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作者:

Zhang, Shenghui (Zhang, Shenghui.) | Gao, Wenxue (Gao, Wenxue.) (学者:高文学) | Ye, Mingban (Ye, Mingban.) | Liu, Jiangchao (Liu, Jiangchao.) | Liu, Liansheng (Liu, Liansheng.) | Li, Xiaoshuai (Li, Xiaoshuai.) | Hu, Yu (Hu, Yu.)

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摘要:

It is necessary to study the dynamic response of particles under blasting excavation to ensure the safety of slope. Based on field blasting vibration monitoring experiments, the wavelet packet transforms and numerical calculations were used jointly to study the energy response of particles in a slope at different frequency bands and the dynamic response characteristics of key positions of the benches. The results indicated that the blasting vibration energy in a rock slope would change in different frequency bands. The energy attenuation and amplification effects were mainly manifest as high-frequency energy attenuation and low-frequency energy amplification, respectively. The peak particle velocity (PPV), energy, and peak stress of the slope surface are generally attenuated with the increase in the explosion source distance. The vibration energy in the 51-100Hz frequency band had the greatest attenuation, and the PPV of the vertical component was larger than that of the horizontal component. As the elevation increased, the vibration energy at the top of the bench had the largest amplification coefficient in the 11-25Hz frequency band. Both the particle stress concentration at the bottom of the bench and the "whiplash effect" of the PPV at the top of the bench may affect the stability of slope. Thus, the safety and stability of rock slopes should not be evaluated by only considering a single index, but it should be combined with a comprehensive analysis of multiple indices.

关键词:

Blasting vibration Whiplash effect Vibration energy PPV Rock slope Dynamic response

作者机构:

  • [ 1 ] [Zhang, Shenghui]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Gao, Wenxue]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Ye, Mingban]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Liu, Jiangchao]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 5 ] [Li, Xiaoshuai]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 6 ] [Hu, Yu]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 7 ] [Liu, Liansheng]Jiangxi Univ Sci & Technol, Sch Resource & Environm Engn, Ganzhou 341000, Peoples R China

通讯作者信息:

  • 高文学

    [Gao, Wenxue]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China

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来源 :

BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT

ISSN: 1435-9529

年份: 2021

期: 11

卷: 80

页码: 8453-8464

4 . 2 0 0

JCR@2022

ESI学科: GEOSCIENCES;

ESI高被引阀值:64

JCR分区:2

被引次数:

WoS核心集被引频次: 10

SCOPUS被引频次: 10

ESI高被引论文在榜: 0 展开所有

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