中国矿山工程

Aiming at the problem of low accuracy of predicting particle peak velocity by traditional empirical formula in electronic detonator initiation technology, this paper classifies the particle peak velocity according to different hole types according to the characteristics of electronic detonator blasting construction, and proposes a piecewise particle peak velocity prediction method, which is combined with metal mine tunnel blasting. The results show that the traditional Sadowski empirical formula is not suitable for predicting the peak particle velocity of electronic detonator blasting; After sorting the holes according to the delay time, the peak particle velocity can be predicted by Sadowski empirical formula. The part with the largest predicted value of each type of blast holes under the proportional distance charge is selected. Based on this, the combined curve has a better fitting effect.