Abstract:To address the optimization of medium-deep hole blasting parameters following the implementation of charging trucks in Chengchao Iron Mine, this study established a fluid-structure coupling model using ANSYS / LS-DYNA based on the existing blasting scheme. Seventeen different configurations combining four borehole bottom spacings and four staggered uncharged section layouts were compared and analyzed in terms of fracture zone mass, explosive consumption per unit, and effective stress. The results demonstrate that the optimal blasting parameters are a borehole bottom spacing of 2 m with uncharged sections of 2 m and 6 m. This configuration achieves a fractured zone mass of 820 tons, representing a 38. 5% improvement over the original scheme ( 592 tons ), while maintaining the lowest explosive consumption per unit and ensuring that the effective stress in the ore rock exceeds the yield strength. The optimized approach reduces both drilling work and explosive consumption without compromising blasting effectiveness, offering valuable insights for optimizing medium-deep hole blasting parameters in similar mining operations.
