Discussion on blasting vibration monitoring for rock damage control in rock slope excavation

作     者：Yang Jianhua Cai Jiyong Yao Chi Zhang Xiaobo Liu Liansheng Yang Jianhua;Cai Jiyong;Yao Chi;Zhang Xiaobo;Liu Liansheng

作者机构：School of Civil Engineering and ArchitectureNanchang UniversityNanchang 30031China School of Resource and Environmental EngineeringJiangxi University of Science and TechnologyGanzhou 341000China 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2022年第21卷第1期

页      面：53-65页

核心收录：

学科分类：08[工学] 0815[工学-水利工程] 081503[工学-水工结构工程] 

基　　金：National Natural Science Foundation of China under Grant Nos.51969015 and U1765207 Jiangxi Provincial Natural Science Foundation under Grant Nos.20192ACB21019 and 20204BCJ23002 

主　　题：rock slope blasting excavation vibration rock damage 

摘      要：Drill and blast is a commonly used method for rock slope excavation in hydropower *** blasting excavation of rock slopes,far-field vibration monitoring on the first upper berm for statutory compliance is usually performed to control the blast-induced rock damage to the final slope *** this study,for the rock slope excavation in the Jinping-I hydropower station,the field vibration monitoring and acoustic testing are presented to investigate the vibration characteristics on the first upper berm and the damage depth in the current *** relationship between the PPV on the first upper berm and the PPV damage threshold on the damage zone boundary is also studied through three-dimensional FEM *** results show that on the first upper berm,the maximum vibration velocity component occurs in the vertical *** on the blasting damage zone boundary,the horizontal radial vibration velocity is the maximum *** the Jinping-I slope with a bench height of 30 m,the radial PPV on the inner side of the first upper berm is 2.06%of the PPV threshold on the damage zone *** ratio is increased as the bench height ***,the bench height of the rock slope is an important factor that cannot be ignored in determining the allowable vibration velocity for rock damage control.