Shear behavior of clayey infilled rock joints having triangular and sinusoidal asperities

Mirzaghorbanali, Ali ORCID: https://orcid.org/0000-0002-7967-9233 and Ghimire, Basanta and Rastegarmanesh, Ashkan and Nourizadeh, Hadi and McDougall, Kevin ORCID: https://orcid.org/0000-0001-6088-1004 and Aziz, Naj (2022) Shear behavior of clayey infilled rock joints having triangular and sinusoidal asperities. In: 2022 Resource Operators' Conference, Feb 2022, University of Wollongong and University of Southern Queensland, Australia.


Abstract

Rock joints govern an important role in the overall stability of rock slope which may be filled with infill material due to transported materials with water, weathering as well as joint shearing. There are two methods of testing rock joint shear behavior, one is Constant Normal Load (CNL), and another is Constant Normal Stiffness (CNS). The CNL is found suitable in slope stability where sliding mass can move freely without any restriction while CNS is suitable in underground excavation, pile socketed in rock and reinforced rock slope where the stiffness of boundary restricts dilation during the shearing process. This study investigates the shear behavior of clay infilled rock joints with triangular and sinusoidal asperities under CNL conditions. The pair of triangular and sinusoidal asperities is Type 1T, Type 2T and Type 1S, Type 2S respectively where prefix represent asperity height and suffix represent the type of asperity. Joint Roughness Coefficient (JRC) obtained from back-calculation of Barton equation using experimental data is 7, 9, 9 and 12 for Type 1T, Type 2T, Type 1S and Type 2S respectively. The direct shear test was performed on two campaigns, among these, was one of understanding shear behavior of infilled rock joints under various normal loads and another was the shear behavior of infill rock joints under various infill thicknesses. During the first campaign shear behavior of clayey infilled rock joint fewer than three different normal loads were tested. Likewise, in the second campaign shear behavior of clayey infill rock joint under three infill thickness were performed. Overall this study provides better insights into shear behavior clayey infilled rock joints having different joint morphology.


Statistics for USQ ePrint 47570
Statistics for this ePrint Item
Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current – Faculty of Health, Engineering and Sciences - School of Engineering (1 Jan 2022 -)
Faculty/School / Institute/Centre: Current – Faculty of Health, Engineering and Sciences - School of Engineering (1 Jan 2022 -)
Date Deposited: 19 Apr 2022 02:09
Last Modified: 19 Apr 2022 02:55
Uncontrolled Keywords: clayey; infilled rock joints; asperities
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400502 Civil geotechnical engineering
40 ENGINEERING > 4019 Resources engineering and extractive metallurgy > 401902 Geomechanics and resources geotechnical engineering
40 ENGINEERING > 4019 Resources engineering and extractive metallurgy > 401905 Mining engineering
URI: http://eprints.usq.edu.au/id/eprint/47570

Actions (login required)

View Item Archive Repository Staff Only