Effects of delay error of electronic detonator on tunnel blasting vibration based on Monte Carlo method
LIU Xiangyu,GONG Min,YANG Renshu,WU Haojun,WANG Sijie
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School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China
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Received
Revised
Published
2023-02-10
2023-05-24
2023-12-15
Issue Date
2023-12-15
Abstract
The blasting of urban tunnel in complex environment requires strict vibration velocity. In order to study the influence of delay error of electronic detonator on the superimposed vibration of multi-hole delay blasting, the maximum superimposed vibration velocity of multi-hole blasting is calculated based on Anderson theory with the background of Chongqing Beida Road Tunnel. First, the necessity of considering the delay error of each section of electronic detonators is discussed. Using Monte Carlo method and ergodic method, the calculation program is designed to analyze and study the influence of delay error of electronic detonator on blasting superimposed vibration velocity under different delay, different holes and different delay accuracy. The results show that when considering the ± 1 ms delay error of electronic detonator, the maximum superimposed vibration velocity of each delay almost increases. The delay error has a significant impact on the small delay. When considering the delay error, the superimposed vibration velocity of the small delay (<20 ms) all exceeds the standard, while the superimposed vibration velocity of the large delay (>20 ms) has part of the delay which does not exceed the standard. The number of cutting holes mainly affects the superimposed vibration velocity of delay error to small delay. With the increase of the number of cutting holes, the difference of maximum superimposed vibration velocity of 4 ms and 5 ms delay with and without delay error increases. The delay precision of electronic detonator is approximately linear with the maximum superimposed vibration velocity. The delay precision of electronic detonator has more significant influence on the smaller delay. The research results can provide reference for the parameter design and vibration control of electronic detonator in engineering practice.
LIU Xiangyu,GONG Min,YANG Renshu,WU Haojun,WANG Sijie.
Effects of delay error of electronic detonator on tunnel blasting vibration based on Monte Carlo method[J]. Journal of Vibration and Shock, 2023, 42(23): 192-198
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