Attenuation law of vibration induced by transient unloading during excavation of deep caverns

FAN Yong; LU Wen-bo; YANG Jian-hua; YAN Peng; CHEN Ming

doi:10.16285/j.rsm.2015.02.033

您当前的位置：

首页 >

文章列表页 >

Attenuation law of vibration induced by transient unloading during excavation of deep caverns

更新时间：2026-06-25

- Attenuation law of vibration induced by transient unloading during excavation of deep caverns
- Vol. 36, Issue 2, Pages: 541-549(2015)
- 作者机构：
  
  1. 武汉大学水资源与水电工程科学国家重点实验室,湖北,武汉,430072
  2. 武汉大学水工岩石力学教育部重点实验室,湖北,武汉,430072
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2015.02.033
  CLC： O383.1
- Online First：13 June 2018，
  
  Published：2015
- 稿件说明：
移动端阅览
FAN Yong, LU Wen-bo, YANG Jian-hua, et al. Attenuation law of vibration induced by transient unloading during excavation of deep caverns[J]. 2015, 36(2): 541-549.
DOI：

FAN Yong, LU Wen-bo, YANG Jian-hua, et al. Attenuation law of vibration induced by transient unloading during excavation of deep caverns[J]. 2015, 36(2): 541-549. DOI： 10.16285/j.rsm.2015.02.033.

摘要

深埋洞室爆破开挖过程中围岩初始地应力的瞬态卸荷会诱发振动。针对圆形隧洞开挖，分析了地应力瞬态卸荷过程中围岩应变能、动能、径向应力做功3者之间的平衡机制，并采用量纲分析，建立了基于开挖岩体应变能的瞬态卸荷诱发振动衰减公式。结合锦屏二级引水隧洞和瀑布沟地下主厂房爆破开挖实例，开展了瞬态卸荷诱发振动的识别分离，并分析了诱发振动的衰减规律。研究表明：地应力瞬态卸荷诱发振动的峰值与被开挖岩体应变能密度的二次方根成正比，且开挖卸荷体积越大，诱发振动越强烈；与Lu-Hustrulid衰减公式相比，新衰减公式应用范围更广，使用精度更高。

Abstract

During drilling and blasting excavations of deep caverns

the transient unloading of in-situ stress on the excavation boundary can induce vibrations in surrounding rock mass. For circular tunnel excavation

the balance mechanism of strain energy

kinetic energy and work done by radical stress during the process of the transient unloading of in-situ stress is analyzed

then a new attenuation formula is established to analyze the attenuation law of vibrations induced by the transient unloading of in-situ stress based on the strain energy of excavated rock mass with the tool of unit analysis. Case studies of Jinping II and Pubugou hydropower stations are presented to show how to identify and separate the vibrations induced by the transient unloading of in-situ stress from the monitored vibration signals. Studies indicate that the amplitudes of vibrations induced by the transient unloading of in-situ stress are proportional to the square root of strain energy density of excavated rock mass

and the bigger volume of excavated rock mass is

the intenser vibrations are induced by the transient unloading of in-situ stress. Compared with the existing attenuation formula proposed by Lu and Hustrulid

the new attenuation formula has a wider range of application and higher precision.

关键词

Keywords

references

Views

606

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Study of blasting vibration and deformation control for metro construction beneath existing metro tunnel in short distance

A new visco-elastoplastic creep constitutive model based on strain energy theory

Characteristic study of surrounding rock mass deformation considering accumulative damage effect

Properties of excavation damaged zone under blasting load in deep tunnels

Accumulated damage in surrounding rocks due to repeated blasting loads during blasting excavation of tunnels

Related Author

SUN Guo-fu

LEI Gang

LI Ke-xian

LI Shu-cai

WANG Wen-wu

ZHANG Bing

SHEN Cai-hua

LI Xin-ping

Related Institution

Beijing Urban Construction Design & Development Group Company Limited

Research Center of Geotechnical & Structural Engineering, Shandong University

State Key Laboratory of Geomechanics and Deep Underground Engineering, China University of Mining and Technology

College of Civil and Transportation Engineering, Hohai University

Power Construction Corporation of China

AI问答

⁰