Rock and Soil Mechanics ›› 2021, Vol. 42 ›› Issue (8): 2239-2249.doi: 10.16285/j.rsm.2021.0040

• Geotechnical Engineering • Previous Articles     Next Articles

Analysis of blasting control parameters and reliability based on rock mass quality

YU Chong1, 2, YUE Hao-zhen1, 2, LI Hai-bo1, 2, ZHOU Chuan-bo3, CHEN Shi-hai4, SHAO Zhu-shan5   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China; 3. Faculty of Engineering, China University of Geosciences, Wuhan, Hubei 430074, China; 4. College of Civil Engineering, Huaqiao University, Xiamen, Fujian 361021, China; 5. School of Civil Engineering, Xi'an University of Architecture & Technology, Xi'an, Shaanxi 710055, China
  • Received:2021-01-07 Revised:2021-03-21 Online:2021-08-11 Published:2021-08-16
  • Supported by:
    This work was supported by the National Key Research and Development Program of China (2020YFA0711802) and the National Natural Science Foundation of China (51439008, 51779248).

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Abstract: In China's existing blasting-related standards, the control parameters (K and a) of blasting vibration in the Sadovsky formula are selected only based on the softness and hardness of the rock, which is subjective and arbitrary. In order to solve this problem, the blasting vibration attenuation law and the rock mass quality classification of some engineering examples were statistically analyzed, and the control parameters K and a were quantitatively expressed. In addition, in view of the uncertainty of blasting vibration caused by the discrete characteristics of rock mass parameters, a probability analysis of the peak particle velocity (PPV) was also carried out. The results showed that: 1) By comparing with the field blasting test, the established relationships between K, a and BQ (the basic quality classification index of rock mass) can be applied to the selection of control parameters in case of the absence of field blasting test data; 2) The proposed method for probabilistic analysis of blasting vibration can take into account the discrete properties of rock mass and the attenuation law of blasting vibration measured on site. The obtained probability distribution of PPV uncertainty factor can quantitatively evaluate the reliability of blasting vibration, which is a necessary supplement to reasonably predict PPV.

Key words: rock mass quality, blasting vibration, reliability, field blasting tests, uncertainty analysis, SPH-FEM coupling

CLC Number: 

  • TU 452
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