工程科学与技术2024，Vol.56Issue(3)：179-188,10.DOI:10.12454/j.jsuese.202201386
白鹤滩水电站坝肩边坡开挖爆破振动概率分布研究
Probability Distribution of Blasting Vibration Induced by Right Bank Dam Abutment High Rock Slope Excavation in Baihetan Hydropower Station
摘要
Abstract
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 rock slope excavations needs further examination.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Key words
Baihetan hydropower station/high rock slope/blasting vibration/peak particle velocity/dominant frequency/probability distribution分类
建筑与水利引用本文复制引用
孙鹏昌,杨招伟,卢文波,孟海利,薛里..白鹤滩水电站坝肩边坡开挖爆破振动概率分布研究[J].工程科学与技术,2024,56(3):179-188,10.基金项目
中国铁道科学研究院集团有限公司重点课题(2022YJ087) （2022YJ087）
国家自然科学基金青年基金项目(52109148) （52109148）
北京市科协青年人才托举工程项目(BYESS2022219) （BYESS2022219）
