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The relationship between void ratio and shear wave velocity of gold tailings
Dissertation (MEng)--University of Pretoria, 2006.
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| Format: | Thesis |
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University of Pretoria
2013
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| _version_ | 1867613677226557440 |
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| access_status_str | Open Access |
| author2 | Heymann, Gerhard |
| author_browse | Heymann, Gerhard |
| author_facet | Heymann, Gerhard |
| collection | Thesis |
| dc_rights_str_mv | © 2004, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MEng)--University of Pretoria, 2006. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/25319 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:39:56.908Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/25319 The relationship between void ratio and shear wave velocity of gold tailings Heymann, Gerhard nchang@mweb.co.za Chang, Hsin-Pei Nicol Void ratio Bender elements Gold tailings Silts Seismic methods Liquefaction Shear wave velocity UCTD Dissertation (MEng)--University of Pretoria, 2006. South Africa, as one of the world’s largest gold producing countries, also generates large amounts of tailings. These tailings are disposed in tailings dams, which pose great threat to the environment in the case of failure, in particular, liquefaction. In order to evaluate the potential of liquefaction, the void ratio of the tailings is required and is often impossible to obtain. Seismic methods allow an indirect method to estimate void ratio of in situ deposits of which tailings are examples of. Currently, the use of seismic methods to estimate void ratio of tailings rely on shear wave velocity – void ratio relationships derived for sands. It is thus uncertain whether this relationship holds for gold tailings, which is classified as a sandy silt or silt. The measurement of shear wave velocity of tailings is done in the laboratory using a triaxial apparatus modified to accommodate bender element. Shear wave velocities are measured using wide square pulses and continuous sinusoidal waves. The results show that there is a near linear relationship between void ratio and shear wave velocity normalized against effective stress. The position of this relationship lies below the previously published results for sands. Shear wave velocity of gold tailings is more sensitive to changes in effective stress than changes in void ratio or over-consolidation ratio. Furthermore, using phase sensitive detection of continuous waves, we can conclude that shear wave velocity of gold tailings is also frequency dependent. Civil Engineering MEng Unrestricted 2013-09-06T20:38:44Z 2005-06-07 2013-09-06T20:38:44Z 2004-09-15 2006-06-07 2005-06-07 Dissertation Chang, HN 2006-06-07, The relationship between void ratio and shear wave velocity of gold tailings, MEng Dissertation, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/25319> http://hdl.handle.net/2263/25319 http://upetd.up.ac.za/thesis/available/etd-06072005-141809/ © 2004, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf application/pdf application/pdf application/pdf application/pdf University of Pretoria |
| spellingShingle | Void ratio Bender elements Gold tailings Silts Seismic methods Liquefaction Shear wave velocity UCTD The relationship between void ratio and shear wave velocity of gold tailings |
| title | The relationship between void ratio and shear wave velocity of gold tailings |
| title_full | The relationship between void ratio and shear wave velocity of gold tailings |
| title_fullStr | The relationship between void ratio and shear wave velocity of gold tailings |
| title_full_unstemmed | The relationship between void ratio and shear wave velocity of gold tailings |
| title_short | The relationship between void ratio and shear wave velocity of gold tailings |
| title_sort | relationship between void ratio and shear wave velocity of gold tailings |
| topic | Void ratio Bender elements Gold tailings Silts Seismic methods Liquefaction Shear wave velocity UCTD |
| url | http://hdl.handle.net/2263/25319 http://upetd.up.ac.za/thesis/available/etd-06072005-141809/ |