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Shear creep of discontinuities in hard rock surrounding deep excavations
| Content Provider | Scilit |
|---|---|
| Author | Malan, D. F. Drescher, K. Vogler, U. W. |
| Copyright Year | 2018 |
| Description | Time-dependent deformations around deep level mines in hard rock occur at rates well in excess of those expected from creep of the solid rock mass. It appears that the time-dependent deformation is controlled by the rheology of the fracture zone. This paper presents the results of a laboratory investigation of the shear creep of discontinuities. It was found that discontinuities with gouge infilling undergo noticeable shear creep when subjected to stress below the shear strength. The steady-state creep rate depends on the shear stress/shear strength ratio, the absolute stress magnitudes and gouge thickness. In comparison, the creep rate of mining induced extensile fractures in hard rock is negligible. Finally, a rheological model to simulate the behaviour of the discontinuities with infilling is proposed. Book Name: Mechanics of Jointed and Faulted Rock |
| Related Links | https://content.taylorfrancis.com/books/download?dac=C2010-0-32596-0&isbn=9780203747810&doi=10.1201/9780203747810-72&format=pdf |
| Ending Page | 478 |
| Page Count | 6 |
| Starting Page | 473 |
| DOI | 10.1201/9780203747810-72 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2018-04-27 |
| Access Restriction | Open |
| Subject Keyword | Book Name: Mechanics of Jointed and Faulted Rock Mining and Mineral Processing Creep Shear Stress Discontinuities Hard Rock Deep Model Gouge |
| Content Type | Text |
| Resource Type | Chapter |
