A strategy to optimize relief hole positions is proposed to enhance the effectiveness of tunnel blasting in rock breaking. This study employed two predefined arithmetic progressions to coordinate the distribution of rock-breaking areas and hole-bottom minimum burdens allocated to each row of holes. Iterative calculations were performed to determine the final position of each row of holes. To determine the optimal drilling scheme, modeling and simulation were conducted using a finite element method-smoothed particle hydrodynamics (FEM-SPH) coupling algorithm. This approach allowed for a comparison of the rock-breaking effects of relief holes under different constraint combinations. This study indicates that the displacement of rock particles varies in different depth zones. The largest displacements of the rock particles were observed in the middle of the charge section. For a conventional working face with a width of 12.2 m and a designed advance of 3 m, the rock-breaking efficiency is optimal when the two control ratios, and , are 1.5 and 1.4, respectively. This study advances the underground blasting design technology and contributes to energy reduction and efficiency improvements in blasting engineering.

中文翻译：

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满足破岩面积与孔底最小载荷协同约束的泄压孔爆破优化


提出了优化泄压孔位置的策略，以提高隧道爆破破岩的有效性。本研究采用两个预定义的算术级数来协调岩石破碎区域的分布和分配给每排孔的孔底最小负荷。进行迭代计算以确定每排孔的最终位置。为了确定最佳钻井方案，采用有限元法-平滑粒子流体动力学（FEM-SPH）耦合算法进行建模和仿真。这种方法可以比较不同约束组合下泄压孔的破岩效果。研究表明，不同深度区域岩石颗粒的位移存在差异。在装药部分的中部观察到岩石颗粒的最大位移。对于宽度为12.2 m、设计进给3 m的常规工作面，当两个控制比 和 分别为1.5和1.4时，破岩效率最佳。该研究推进了地下爆破设计技术，为爆破工程节能增效做出了贡献。