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Volume 37 Issue 3
Jun 2023
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Chinese Journal of High Pressure Physics  > 2023  >  37(3): 035301.
ZHOU Chaolan, LIU Zhixiang, YANG Xiaocong, LIU Lishun, ZHANG Shuangxia, MA Sizhou. Numerical Simulation on Optimization of Extrusion Blasting Parameters for Residual Ore Recovery[J]. Chinese Journal of High Pressure Physics, 2023, 37(3): 035301. doi: 10.11858/gywlxb.20220694
Citation: ZHOU Chaolan, LIU Zhixiang, YANG Xiaocong, LIU Lishun, ZHANG Shuangxia, MA Sizhou. Numerical Simulation on Optimization of Extrusion Blasting Parameters for Residual Ore Recovery[J]. Chinese Journal of High Pressure Physics, 2023, 37(3): 035301. doi: 10.11858/gywlxb.20220694
shu

Numerical Simulation on Optimization of Extrusion Blasting Parameters for Residual Ore Recovery

doi: 10.11858/gywlxb.20220694
  • 1.

    School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China

  • 2.

    Mining and Metallurgical Technology Group Co., Ltd., Beijing 102628, China

  • 3.

    National International Joint Research Center for Green Mining of Metal Mines, Beijing 102628, China

  • Received Date: 18 Nov 2022
  • Rev Recd Date: 07 Jan 2023
    • Available Online: 06 Apr 2023
  • Issue Publish Date: 05 Jun 2023
    Abstract
  • In order to reduce the waste of residual top and bottom pillars resources in the recovery process of Chaihulanzi gold mine, a numerical model of extrusion blasting was established based on LS-DYNA finite element software. According to the three minimum burden of 0.7, 0.8 and 1.0 m, and the three hole spacings of 0.8, 0.9 and 1.0 m, nine cases were designed. And the evaluation indicators of each case were obtained by analyzing the blasting crack propagation and pressure evolution, effective stress and effective plastic strain varying with time and ore damage during the blasting process. The fuzzy analytic hierarchy process (F-AHP) was used to construct the target relative superiority matrix and fuzzy judgment matrix, and the best blasting case was selected by a comprehensive evaluation. The results show that the minimum burden is 0.7 m and the hole spacing is 0.9 m, which is the optimal blasting parameter combination for extrusion blasting. The field test results show that the blasting effect is better with the optimized blasting parameters.

     

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