现场爆破模型试验中抛掷距离相似性研究

通过对某坑道出口工程的爆破相似率、动力相似条件及工程岩体爆破破坏机理分析,介绍了爆破模型试验的主要相似参数及动力相似问题。重点讨论了现场爆破模型试验中抛掷距离的相似关系,在抛体堆积法的基础上,得出了抛掷距离与几何相似比近似成4/3次幂关系,在现场爆破模型试验中,抛掷距离直接按几何相似比进行设计满足工程需要。

Research on the Similarity of Throwing Distance in On-site Blasting Model Test

Through analyzing blasting similar rate,dynamic similarity conditions and failure mechanism of engineering rock at a tunnel exit,the paper describes the similar parameters and dynamic similarity problems of blasting model test.Focusing on the similarity relation of the thrown distance of on-site blasting model test,based on projectile accumulation method,it concludes that the approximate ratio of thrown distance and geometric similarity is 4/3 power.It meets the project needs that thrown distance can be directly designed by geometric similarity in a large-scale on-site blasting model test.