Abstract：Parametric calculation method based on electronic detonator is the basis of precision and intelligence of blast control, and its study is still at the starting stage.Here, taking Chongqing Guanyin Bridge tunnel as the study background, the multi-factor coupling method to accurately determine blast parameters of electronic detonator was proposed with the feature to design blast parameters based on their complex coupled relations.The study showed that the optimal delay values of different charges are different, the number of blast-holes has a significant influence on the optimal delay and the maximum synthetic vibration velocity; the optimal blast parameters of the tested tunnel determined with the proposed method are 8 holes with hole-by-hole cutting, 1.4 kg single hole charge, and 5 ms inter-hole delay.Two groups of cutting blast tests with delays of 5 ms and 8 ms were designed on-site, and the formation time of the second free surface for two delays cutting blast inter-hole was analyzed.The test results showed that for short delay cutting blast, even if the second free surface is not formed, the multi-factor coupling method can realize better vibration reduction effect through the maximum degree of waveform opposite direction cancellation; the multi-factor coupling method is compared with the half-period phase staggering vibration reduction method, the delay inter-hole calculated using the latter can’t be ensured to be the optimal delay, it may cause a larger synthetic vibration velocity; when the blast vibration needs to be controlled strictly, the multi-factor coupling method can realize the precise design of blast parameters.
刘翔宇，龚敏，吴昊骏，安迪. 多因素耦合影响下隧道电子雷管爆破参数的计算与实践[J]. 振动与冲击, 2021, 40(5): 24-32.
LIU Xiangyu, GONG Min, WU Haojun, AN Di. Calculation and practice of blasting parameters of electronic detonator in tunnel under the influence of multi-factor coupling. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(5): 24-32.
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