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Shock and Vibration
Volume 2015, Article ID 678573, 12 pages
http://dx.doi.org/10.1155/2015/678573
Research Article

Numerical Tests on Failure Process of Rock Particle under Impact Loading

Yu-Jun Zuo,1,2,3,4 Qin Zhang,1,2,3,4 Tao Xu,5 Zhi-Hong Liu,1,2,3,4 Yue-Qin Qiu,1,2,3,4 and Wan-Cheng Zhu5

1Mining College, Guizhou University, Guiyang, Guizhou 550025, China
2Guizhou Key Laboratory of Comprehensive Utilization of Non-Metallic Mineral Resources, Guizhou University, Guiyang, Guizhou 550025, China
3Guizhou Engineering Lab of Mineral Resources, Guiyang, Guizhou 550025, China
4Engineering Center for Safe Mining Technology under Complex Geologic Condition, Guiyang, Guizhou 550025, China
5School of Resources & Civil Engineering, Northeastern University, Shenyang, Liaoning 110004, China

Received 14 July 2014; Accepted 28 September 2014

Academic Editor: Caiping Lu

Copyright © 2015 Yu-Jun Zuo 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

By using numerical code RFP (dynamic version), numerical model is built to investigate the failure process of rock particle under impact loading, and the influence of different impact loading on crushing effect and consumed energy of rock particle sample is analyzed. Numerical results indicate that crushing effect is good when the stress wave amplitude is close to the dynamic strength of rock; it is difficult for rock particle to be broken under too low stress wave amplitude; on the other hand, when stress wave amplitude is too high, excessive fine particle is produced, and crushing effect is not very good on the whole, and more crushing energy is consumed. Secondly, in order to obtain good crushing effect, it should be avoided that wavelength of impact load be too short. Therefore, it is inappropriate to choose impact rusher with too high power and too fast impact frequency for ore particle.