Paper Title:
An Experimental Study of Excavation Damaged Zone in Anisotropic Rock
  Abstract

When a tunnel or an underground structure is excavated in rock mass, rock disturbed or damaged zone (EDZ) is formed around the excavation due to the stress concentration resulting from stress redistribution. Recent studies on the rock EDZ revealed it’s important to structural stability around underground opening. In this study, the fracture and damage mechanisms of rock induced by the accumulation of microcracks were investigated by AE tests. The results of the experiments showed that tensile failure was the major microscopic failure mechanism of rock in excavation damaged and disturbed zone. The expression of the damage magnitudes in each AE source leads to accurate prediction of macroscopic failure mechanisms. In addition, the orientation of the macroscopic failure plane could be estimated by the orientational distribution of microcracks.

  Info
Periodical
Key Engineering Materials (Volumes 353-358)
Edited by
Yu Zhou, Shan-Tung Tu and Xishan Xie
Pages
905-908
DOI
10.4028/www.scientific.net/KEM.353-358.905
Citation
S. H. Wang, H. W. Lee, X. D. Zhao, A. Bashir, "An Experimental Study of Excavation Damaged Zone in Anisotropic Rock", Key Engineering Materials, Vols. 353-358, pp. 905-908, 2007
Online since
September 2007
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Price
$32.00
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