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<p>As shallow mineral resources become progressively depleted, mining activities are increasingly extending to greater depths. Rockburst incidents induced by the high-stress conditions associated with deep mining have become a major threat to personnel safety and operational continuity. Destress blasting is widely regarded as one of the most effective methods for reducing rockburst risk. It uses controlled explosions to fracture the rock mass ahead of the working face and redistributes concentrated stresses away from the working face. However, accurately evaluating its effectiveness remains a major challenge. Building upon existing numerical simulation results obtained using the LS-DYNA finite element software, this study employed the 3DEC discrete element software to perform dynamic simulations of destress blasting. A new energy-based quantitative evaluation method was developed and compared with conventional stress-based evaluation approaches. The findings reveal that dynamic loading can more accurately simulate the blasting effects, whereas traditional single-stress indicators cannot effectively assess destressing effectiveness. In contrast, the proposed energy-based method accounts for the 3D stress state of deep underground rock masses and provides a more comprehensive assessment of destress blasting performance. The differences in destress blasting effectiveness revealed by comparing various cross-sections and sampling intervals were also analyzed, and a recommended method for evaluating destress effects using energy density was proposed. The findings provide important insights into the accurate assessment of destress blasting effectiveness in deep mining operations.</p>

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Numerical Evaluation of the Effects of Destress Blasting on the Face of a Deep Drift Based on the Energy Method

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月8日

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  • Zongze Li,
  • Yang Zou,
  • Ping Zhang,
  • Changping Yi,
  • Jinyang Fan,
  • Deyi Jiang

摘要

As shallow mineral resources become progressively depleted, mining activities are increasingly extending to greater depths. Rockburst incidents induced by the high-stress conditions associated with deep mining have become a major threat to personnel safety and operational continuity. Destress blasting is widely regarded as one of the most effective methods for reducing rockburst risk. It uses controlled explosions to fracture the rock mass ahead of the working face and redistributes concentrated stresses away from the working face. However, accurately evaluating its effectiveness remains a major challenge. Building upon existing numerical simulation results obtained using the LS-DYNA finite element software, this study employed the 3DEC discrete element software to perform dynamic simulations of destress blasting. A new energy-based quantitative evaluation method was developed and compared with conventional stress-based evaluation approaches. The findings reveal that dynamic loading can more accurately simulate the blasting effects, whereas traditional single-stress indicators cannot effectively assess destressing effectiveness. In contrast, the proposed energy-based method accounts for the 3D stress state of deep underground rock masses and provides a more comprehensive assessment of destress blasting performance. The differences in destress blasting effectiveness revealed by comparing various cross-sections and sampling intervals were also analyzed, and a recommended method for evaluating destress effects using energy density was proposed. The findings provide important insights into the accurate assessment of destress blasting effectiveness in deep mining operations.