高压物理学报2025，Vol.39Issue(8)：114-127,14.DOI:10.11858/gywlxb.20240922
山岭公路隧道多级别围岩爆破振动传播规律及预测
Propagation Laws and Prediction of Blasting Vibration in Mountain Highway Tunnels with Multi-Level Surrounding Rock
摘要
Abstract
To achieve vibration control in tunnel blasting under complex geological conditions,clarifying the propagation laws of blasting velocities and accurately predicting blasting velocities are crucial aspects of safe blasting construction.Based on the multi-level surrounding rock and multi-scheme blasting engineering of the Houyu tunnel on the expressway,LS-DYNA was used to analyze the vibration attenuation characteris-tics of multi-level surrounding rock under various blasting methods.Field tests were conducted to validate the rationality of the numerical simulations.Finally,a velocity prediction model considering the influence of elevation differences was established by dimensional theory.The results show that as the blast center distance increases,the resultant velocity decays rapidly at first and then more slowly.The velocity of the surrounding rock above the tunnel in the excavated area is greater than that in the unexcavated area.There is a negative correlation between the strength grade of rock and the vibration velocity.The resultant velocities of the surrounding rock,from largest to smallest,are as follows:the reserved core soil method for step excavation,the single side drift method with right upper bench,and the single side drift method with left side drift.The attenuation rates of the resultant velocities,from largest to smallest,are as follows:the single side drift method with right upper bench,the reserved core soil method for step excavation,and the single side drift method with left side drift.When using the reserved core soil method for step excavation,the minimum safety distances for buried pipelines,building clusters,temples,and oil depots are 95,81,447 and 73 m,respectively.When using the single side drift method,the minimum safety distances for buried pipelines,building clusters,temples,and oil depots are 56,72,327 and 71 m,respectively.关键词
隧道爆破/爆破方式/围岩级别/振动衰减/振速预测Key words
tunnel blasting/blasting method/surrounding rock level/vibration attenuation/vibration speed prediction分类
交通工程引用本文复制引用
黄剑,蒋楠,杨玉民..山岭公路隧道多级别围岩爆破振动传播规律及预测[J].高压物理学报,2025,39(8):114-127,14.基金项目
国家自然科学基金(42102329,52478525) （42102329,52478525）
湖北省自然科学基金杰出青年项目(2024AFA092) （2024AFA092）
江汉大学省部共建精细爆破国家重点实验室-江汉大学爆破工程湖北省重点实验室联合开放基金(PBSKL2023A1) （PBSKL2023A1）
