Safety assessment and control of blasting vibration based on the probability theory

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (14) : 122-129.

WANG Linfeng1,2，DENG Bingjie1,2，MO Qu2,3，ZHAO Jingfu4，XIAO Hongguang4

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Abstract

The prediction of blasting vibration speed and vibration safety control are always the focus of attention in blasting construction.A basic formula was selected as the blasting vibration velocity prediction model, and the parameters K,a,b were solved based on the principle of least square method.Considering the randomness of blasting vibration, the relative error of blasting vibration velocity (REBVV) was defined.Assuming that the REBVV obeys the normal distribution with the mean value of 0, the distribution model of blasting vibration velocity was deduced by virtue of the transferability of the normal distribution.To improve the utilization ratie of measured data, the relative error variance of generalized blasting vibration velocity was proposed to replace the relative error variance of blasting vibration velocity.By introducing the concept of confidence level in the probability theory, a safety control and evaluation model of blasting vibration was established.Taking the confidence level as 95%, based on the established safety control and evaluation model, suggestions about the blasting construction safety for key controlled sections of the project were provided.

Key words

blasting vibration / velocity prediction model / normal distribution / confidence level / safety control

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WANG Linfeng1,2，DENG Bingjie1,2，MO Qu2,3，ZHAO Jingfu4，XIAO Hongguang4. Safety assessment and control of blasting vibration based on the probability theory[J]. Journal of Vibration and Shock, 2020, 39(14): 122-129

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