Optimization of relief hole blasting satisfying synergistic constraints of rock-breaking area and hole-bottom minimum burden

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Tunnelling and Underground Space Technology Pub Date : 2024-09-14 DOI:10.1016/j.tust.2024.106074

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Abstract

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, r_A and r_W, 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.

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优化泄爆孔爆破，满足破岩面积和孔底最小负荷的协同约束条件

为提高隧道爆破的破岩效果，提出了一种优化泄爆孔位的策略。该研究采用了两个预定义的算术级数来协调分配给每排孔的破岩面积和孔底最小负担。通过迭代计算来确定每排钻孔的最终位置。为确定最佳钻孔方案，使用有限元法-平滑粒子流体力学（FEM-SPH）耦合算法进行了建模和模拟。通过这种方法，可以比较不同约束组合下的泄爆孔的破岩效果。该研究表明，岩石颗粒的位移在不同深度区域有所不同。岩石颗粒的最大位移出现在装药段的中部。对于宽度为 12.2 米、设计进尺为 3 米的常规工作面，当两个控制比 rA 和 rW 分别为 1.5 和 1.4 时，岩石破碎效率最佳。这项研究推动了地下爆破设计技术的发展，为爆破工程的节能和增效做出了贡献。

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来源期刊

Tunnelling and Underground Space Technology 工程技术-工程：土木

CiteScore

11.90

自引率

18.80%

发文量

454

审稿时长

10.8 months

期刊介绍： Tunnelling and Underground Space Technology is an international journal which publishes authoritative articles encompassing the development of innovative uses of underground space and the results of high quality research into improved, more cost-effective techniques for the planning, geo-investigation, design, construction, operation and maintenance of underground and earth-sheltered structures. The journal provides an effective vehicle for the improved worldwide exchange of information on developments in underground technology - and the experience gained from its use - and is strongly committed to publishing papers on the interdisciplinary aspects of creating, planning, and regulating underground space.