Paper Title:
Blast-Induced Cumulative Effects in Surrounding Rock of Largespan Tunnel under Multiple Blasts
  Abstract

The blasting vibration derived from multiple blasts and its effects on surrounding rock in a longspan tunnel will probably give rise to cumulative damage of surrounding rock, and weaken surrounding rock’s stability. Blastmate III, made by the Canadian company Instantel, is utilized to monitor the vibration signals from multiple blasts. Blasting vibration decay law and allowed safety distance of blasting are calculated by using Sadaovsk formula. Then, cumulative effects are analyzed by Hilbert-Huang Transform method as well as consequential instantaneous energy spectrum, and UTEP is presented to indicate the change of cumulative effects and damage in surrouding rock. The research shows that during the progress of damage evolution, “strengthening” and” deteriorating” may alternately appear several times. This is a zigzag reciprocating process in damage evolution of surrounding rock.

  Info
Periodical
Advanced Materials Research (Volumes 378-379)
Chapter
Chapter 4: Geotechnical and Building Materials
Edited by
Brendan Gan, Yu Gan and Y. Yu
Pages
498-501
DOI
10.4028/www.scientific.net/AMR.378-379.498
Citation
L. F. Li, X. B. Li, H. P. Ma, J. F. Xie, "Blast-Induced Cumulative Effects in Surrounding Rock of Largespan Tunnel under Multiple Blasts", Advanced Materials Research, Vols. 378-379, pp. 498-501, 2012
Online since
October 2011
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Price
$32.00
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