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Shock and Vibration
Volume 2014 (2014), Article ID 219489, 11 pages
http://dx.doi.org/10.1155/2014/219489
Research Article

Numerical Simulation of Rock Fragmentation under the Impact Load of Water Jet

School of Mechanical and Electrical Engineering, China University of Mining & Technology, Xuzhou 221116, China

Received 28 October 2013; Accepted 3 December 2013; Published 12 February 2014

Academic Editor: Vadim V. Silberschmidt

Copyright © 2014 Jiang Hongxiang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

To investigate the rock fragmentation and its influence factors under the impact load of water jet, a numerical method which coupled finite element method (FEM) with smoothed particle hydrodynamics (SPH) was adopted to simulate the rock fragmentation process by water jet. Linear and shock equations of state were applied to describe the dynamic characteristics of rock and water, respectively, while the maximum principal stress criterion was used for the rock failure detection. The dynamic stresses at the selected element containing points in rock are computed as a function of time under the impact load of water jet. The influences of the factors of boundary condition, impact velocity, confining pressure, and structure plane on rock dynamic fragmentation are discussed.