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Research on Vibration Propagation Law and Dynamic Effect of Bench Blasting

Author

Listed:
  • Lu He

    (School of Energy and Mining Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China
    College of Mining, Guizhou University, Guiyang 550025, China)

  • Dezhong Kong

    (College of Mining, Guizhou University, Guiyang 550025, China
    State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, China)

  • Zhen Lei

    (School of Mining Engineering, Guizhou Institute of Technology, Guiyang 550003, China)

Abstract

To address the problem of damage to adjacent buildings (structures) caused by bench blasting construction, blasting in a sand and gravel mine in Guizhou Province was used as the background. Through on-site monitoring and numerical simulation, the blasting vibration propagation law and dynamic effect characteristics under the joint action of different bench heights and horizontal distances were studied. The regression model was established. The results show that: the peak vibration speed in all three directions with the increase in the horizontal distance of the burst center is a decaying trend, and the field measurements are basically consistent with the safe vibration speed and do not exceed 1.5 cm/s, so the house is in a safe state; shear stress with the increase in the horizontal distance of the burst center strictly decays, so the source of the shear stress and vibration speed decay faster in the near zone, with the slow decay in the far zone; analysis found that the shear stress and vibration speed are quadratic and exponential. Through the analysis of the regression model, it is obtained that there is no co-linearity among the influencing factors, which has a significant effect on the regression equation and regression coefficient, and so the multiple linear regression equation fits well. The model can predict the blast vibration intensity, which can be used as a safety criterion for buildings under the action of blasting, and provides a reference for blast vibration control, hole network parameters, and the design index.

Suggested Citation

  • Lu He & Dezhong Kong & Zhen Lei, 2022. "Research on Vibration Propagation Law and Dynamic Effect of Bench Blasting," Mathematics, MDPI, vol. 10(16), pages 1-21, August.
  • Handle: RePEc:gam:jmathe:v:10:y:2022:i:16:p:2951-:d:889727
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    References listed on IDEAS

    as
    1. Jing Gao & Cong Huang & Xiaomin Huang & Jian-Jun Ren & Na Wang & Fuqiang Ren, 2022. "A Study of Blast Vibration Propagation Law under Negative Altitude Terrains," Mathematical Problems in Engineering, Hindawi, vol. 2022, pages 1-11, March.
    2. Yuqi Shang & Dezhong Kong & Shijiang Pu & Yu Xiong & Qiang Li & Zhanbo Cheng, 2022. "Study on Failure Characteristics and Control Technology of Roadway Surrounding Rock under Repeated Mining in Close-Distance Coal Seam," Mathematics, MDPI, vol. 10(13), pages 1-18, June.
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    Cited by:

    1. Miljana Milić & Jelena Milojković & Miljan Jeremić, 2022. "Optimal Neural Network Model for Short-Term Prediction of Confirmed Cases in the COVID-19 Pandemic," Mathematics, MDPI, vol. 10(20), pages 1-18, October.

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