›› 2015, Vol. 36 ›› Issue (2): 541-549.doi: 10.16285/j.rsm.2015.02.033

• Geotechnical Engineering • Previous Articles     Next Articles

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

FAN Yong1, 2, LU Wen-bo1, 2, YANG Jian-hua1, 2, YAN Peng1, 2, CHEN Ming1, 2   

  1. 1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, China; 2. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering, Ministry of Education, Wuhan University, Wuhan, Hubei 430072, China
  • Received:2013-10-28 Online:2015-02-11 Published:2018-06-13

PDF (Chinese)

1606

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.

Key words: blasting excavation, transient unloading, induced vibration, strain energy, attenuation formula

CLC Number: 

  • O 383.1
[1] LIANG Ke, CHEN Guo-xing, LIU Kang, WANG Yan-zhen, . Degradation properties and prediction model of maximum shear modulus of saturated coral sand under cyclic triaxial loading [J]. Rock and Soil Mechanics, 2020, 41(2): 601-611.
[2] ZHANG Ping, YANG Chun-he, WANG Hu, GUO Yin-tong, XU Feng, HOU Zhen-kun，. Stress-strain characteristics and anisotropy energy of shale under uniaxial compression [J]. , 2018, 39(6): 2106-2114.
[3] XIE Xue-bin, LI Jian-kun, DONG Xian-jiu, TIAN Ting-yu，. Stability analysis of cemented filling body and roof [J]. , 2018, 39(11): 4183-4190.
[4] GUO Jian-qiang, LIU Xin-rong, ZHAO Qing，. Theoretical research on rock unloading mechanical characteristics [J]. , 2017, 38(S2): 123-130.
[5] XIE Can, LI Shu-chen, PING Yang, LI Jing-long, LI Shu-cai，. Study of nonlinear damage characteristics and numerical simulation of post-peak fractured rock mass [J]. , 2017, 38(7): 2128-2136.
[6] DU Hai-min, MA Wei, ZHANG Shu-juan, ZHOU Zhi-wei. Effects of confining pressure and water content on failure strain energy density for frozen silty sands [J]. , 2017, 38(7): 1943-1950.
[7] WANG Hong, YANG Tian-hong, LIU Hong-lei, ZHAO Yong-chuan, DENG Wen-Xen, HOU Xian-gang，. Mechanical properties and energy evolution of dry and saturated sandstones under cyclic loading [J]. , 2017, 38(6): 1600-1608.
[8] FAN Yong, LU Wen-bo, ZHOU Yi-hong, LENG Zhen-dong, YAN Peng，. A model for predicting vibration peak induced by blasting excavation under high in-situ stress [J]. , 2017, 38(4): 1082-1088.
[9] GUO Jian-qiang , LIU Xin-rong, WANG Jun-bao, HUANG Zhi-hong，. Strength criterion of rock based on elastic strain energy [J]. , 2016, 37(S2): 129-136.
[10] ZHANG Chuan-qing, YU Jin, CHEN Jun, LU Jing-jing, ZHOU Hui， . Evaluation method for potential rockburst in underground engineering [J]. , 2016, 37(S1): 341-349.
[11] YANG Jian-ping, CHEN Wei-zhong, YANG Dian-sen, TIAN Hong-ming,. A method for estimating equivalent elastic moduli of fractured rock masses based on elastic strain energy [J]. , 2016, 37(8): 2159-2164.
[12] YAN Peng , ZHAO Zhen-guo , LU Wen-bo , CHEN Ming , ZHOU Chuang-bing , . Factors influencing vibration effects induced by in-situ stress transient unloading of deep rock mass [J]. , 2016, 37(2): 545-553.
[13] LIU Dong, GAO Wen-xue, SUN Bao-ping, LIU Dan-hui, ZHOU Shi-sheng,. Numerical simulation of blasting vibration on existing tunnel extension [J]. , 2016, 37(10): 3011-3016.
[14] WANG Han-peng , XUE Jun-hua , LI Jian-ming , ZHANG Qing-he , MA Qin-yong,. Simulation of dynamic response of surrounding rock under the tunneling-induced unloading [J]. , 2015, 36(5): 1481-1487.
[15] LI Shu-cai , LI Ke-xian , LEI Gang , SUN Guo-fu，. Study of blasting vibration and deformation control for metro construction beneath existing metro tunnel in short distance [J]. , 2014, 35(S2): 284-289.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] WANG Gang, LI Shu-cai, WANG Ming-bin. Study of stability of anchoring jointed rockmass under seepage pressure[J]. , 2009, 30(9): 2843 -2849 .
[2] LI Yuan-heng，CHEN Guo-liang，LIU Xiu-guo，SHANG Jian-ga. The topology-oriented method of building 3D geological block model based on primary TIN[J]. , 2010, 31(6): 1902 -1906 .
[3] LIU En-long. Breakage mechanics for geomaterials: Breakage mechanism of structural blocks and binary-medium model[J]. , 2010, 31(S1): 13 -22 .
[4] YANG Jian-min, ZHENG Gang. Classification of seepage failures and opinion to formula for check bursting instability in dewatering[J]. , 2009, 30(1): 261 -264 .
[5] ZHANG Bo, Li Shu-cai, YANG Xue-ying, WANG Xi-ping. Research on seismic wave input with three-dimensional viscoelastic artificial boundary[J]. , 2009, 30(3): 774 -778 .
[6] ZHOU Hua，WANG Guo-jin1,，FU Shao-jun，ZOU Li-chun，CHEN Sheng-hong. Finite element analysis of foundation unloading and relaxation effects of Xiaowan Arch Dam[J]. , 2009, 30(4): 1175 -1180 .
[7] YE Fei, ZHU He-hua, HE Chuan. Back-filled grouts diffusion model and its pressure to segments of shield tunnel[J]. , 2009, 30(5): 1307 -1312 .
[8] LUO Qiang , WANG Zhong-tao , LUAN Mao-tian , YANG Yun-ming , CHEN Pei-zhen. Factors analysis of non-coaxial constitutive model’s application to numerical analysis of foundation bearing capacity[J]. , 2011, 32(S1): 732 -0737 .
[9] GONG Wei-ming, HUANG Ting, DAI Guo-liang. Experimental study of key parameters of high piled foundation for offshore wind turbine[J]. , 2011, 32(S2): 115 -121 .
[10] SONG Yi-min , JIANG Yao-dong , MA Shao-peng , YANG Xiao-bin , ZHAO Tong-bin . Evolution of deformation fields and energy in whole process of rock failure[J]. , 2012, 33(5): 1352 -1356 .
Copyright © Rock and Soil Mechanics, All Rights Reserved.
Tel: 027-87198484, 87199252, 87199253, 87198752　E-mail: ytlx@whrsm.ac.cn
Powered by Beijing Magtech Co. Ltd