Numerical simulation of rock fragmentation during cutting by conical picks under confining pressure

Xuefeng Li; Shibo Wang; Shirong Ge; Reza Malekian; Zhixiong Li

doi:10.1016/j.crme.2017.09.004

Numerical simulation of rock fragmentation during cutting by conical picks under confining pressure

Xuefeng Li ¹; Shibo Wang ^1,² ; Shirong Ge ^1,²; Reza Malekian ³; Zhixiong Li ^1,⁴

¹ School of Mechanical Engineering, China University of Mining and Technology, Xuzhou 221000, China
² Collaborative Innovation Center of Intelligent Mining Equipment, China University of Mining and Technology, Xuzhou 221000, China
³ Department of Electrical, Electronic & Computer Engineering, University of Pretoria, Pretoria 0002, South Africa
⁴ School of Mechanical and Manufacturing Engineering, UNSW Australia, Sydney 2052, Australia

Comptes Rendus. Mécanique, Volume 345 (2017) no. 12, pp. 890-902.

Abstract

In this article, the effect of confining pressure on rock fragmentation process during cutting was investigated by numerical simulation with a discrete element method (DEM). Four kinds of sandstones with different physical properties were simulated in the rock cutting models under different confining pressures. The rock fragmentation process, the cutting force, and the specific energy under different confining pressures were analyzed. With the increase in confining pressure and rock strength, the vertical propagation of cracks was restrained. Rock samples were compacted and strengthened by confining pressure resulting in the increase of the cutting force. The specific energy of rock cutting linearly increased with the increase of the confining pressure ratio.

Received: 2017-06-08
Accepted: 2017-09-19
Published online: 2017-11-07

DOI: 10.1016/j.crme.2017.09.004

Mots-clés : Discrete element method, Confining pressure, Rock fragment, Deep mine, Conical pick

Author's affiliations:

Xuefeng Li ¹; Shibo Wang ^{1, 2}; Shirong Ge ^{1, 2}; Reza Malekian ³; Zhixiong Li ^{1, 4}

¹ School of Mechanical Engineering, China University of Mining and Technology, Xuzhou 221000, China
² Collaborative Innovation Center of Intelligent Mining Equipment, China University of Mining and Technology, Xuzhou 221000, China
³ Department of Electrical, Electronic & Computer Engineering, University of Pretoria, Pretoria 0002, South Africa
⁴ School of Mechanical and Manufacturing Engineering, UNSW Australia, Sydney 2052, Australia

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     author = {Xuefeng Li and Shibo Wang and Shirong Ge and Reza Malekian and Zhixiong Li},
     title = {Numerical simulation of rock fragmentation during cutting by conical picks under confining pressure},
     journal = {Comptes Rendus. M\'ecanique},
     pages = {890--902},
     publisher = {Elsevier},
     volume = {345},
     number = {12},
     year = {2017},
     doi = {10.1016/j.crme.2017.09.004},
     language = {en},
}

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Xuefeng Li; Shibo Wang; Shirong Ge; Reza Malekian; Zhixiong Li. Numerical simulation of rock fragmentation during cutting by conical picks under confining pressure. Comptes Rendus. Mécanique, Volume 345 (2017) no. 12, pp. 890-902. doi : 10.1016/j.crme.2017.09.004. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2017.09.004/

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