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<p>The control of blasting-induced vibrations is critical for ensuring the safe and efficient implementation of the drilling and blasting method. Presplit blasting is a widely employed technique for mitigating vibration effects. In this study, numerical simulation models were developed to compare the time-pressure and time-vibration velocity curves at various monitoring points for three blasting approaches: original bench blasting, single presplit blasting, and double presplit blasting. The stress propagation, damage distribution, and presplit crack(zone) formation processes were analyzed for each mode. Based on the simulation results, field tests were conducted on high and steep slopes to evaluate the three blasting modes. Blasting vibration signals were recorded using monitoring points placed around the blasting sources. The collected data were analyzed to assess waveform characteristics, spectral properties, and energy distribution patterns of the blasting vibrations. The results showed that both the single and double presplit blasting mode approaches demonstrated significant reductions in PPV compared to original bench blasting tests. In the experiments, on average, the single presplit blasting mode resulted in a 34.38% reduction in PPV, while the double presplit blasting mode achieved a more substantial average reduction of 59.54%. Notably, the vibration isolation effect of double presplit blasting mode is superior to that of single presplit blasting mode. This study provides valuable insights into the efficacy of presplit blasting techniques in reducing blasting vibrations.</p>

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Vibration Reduction by Using Multi-presplit in High-Steep Slope Excavation: Insights from Simulations and Field Experiments

  • 期刊论文

  • 发表日期：

    2025年4月16日

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  • Linqi Huang,
  • Zhaowei Wang,
  • Qiyue Li,
  • Kai Liu,
  • Huiming Shen,
  • Caiping Fu,
  • Hongfa Liu,
  • Ziqiang Liu

摘要

The control of blasting-induced vibrations is critical for ensuring the safe and efficient implementation of the drilling and blasting method. Presplit blasting is a widely employed technique for mitigating vibration effects. In this study, numerical simulation models were developed to compare the time-pressure and time-vibration velocity curves at various monitoring points for three blasting approaches: original bench blasting, single presplit blasting, and double presplit blasting. The stress propagation, damage distribution, and presplit crack(zone) formation processes were analyzed for each mode. Based on the simulation results, field tests were conducted on high and steep slopes to evaluate the three blasting modes. Blasting vibration signals were recorded using monitoring points placed around the blasting sources. The collected data were analyzed to assess waveform characteristics, spectral properties, and energy distribution patterns of the blasting vibrations. The results showed that both the single and double presplit blasting mode approaches demonstrated significant reductions in PPV compared to original bench blasting tests. In the experiments, on average, the single presplit blasting mode resulted in a 34.38% reduction in PPV, while the double presplit blasting mode achieved a more substantial average reduction of 59.54%. Notably, the vibration isolation effect of double presplit blasting mode is superior to that of single presplit blasting mode. This study provides valuable insights into the efficacy of presplit blasting techniques in reducing blasting vibrations.