in 26 and illustrated in Fig. 9.…”

Section: Discrete Element Methodsmentioning

confidence: 99%

“…Although being an oversimplification of the actual weathering process taking place in nature, the method presents the advantage of keeping the same shape for the failure envelope of the rock material during the degradation process, ensuring therefore a realistic behaviour. 26 The TSSR method is controlled through the introduction of a TSSR factor, which is applied iteratively to the initial bond strength, until failure occurs. The final TSSR factor indicates how much the initial strength needs to be reduced to reach the instability, and it is defined as follows:…”

Section: Slope Stability Analysis Using a Tensile And Shear Strength mentioning

confidence: 99%

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DEM analysis of rock bridges and the contribution to rock slope stability in the case of translational sliding failures

Bonilla-Sierra

Scholtès

Donzé

et al. 2015

International Journal of Rock Mechanics and Mining Sciences

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“…The term 'least difficult' is appropriate since credible representation of discontinuous rock mass is not an easy task due to many ambiguities linked with its unpredictable nature. However, much advance has been made in field of DEM modelling for rock slope stability analysis, by implementing novel techniques such as photogrammetry and 3D mapping system (Bonilla-Sierra et al 2015) or different types of laser scanning (Sturzeneger et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Calibration of Rock Cutting Numerical Model based on Monitoring Data

Pavlić¹,

Bačić²,

Kovačević³

2019

JSM

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Prediction of the deformation increment and the final displacement of the rock cutting is a challenging task. Many ambiguities linked with unpredictable nature or rock mass make it difficult to apply the adequate contingency measures. Implementation of common approach, which includes modelling of discontinuity effects with estimated reduction of rock mass strength and modulus of elasticity, usually does not yield satisfactory results. Therefore, a calibration of FEM based numerical model was made by conducting parametric analysis which feeds upon data obtained from extensive on-site monitoring system. A step forward was made in description of numerical parameters of karst discontinuities through consideration of monitoring results, as well as excavation procedures, position, inclination and length of discontinuities and PDC (project design change). ABSTRAKRamalan kenaikan canggaan dan sesaran akhir pemotongan batu adalah satu tugas yang mencabar. Banyak kesamaran yang dikaitkan dengan sifat yang tidak dapat diramalkan atau jisim batu menyukarkan untuk menggunakan langkah kontingensi yang mencukupi. Pelaksanaan pendekatan biasa yang merangkumi pemodelan kesan ketakselanjaran dengan anggaran pengurangan kekuatan jisim batu dan modulus keanjalan, kebiasaannya tidak memberikan keputusan yang memuaskan. Oleh itu, penentukuran model berangka FEM dibuat dengan menjalankan analisis parametrik yang menggunakan data yang diperoleh daripada sistem pemantauan ekstensif di tapak. Satu penambahbaikan telah dibuat dalam penerangan parameter berangka ketakselanjaran karst dengan mempertimbangkan keputusan pemantauan serta prosedur pengorekan, kedudukan, kecenderungan dan panjang ketakselanjaran dan PDC (perubahan reka bentuk projek). Kata kunci: Jisim batu; kaedah pemerapan; karst; ketakselanjaran; pemodelan berangka Vedran Pavlic Hidroinzenjering d.o.o. Okucanska 30, 10 000 Zagreb Croatia

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Rock slope stability analysis using photogrammetric data and DFN–DEM modelling

Cited by 78 publications

References 23 publications

Numerical Investigation of Caved Rock Mass Friction and Fragmentation Change Influence on Gravity Flow Formation in Sublevel Caving

Numerical Investigation of Caved Rock Mass Friction and Fragmentation Change Influence on Gravity Flow Formation in Sublevel Caving

DEM analysis of rock bridges and the contribution to rock slope stability in the case of translational sliding failures

Calibration of Rock Cutting Numerical Model based on Monitoring Data

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