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<p>As mining depth continues to increase, the influence of in-situ stress on deep shafts becomes increasingly pronounced. During drill-and-blast excavation, the shaft lining is subjected to both the redistribution of in-situ stress and blasting-induced dynamic loading. To investigate the vibration response characteristics of shaft linings under such conditions, a cut-blasting model test of an ultra-deep shaft was carried out based on similarity theory, combined with an actual shaft excavation project. The test results reveal the attenuation characteristics of vibration propagation under the combined effect of in-situ stress and blasting loads. Furthermore, numerical simulations were performed to analyze the stress distribution and vibration response of the shaft lining under different in-situ stress levels and non-uniform in-situ stress fields. The results show that under in‑situ stress conditions, the peak particle velocity (PPV) at monitored points decreases as the in‑situ stress increases. Moreover, the PPV of the shaft lining rises significantly with the horizontal lateral pressure coefficient, with vibration peaks concentrated mainly along the direction of the minimum horizontal principal stress. Due to the weaker lateral constraint in this direction, the shaft lining is more prone to local damage propagation and overall structural instability. These findings provide a theoretical basis and practical guidance for the safety assessment and vibration control of deep shaft linings in engineering practice.</p>

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Shaft Lining Vibration Response During Blasting Excavation in Deep Shafts

  • 期刊论文

  • 发表日期：

    2026年8月2日

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  • Changbang Liu,
  • Li Xiong,
  • Chunping Wu,
  • Yongsheng Jia,
  • Xinnan Cui,
  • Yingkang Yao,
  • Mengfei Yu,
  • Jiarun Huang,
  • Jinshan Sun,
  • Honggang Wang,
  • Chuang Liu

摘要

As mining depth continues to increase, the influence of in-situ stress on deep shafts becomes increasingly pronounced. During drill-and-blast excavation, the shaft lining is subjected to both the redistribution of in-situ stress and blasting-induced dynamic loading. To investigate the vibration response characteristics of shaft linings under such conditions, a cut-blasting model test of an ultra-deep shaft was carried out based on similarity theory, combined with an actual shaft excavation project. The test results reveal the attenuation characteristics of vibration propagation under the combined effect of in-situ stress and blasting loads. Furthermore, numerical simulations were performed to analyze the stress distribution and vibration response of the shaft lining under different in-situ stress levels and non-uniform in-situ stress fields. The results show that under in‑situ stress conditions, the peak particle velocity (PPV) at monitored points decreases as the in‑situ stress increases. Moreover, the PPV of the shaft lining rises significantly with the horizontal lateral pressure coefficient, with vibration peaks concentrated mainly along the direction of the minimum horizontal principal stress. Due to the weaker lateral constraint in this direction, the shaft lining is more prone to local damage propagation and overall structural instability. These findings provide a theoretical basis and practical guidance for the safety assessment and vibration control of deep shaft linings in engineering practice.