Volume 30 Issue 2
Jun 2016
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ZHAO Jian, SHI Chao, XU Yi-Ji, XING Xue-Yang, WANG Rui-Ying, Li Jian-Bo. Numerical and Experimental Analysis of Rock Breaking Effect bySteel Shot Impacting Intervention[J]. Chinese Journal of High Pressure Physics, 2016, 30(2): 163-169. doi: 10.11858/gywlxb.2016.02.012
Citation: ZHAO Jian, SHI Chao, XU Yi-Ji, XING Xue-Yang, WANG Rui-Ying, Li Jian-Bo. Numerical and Experimental Analysis of Rock Breaking Effect bySteel Shot Impacting Intervention[J]. Chinese Journal of High Pressure Physics, 2016, 30(2): 163-169. doi: 10.11858/gywlxb.2016.02.012

Numerical and Experimental Analysis of Rock Breaking Effect bySteel Shot Impacting Intervention

doi: 10.11858/gywlxb.2016.02.012
  • Received Date: 08 Jul 2014
  • Rev Recd Date: 03 Aug 2014
  • Compared with the conventional rock breaking by high pressure water jet, the energy efficiency can be greatly improved by adding steel shots into the water jet.The transient nonlinear dynamics finite element simulation software was used to analyze the rock breaking process by steel shots, which was further verified by the results of indoor experiments.The rock breaking process can be divided into three stages:at the beginning the penetration depth increased fast from 0 to 20 s, then the invasion speed decreased gradually from 20 to 80 s, and finally, the penetration depth remained unchanged after it reached 80 s.In addition, it is not a proportional relationship between the rock breaking volume and the steel shot concentration due to the steel shots' intervention. The experimental results can be summarized as follows:When the steel shot concentration is 0.5%~3.0%, the rock breaking volume increases remarkably with the increase of the steel shot concentration.However, when the concentration exceeds 3.0%, the rock breaking volume is almost unchanged as the steel shot concentration increases.

     

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