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Volume 33 Issue 4
Jul 2019
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Chinese Journal of High Pressure Physics  > 2019  >  33(4): 044103.
LI Hongwei, LEI Zhan, JIANG Xiangyang, LIU Wei, HE Zhiwei, ZHANG Binbin. Numerical Analysis of Impact of Shot Hole Spacing on Crack Growth in Rock[J]. Chinese Journal of High Pressure Physics, 2019, 33(4): 044103. doi: 10.11858/gywlxb.20180683
Citation: LI Hongwei, LEI Zhan, JIANG Xiangyang, LIU Wei, HE Zhiwei, ZHANG Binbin. Numerical Analysis of Impact of Shot Hole Spacing on Crack Growth in Rock[J]. Chinese Journal of High Pressure Physics, 2019, 33(4): 044103. doi: 10.11858/gywlxb.20180683
shu

Numerical Analysis of Impact of Shot Hole Spacing on Crack Growth in Rock

doi: 10.11858/gywlxb.20180683

  • College of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China

  • Received Date: 09 Nov 2018
  • Rev Recd Date: 19 Nov 2018
    Abstract
  • In order to achieve full fragmentation of the rock and effectively use the explosive energy, the impact of different hole spacing on the rock (hornfels) blast crack extension was studied via ANSYS/LS-DYNA software package using fluid-structure interaction (ALE) algorithm. The results showed that with the increase of the distance between the two holes, the crack growth around the single gun hole becomes more sufficient, the comminution area around the gun hole increases, the generated branch small crack gradually decreases, the main crack increases, and the crack growth rate is about 0.42 times that of the longitudinal wave velocity of the rock. In the area between the two holes affected by the explosion stress wave of the adjacent holes, the main crack growth and expansion are more obvious, and with the increase of hole spacing, the position of the main crack interconnection is closer to the direction of connecting the center of the two holes. Engineering practice suggested that the results of numerical simulation has positive effect on blasting engineering, the results of numerical simulation can be used to guide the design of blasting scheme and can provide important reference value for the blasting engineering.

     

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