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

Shear behavior of planar unfilled rock discontinuities with reference to surface morphology under constant normal load

Authors
Singh Hemant Kumar, Basu Arindam
Corresponding Author
Singh Hemant Kumar
Available Online November 2016.
DOI
https://doi.org/10.2991/rare-16.2016.19How to use a DOI?
Keywords
shear behavior of discontinuity; surface morphology; joint roughness coefficient; peak shear strength; joint in granite; sandstone bedding plane
Abstract
Stability of rock masses at shallow depth is often controlled by shear behavior of discontinuities. This is an important issue in an engineering environment as well as from societal point of view. With regard to shear behavior assessment through laboratory investigation, direct shear test under constant normal load were carried out on two types of rock such that joint in granite and sandstone bedding planes. From each rock types three samples of similar joint roughness coefficient (varied between 0.86-1.52) were selected for investigation. It should be noted that same sample was tested thrice at three different consecutively increasing low normal stresses (ranges: 0.22-0.23 MPa, 0.45-0.46 MPa and 0.69-0.70 MPa respectively). At low normal stresses (0.22-0.23 MPa), three types of shear behavioral characteristics of natural rock discontinuity (i.e. for both types of rock) were observed whereas at relatively higher normal stresses (0.45-0.70 MPa), shear behaviors along these discontinuities plane were found to be broadly similar. In general, the differences of peak shear strengths and peak shear displacement increases as applied normal stress increases with subsequent stages of shearing. The probable reason behind individuality of results was explained
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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-16.2016.19How 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  - Singh Hemant Kumar
AU  - Basu Arindam
PY  - 2016/11
DA  - 2016/11
TI  - Shear behavior of planar unfilled rock discontinuities with reference to surface morphology under constant normal load
BT  - Recent Advances in Rock Engineering (RARE 2016)
PB  - Atlantis Press
SN  - 2352-5401
UR  - https://doi.org/10.2991/rare-16.2016.19
DO  - https://doi.org/10.2991/rare-16.2016.19
ID  - HemantKumar2016/11
ER  -