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<p>To elucidate the influence mechanism of multi-source dynamic disturbances on slope stability in open-pit coal mines, this study focuses on the west slope of the first mining area in Hesigewula South Open-pit Coal Mine. A blasting vibration monitoring system (with MEMS triaxial accelerometers and a cloud-based platform) was deployed from January 1 to June 28, 2025, recording 740 vibration events. Dynamic parameters including vibration duration, peak acceleration, peak velocity, amplitude, and dominant frequency were systematically analyzed. A Geo-slope numerical model incorporating lithological weak planes and hydrogeological conditions was established based on the Mohr-Coulomb constitutive model, simulating 19 typical vibration scenarios. The results indicate: (1) Vibration durations ranged from 78 to 9448 ms, with peak accelerations up to 92.472&#xa0;mg (Z-direction), peak velocities up to 1.908&#xa0;cm/s, maximum amplitude of 31.019&#xa0;cm (Y-direction), and dominant frequencies concentrated between 20 and 60&#xa0;Hz. (2) Numerical simulations show that vibration accelerations significantly reduce the slope stability factor, with the lowest value of 1.161 under the scenario of June 5, 2025 (horizontal 30.184&#xa0;mg, vertical 25.833&#xa0;mg). (3) The vibration peak acceleration increased significantly during the summer construction peak, and the impact on the stability of the slope was intensified. Based on the analysis between vibration parameters and stability coefficients, it is recommended to set a threshold value of vibration acceleration (e.g., &gt; 20&#xa0;mg) as an early warning indicator, to control the distance of vibration source, blasting quantity value, etc., so as to achieve active prevention and control of the slope under disturbance. This study provides theoretical and support for the monitoring and prevention of dynamic disasters of open-pit coal mine slopes. .</p>

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Research on the Stability of Soft Rock Slope in Open-pit Coal Mine Under Multi-source Vibration

  • 期刊论文

  • 发表日期：

    2026年2月14日

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  • Gan Liu,
  • Shuangshuang Xiao,
  • Kai Zhang,
  • Hongbo Li

摘要

To elucidate the influence mechanism of multi-source dynamic disturbances on slope stability in open-pit coal mines, this study focuses on the west slope of the first mining area in Hesigewula South Open-pit Coal Mine. A blasting vibration monitoring system (with MEMS triaxial accelerometers and a cloud-based platform) was deployed from January 1 to June 28, 2025, recording 740 vibration events. Dynamic parameters including vibration duration, peak acceleration, peak velocity, amplitude, and dominant frequency were systematically analyzed. A Geo-slope numerical model incorporating lithological weak planes and hydrogeological conditions was established based on the Mohr-Coulomb constitutive model, simulating 19 typical vibration scenarios. The results indicate: (1) Vibration durations ranged from 78 to 9448 ms, with peak accelerations up to 92.472 mg (Z-direction), peak velocities up to 1.908 cm/s, maximum amplitude of 31.019 cm (Y-direction), and dominant frequencies concentrated between 20 and 60 Hz. (2) Numerical simulations show that vibration accelerations significantly reduce the slope stability factor, with the lowest value of 1.161 under the scenario of June 5, 2025 (horizontal 30.184 mg, vertical 25.833 mg). (3) The vibration peak acceleration increased significantly during the summer construction peak, and the impact on the stability of the slope was intensified. Based on the analysis between vibration parameters and stability coefficients, it is recommended to set a threshold value of vibration acceleration (e.g., > 20 mg) as an early warning indicator, to control the distance of vibration source, blasting quantity value, etc., so as to achieve active prevention and control of the slope under disturbance. This study provides theoretical and support for the monitoring and prevention of dynamic disasters of open-pit coal mine slopes. .