The spherical primitive and perlin noise method to recreate realistic aggregate shapes

Michot-Roberto, S.; Hernandez, Álvaro García; Dopazo-Hilario, S.; Dawson, Andrew

doi:10.1007/s10035-021-01105-6

Cited by 9 publications

(3 citation statements)

References 32 publications

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“…The numerical methods offer the advantage of being able to study problems and variables that are sometimes difficult to observe and control in physical or full-scale studies. As an example, with distinct element method (DEM) we can study stress chain and inter-particle interaction, modified material properties (such as: density, elastic modules, friction parameters), and nowadays realistic rock fragment shapes can be used (ESSS 2022;Michot-Roberto et al 2021). Large-scale simulations have been developed in DEM using spherical particles (Hancock 2013;Pierce et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Physical modelling as a tool to improve our understanding of mechanisms of cave flow

Castro¹,

Gómez²,

Pérez³

2022

Caving 2022: Fifth International Conference on Block and Sublevel Caving

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In block caving, gravity flow of broken ore has been studied using different tools, highlighting the application of scaled physical models, numerical modelling and field studies. These tools, with their advantages and disadvantages, have allowed different variables involved during ore draw to be studied. In this paper, we summarise years of physical experiments run in the Block Caving Laboratory to study different underground mining issues. In particular, experiments have been carried out to study fine material migration, induced stresses due to ore draw, secondary fragmentation, hang-ups formed on drawpoints, drawbell geometries, inrush of fines material, and ore extraction in mud conditions. The main significances, its impact and application, are discussed here. This work shows that physical modelling continues to be a powerful and useful tool to study gravity flow in block cave mines, allowing to understand diverse mine engineering problems and to be a practical input to calibrate complex numerical models.

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Section: Introductionmentioning

confidence: 99%

Physical modelling as a tool to improve our understanding of mechanisms of cave flow

Castro¹,

Gómez²,

Pérez³

2022

Caving 2022: Fifth International Conference on Block and Sublevel Caving

View full text Add to dashboard Cite

show abstract

“…Persson [ 43 ] pointed out that the image analyses of rock aggregates are particularly practicable for fine aggregates because the use of traditional testing methods that measure the size and shape of the fine grains does not seem to be effective. In some cases, the imaging method seems to be ineffective due to the adoption of unnatural grain shapes, which can affect the geometric results [ 44 ]. Notwithstanding that image analyzing techniques are a new way of determining the size and shape properties of mineral aggregates, the traditional testing methods to determine the shape properties of rock aggregates seem to be more effective for coarse aggregates because they provide more precise data [ 39 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Basalt Aggregate Crushing Technology on Its Geometrical Properties—Preliminary Studies

et al. 2023

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The use of mineral aggregates is related to the increasing demand in construction, railway and road infrastructures. However, mineral aggregates can appear to be of variable quality, directly affecting their suitability for respective earthwork applications. Since the production of mineral aggregates should ensure the standardized, high-quality requirements of the final product, rock-crushing mechanisms should be investigated in a detailed manner. In this context, the aim of the present study is to evaluate and analyze the geometric parameters of basalt aggregates as a result of several rock comminution processes. Basalt aggregates from two deposits in Poland were used in the study. The samples are differentiated regarding both lithological variances, mineral composition as well as the host rock’s tuff content. The rock comminution processes were conducted using two types of crushers, namely the laboratory-scale jaw and cone crushers. The feed for crushing was designed based on the original geometric grain composition and the separated feed in the form of flaky and non-flaky particles. The crushability test results demonstrated that the interparticle compression in the jaw crusher resulted in finer products compared to the one in the cone crusher. It was also observed that the flakiness and shape indexes decreased after crushing, both in the feed with the original geometric composition of the grains and those with flaky and non-flaky particles. Nevertheless, a higher flakiness index was obtained after the crushing of non-flaky particles and a lower one after the crushing of flaky particles. The flakiness index for grains below 16 mm after the crushing process was less than 10%, which indicates a more favorable result compared to the original feed. In addition, it was shown that flaky and non-cubical particles were accumulated in the finest (below 8 mm) and coarsest (above 20 mm) fractions in jaw and cone crushing processes, receiving flakiness and shape indexes ranging up to 80–100%. Finally, it was also observed that the lithological variances of the feed material have a significant impact on the particle size distribution of the product. More profoundly, basalt aggregates with a higher tuff content and weathering degree have a higher degree of crushing. The present study, in this context, provides accurate and satisfying information on understanding the crushing mechanisms of two important crushing equipment as well as their rock-crusher interactions.

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“…On the other hand, the discrete element method (DEM) has been employed due to its ability to model the physical behavior of particles with great precision and to control a large number of variables, including complex particles' shape [8] and interparticle friction [9]. Yu et al [10] developed an experimental model with a simulation using the DEM.…”

Section: Introductionmentioning

confidence: 99%

Segregation Modeling in Stockpile Using Discrete Element Method

et al. 2022

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During stockpile feeding, the small particles migrate to the center of the stock while large particles end up around the edges. This phenomenon influences how the mineral is fragmented in the subsequent stages of size reduction. In this study, the primary variables involved in this phenomenon were studied using the discrete element to simulate particle segregation. Results show that the ratio between coarse and fine particles strongly affects particle segregation. The segregation phenomenon was not observed when there were fewer coarse particles in the mix. The feeding height was also found to influence segregation and to affect the angles of repose and dumping. Finally, the rounded polyhedral shape of particles generated the simulation performance most similar to actual particle segregation based on a case study analyzed.

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The spherical primitive and perlin noise method to recreate realistic aggregate shapes

Cited by 9 publications

References 32 publications

Physical modelling as a tool to improve our understanding of mechanisms of cave flow

Physical modelling as a tool to improve our understanding of mechanisms of cave flow

Influence of Basalt Aggregate Crushing Technology on Its Geometrical Properties—Preliminary Studies

Segregation Modeling in Stockpile Using Discrete Element Method

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