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3D instability analysis of an underground geological repository-an Indian case study

DSpace at IIT Bombay

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Title 3D instability analysis of an underground geological repository-an Indian case study
 
Creator VERMA, AK
BAJPAI, RK
SINGH, TN
NARAYAN, PK
DUTT, A
 
Subject FLAC(3D)
Spent nuclear fuel
Damage number
Principal stress
 
Description Conceptual geological repositories are generally used for disposing spent nuclear wastes containing both high and low level of nuclear radiation and heat. Due to its long-lasting effect, it is imperative to analyze its long-term effect on the surrounding rock. Before analyzing radiation and thermal effect, it is important to have structurally stable cavern because designing an opening in rock is a more difficult problem than designing the structure made of steel. Underground rocks are under stress because of the weight of the overlying rock, and in addition, an underground opening will produce a stress concentration and stress relaxation in the surrounding rock. If the induced stress in the surrounding rock exceeds its strength, the opening will fail either by fracturing or by deforming more than the tolerable limit. In this paper, the stability of four different shapes of excavation has been examined for conceptual geological repositories in Indian context. This has been done using equivalent continuum numerical model which has been incorporated in the commercial finite difference code-FLAC-3D. Effects of opening shapes on stress distribution, subsidence of crown and side wall, and their stability have been analyzed and discussed. The validation of FLAC(3D) software for its applicability in conceptual underground geological repositories has been done with a published literature.
 
Publisher SPRINGER HEIDELBERG
 
Date 2012-06-26T06:04:05Z
2012-06-26T06:04:05Z
2011
 
Type Article
 
Identifier ARABIAN JOURNAL OF GEOSCIENCES,4(7-8)1173-1188
1866-7511
http://dx.doi.org/10.1007/s12517-010-0131-4
http://dspace.library.iitb.ac.in/jspui/handle/100/13999
 
Language English