摘要
为科学准确判定岩石高边坡开挖爆破振动的概率分布形式,为岩石高边坡爆破振动幅值和频率的不确定性预测提供科学理论基础,以白鹤滩水电站右岸坝肩岩石高边坡开挖工程为研究背景,对典型开挖程序和爆破方案下的岩石高边坡爆破振动幅值和主频实测数据进行了概率统计分析,研究了岩石高边坡开挖爆破振动幅值和主频的概率分布及其主要特征。研究结果表明:正态分布和Gamma分布模型对岩石高边坡开挖预裂和主爆破质点峰值振速概率分布的拟合效果均较好,岩石高边坡开挖预裂和主爆破质点峰值振速的概率分布较好地服从正态或Gamma分布;Gamma分布模型相较于正态分布模型对岩石高边坡开挖预裂和主爆破振动视主频的概率分布存在明显拟合优势,岩石高边坡开挖预裂和主爆破振动视主频概率分布较好地服从Gamma分布。岩石高边坡预裂爆破质点峰值振速和视主频的平均值大于对应主爆破质点峰值振速和视主频的平均值,预裂爆破质点峰值振速和视主频下四分位~上四分位量值范围分别为5.4~11.6 cm/s和36.7~97.6 Hz,主爆破质点峰值振速和视主频下四分位~上四分位量值范围分别为3.8~8.9 cm/s和26.7~97.6 Hz。研究结果显示,经常采用的正态分布并不一定是岩石高边坡开挖爆破振动幅值或主频的最佳概率分布形式,其他典型岩石高边坡工程爆破振动幅值和主频的概率分布有待进一步研究。
Determining the probability distribution of blasting vibrations induced by high rock slope excavation can provide a theoretical basis for predicting the amplitude and frequency of these vibrations with uncertainty.This study focuses on the right bank dam abutment high rock slope excavation at the Baihetan hydropower station.It investigates recorded blasting vibration data during high rock slope excavation using typical pro-cedures and blasting schemes through probability statistics.In addition,the research explores the probability distribution and main characteristics of the recorded blasting vibration amplitude and dominant frequency.The findings indicate that the normal and Gamma distribution models are ef-fectively employed to fit the peak particle velocity(PPV)probability distributions of presplit and production blasting during high rock slope ex-cavation.The PPV probability distributions of the presplit and production blasting conform to either the normal or Gamma distribution.Com-pared to the normal distribution model,the Gamma distribution model more effectively fits the apparent dominant frequency probability distribu-tion of presplit and production blasting vibration during high rock slope excavation.The apparent dominant frequency probability distribution of the presplit and production blasting vibration better follows the Gamma distribution.The average values of PPV and apparent dominant fre-quency of presplit blasting are greater than those of corresponding production blasting.The lower to upper quartile PPV ranges of the presplit and production blasting are 5.4 to 11.6 cm/s and 3.8 to 8.9 cm/s,respectively.The lower to upper quartile apparent frequency ranges of the presplit and production blasting are 36.7 to 97.6 Hz and 26.7 to 97.6 Hz,respectively.The results demonstrate that the commonly used normal distribu-tion is not necessarily the best probability distribution for blasting vibration.The probability distribution of blasting vibration amplitude and dom-inant frequency in other typical high roc
作者
孙鹏昌
杨招伟
卢文波
孟海利
薛里
SUN Pengchang;YANG Zhaowei;LU Wenbo;MENG Haili;XUE Li(Railway Eng.Research Inst.,China Academy of Railway Sciences Co.,Ltd.,Beijing 100081,China;Changjiang River Scientific Research Inst.,Wuhan 430019,China;State Key Lab.of Water Resources Eng.and Management,Wuhan Univ.,Wuhan 430072,China)
出处
《工程科学与技术》
EI
CAS
CSCD
北大核心
2024年第3期179-188,共10页
Advanced Engineering Sciences
基金
中国铁道科学研究院集团有限公司重点课题(2022YJ087)
国家自然科学基金青年基金项目(52109148)
北京市科协青年人才托举工程项目(BYESS2022219)。
关键词
白鹤滩水电站
岩石高边坡
爆破振动
质点峰值振速
视主频
概率分布
Baihetan hydropower station
high rock slope
blasting vibration
peak particle velocity
dominant frequency
probability distribution
