Documents published in Scipedia

• Parameter selection and experimental study of the rock particle crushing effect using an image-based method

  L. Yu, P. Sun, S. Han, X. Tong, P. Peng

  Rev. int. métodos numér. cálc. diseño ing. (2023). Vol. 39, (4), 42

  
  

  Abstract

  When maging is used to detect the crushing effect of rock particles, the selected characterization parameters are important factors affecting the results. The image-based detection system is composed of three parts: an image acquisition system, a storage platform, and a digital image processing system.The influence of loading mode and feeding particle size on rock crushing degree and rock morphology characteristics after crushing are analyzed respectively; The crushing ratio and sand-forming ratio of limestone, limestone and granite under shear and extrusion loads are analyzed. The experimental results show that the crushing ratio and sand formation rate play a key role in the crushing of rocks composed of different materials under shear compression loading. The effect analysis of crushing under the feed particle size of 9.5 mm to 16mm shows that there is a great correlation between edges and corners, roundness and overall contour. It provides a basis for the follow-up research on intelligent mine construction and equipment optimization, and is worthy of further popularization and application.

  Abstract
  When maging is used to detect the crushing effect of rock particles, the selected characterization parameters are important factors affecting the results. The image-based [...]

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• The stone powder wall shaping mechanism on machine-made sand

  L. Yu, P. Sun, S. Han, Y. Song, H. Wu, X. Tong, P. Peng

  Rev. int. métodos numér. cálc. diseño ing. (2023). Vol. 39, (3), 32

  
  

  Abstract

  At present, the researches on the mechanical properties of sand aggregate mainly focus on the shaping process of particles, and lack the researches on the crushing mechanism. This paper first defines the shaping process of stone powder wall, and explores the crushing mechanism of sand aggregate by adopting multiple times of small energy crushing. The effect of energy is investigated by simulation and experiment. The machine-made sand crushing mechanism is analyzed by establishing corresponding contact mathematical models. The result shows that the stone powder wall involves two mathematical models under impact: the elastic-plastic model at low impact velocity and the elastic-brittle model at high impact velocity. 

  Abstract
  At present, the researches on the mechanical properties of sand aggregate mainly focus on the shaping process of particles, and lack the researches on the crushing mechanism. [...]

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• 111111

  Research Reports of the International Centre for Numerical Methods in Engineering (CIMNE) (2023). 1

  
  

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