Proceedings of the conference on Recent Advances in Rock Engineering (RARE 2016)

Stability of pillar between two caverns with dyke intrusion - A case study

Authors
P Nareen, M. Mahalakshmi, S. Shasank, K John, B. Abhishek
Corresponding Author
P Nareen
Available Online November 2016.
DOI
https://doi.org/10.2991/rare-16.2016.37How to use a DOI?
Keywords
Cavern; Dyke; Pillar; Support; FLAC 2D and In-situ stress
Abstract
This paper presents numerical analyses for the stability of a pillar between two caverns in an underground oil storage project. The geological condition of this pillar reveals two major lineaments (intrusive bodies) intersecting each other between two caverns, which results in dislocation of dykes and poor rock condition. Empirical and numerical approaches were used and compared in this study focusing on tunnel safety. Rock mass at the site was characterized using empirical method namely Rockmass Quality Q. The Q values were determined by using field data and the mechanical properties of intact rock samples were evaluated in the laboratory. The support systems were analyzed using software based on Finite Difference Method (FDM) method. The support requirements were proposed accordingly in terms of different rock mass classification systems. Four cross sections along the longitudinal profile with shifting of dyke locations were selected and analyzed. The analyses were carried out in FLAC 2D to study stress changes, deformation around cavern openings. The interfaces between the parent rock mass (Granitic Gneiss) and dyke (Dolerite) has taken onto account and modelled in order to analyze the interaction and the stability of the pillar between the two caverns
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This is an open access article distributed under the CC BY-NC license.

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Proceedings
Recent Advances in Rock Engineering (RARE 2016)
Part of series
Advances in Engineering Research
Publication Date
November 2016
ISBN
978-94-6252-260-2
ISSN
2352-5401
DOI
https://doi.org/10.2991/rare-16.2016.37How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - CONF
AU  - P Nareen
AU  - M. Mahalakshmi
AU  - S. Shasank
AU  - K John
AU  - B. Abhishek
PY  - 2016/11
DA  - 2016/11
TI  - Stability of pillar between two caverns with dyke intrusion - A case study
BT  - Recent Advances in Rock Engineering (RARE 2016)
PB  - Atlantis Press
SN  - 2352-5401
UR  - https://doi.org/10.2991/rare-16.2016.37
DO  - https://doi.org/10.2991/rare-16.2016.37
ID  - Nareen2016/11
ER  -