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

被引：47
|
作者：
Li, Xuefeng [1 ]
Wang, Shibo [1 ,2 ]
Ge, Shirong [1 ,2 ]
Malekian, Reza [3 ]
Li, Zhixiong [1 ,4 ]
机构：
[1] China Univ Min & Technol, Sch Mech Engn, Xuzhou 221000, Peoples R China
[2] China Univ Min & Technol, Collaborat Innovat Ctr Intelligent Min Equipment, Xuzhou 221000, Peoples R China
[3] Univ Pretoria, Dept Elect Elect & Comp Engn, ZA-0002 Pretoria, South Africa
[4] UNSW Australia, Sch Mech & Mfg Engn, Sydney, NSW 2052, Australia
来源：
COMPTES RENDUS MECANIQUE | 2017年 / 345卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Discrete element method; Confining pressure; Rock fragment; Deep mine; Conical pick; TBM CUTTERS; STRESS; PERFORMANCE; INDENTATION; BREAKING; TOOLS;
D O I：
10.1016/j.crme.2017.09.004
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
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. (C) 2017 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
引用
收藏
页码：890 / 902
页数：13
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