Energy dissipation characteristics of sandstone cutting under mechanical impact load
Wang Shuren1, Su Junqing1, Hagan Paul2
COMPUTER MODELLING & NEW TECHNOLOGIES 2014 18(3) 13-20
1 School of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao, 066004, China
2 School of Mining Engineering, University of New South Wales, Sydney, 2052, Australia
Based on the sandstone experiment by using the linear rock cutting machine at the school of mining engineering, University of New South Wales (UNSW), the computational model was built by using particle flow code (PFC), and the energy dissipation characteristics was studied considering these parameters such as cutting speed, cutting depth, rock strength, rock temperature and rock confining pressure. The results showed that the specific energy and acoustic emission of sandstone were proportional to the cutting speed and rock strength, there was an optimal depth of rock cutting with the cutting depth increasing under the confining pressure condition, and the specific energy and acoustic emission of sandstone changed obviously due to the influence of the rock temperature and rock confining pressure.