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<p>Blasting is a widely used rock fragmentation technique in geotechnical engineering, and its effectiveness is significantly influenced by the surrounding stress conditions. To address the unclear relationship between stress levels and the characteristics of rock damage induced by blasting, this study employs laboratory experimental methods to investigate the spatiotemporal evolution patterns of acoustic emission in rocks subjected to blasting disturbances under different stress levels. The attenuation patterns of acoustic emission in rocks subjected to blasting disturbances under different stress levels were quantitatively described in both spatial and temporal dimensions. Furthermore, the quantitative relationship between stress levels and the spatiotemporal distribution characteristics (STDC) of acoustic emission was elucidated. The attenuation rate of acoustic emission after blasting tends to decrease with increasing stress level under uniaxial stress, with both exhibiting a linear negative correlation. Additionally, the trend of the acoustic emission attenuation rate with increasing stress becomes more pronounced for samples with lower uniaxial compressive strengths. The acoustic emission caused by blasting disturbances exhibits a power law attenuation characteristic in the spatial dimension, and the spatial fractal dimension D of the acoustic emission is positively correlated with the stress level. Therefore, investigating the quantitative relationship between rock failure characteristics and in-situ stress states under blasting-induced disturbances through acoustic emission monitoring is crucial for assessing rock mass stability and implementing disaster prevention and control strategies in mining engineering.</p>

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Study of the Relationship Between the Attenuation Pattern of Acoustic Emissions and Stress Levels After a Blasting Disturbance

  • 期刊论文

  • 发表日期：

    2025年6月16日

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  • Shida Xu,
  • Tianxiao Chen,
  • Benguo He,
  • Yuanhui Li

摘要

Blasting is a widely used rock fragmentation technique in geotechnical engineering, and its effectiveness is significantly influenced by the surrounding stress conditions. To address the unclear relationship between stress levels and the characteristics of rock damage induced by blasting, this study employs laboratory experimental methods to investigate the spatiotemporal evolution patterns of acoustic emission in rocks subjected to blasting disturbances under different stress levels. The attenuation patterns of acoustic emission in rocks subjected to blasting disturbances under different stress levels were quantitatively described in both spatial and temporal dimensions. Furthermore, the quantitative relationship between stress levels and the spatiotemporal distribution characteristics (STDC) of acoustic emission was elucidated. The attenuation rate of acoustic emission after blasting tends to decrease with increasing stress level under uniaxial stress, with both exhibiting a linear negative correlation. Additionally, the trend of the acoustic emission attenuation rate with increasing stress becomes more pronounced for samples with lower uniaxial compressive strengths. The acoustic emission caused by blasting disturbances exhibits a power law attenuation characteristic in the spatial dimension, and the spatial fractal dimension D of the acoustic emission is positively correlated with the stress level. Therefore, investigating the quantitative relationship between rock failure characteristics and in-situ stress states under blasting-induced disturbances through acoustic emission monitoring is crucial for assessing rock mass stability and implementing disaster prevention and control strategies in mining engineering.