西南交通大学学报(英文版)2009，Vol.17Issue(1)：42-46,5.
Vibration Superposition in Tunnel Blasting with Millisecond Delay
Vibration Superposition in Tunnel Blasting with Millisecond Delay
摘要
Abstract
According to explosion dynamics and elastic wave theory,the models of particle vibration velocity for simultaneous blasting and millisecond blasting are built.In the models,influential factors such as delay interval and charge quantity,are considered.The calculated vibration velocity is compared with the field test results,which shows that the theoretical values are close to the experimental ones.Meanwhile,the particle vibration velocity decreases quickly with time due to the damping of rock mass and has a harmonic motion,and the particle vibration velocity of millisecond blasting has short interval.The superposition of particle vibration velocities may reduce vibration because of wave interference,or magnify the surrounding rock response to the blasting-induced vibration.关键词
Tunnel blasting/Millisecond blasting/Vibration velocity/SuperpositionKey words
Tunnel blasting/Millisecond blasting/Vibration velocity/Superposition分类
交通工程引用本文复制引用
ZHENG Jun-jie,LOU Xiao-ming,LUO De-pi..Vibration Superposition in Tunnel Blasting with Millisecond Delay[J].西南交通大学学报(英文版),2009,17(1):42-46,5.基金项目
s The Programme for New Century Excellent Talents in University (No.NCET-06-0649) and the Natural Science Foundation of Hubei Province(No.2005ABA303) （No.NCET-06-0649）
