数码电子雷管逐孔起爆下质点峰值振速预测研究

Prediction of Particle Peak Vibration Velocity under Hole-by-hole Initiation of Digital Electronic Detonator

针对电子雷管起爆技术采用传统经验公式预测质点峰值振速精度较低的问题,本文根据电子雷管爆破施工的特点,将其按炮孔类型的不同进行分类,提出了一种分段式的质点峰值振速预测方法,并结合金属矿山巷道爆破进行了试验。结果表明:传统萨道夫斯基经验公式不适用于数码电子雷管爆破的质点峰值振速预测;按照延期时间将炮孔分类后,其质点峰值振速可利用萨道夫斯基经验公式进行预测,选取比例距离药量下各类型炮孔的预测值最大的部分,基于此组成拟合曲线,此组合式曲线具有较好的拟合效果。

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.