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