figshare
Browse

File(s) under permanent embargo

Stress evolution of rock bolt elements in intersecting joints in rock masses

Version 2 2024-06-02, 14:00
Version 1 2020-01-30, 09:59
conference contribution
posted on 2015-01-01, 00:00 authored by M Barzegar, Saba Gharehdash
Computer modeling can be used to explore and gain new insights into the impacts of rock bolt intersecting joints in rock masses, and to estimate the effectiveness of the rock reinforcement system. In order to achieve this goal, numerical simulation was performed using FLAC3D to investigate the stress evolution in the rock bolts. The coupling algorithm is based on the analytically-derived interface behavior between a rock bolt and the rock material for grouted rock bolts. The shear force generated by slippage along the interface is assumed to have a linear relationship with respect to the relative slipping distance between the rock bolt and the rock. The linear elastic criterion is applied to determine the material behavior of rock bolts before the axial stress reaches the yield value. The pullout tests are simulated to verify the coupling algorithm and the effects of the proposed rock bolt elements. The simulation results show that the proposed rock bolt models can predict the shear forces and axial loading along the rock bolts. For the rock bolts observed in this study, the max axial force was within the design limit of the bolts, thus the support design was shown to be acceptable.

History

Event

American Rock Mechanics Association. Symposium (49th : 2015 : San Francisco, Calif.)

Volume

3

Pagination

2333 - 2338

Publisher

ARMA

Location

San Fransisco, Calif.

Place of publication

[Alexandria, Va.]

Start date

2015-06-28

End date

2015-07-01

ISBN-13

9781510810518

Language

eng

Publication classification

E1.1 Full written paper - refereed

Title of proceedings

Proceedings of the 49th US Rock Mechanics/Geomechanics Symposium 2015

Usage metrics

    Research Publications

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC