Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Particle size segregation and excess pore water pressure with respect to rate of rise of tailings dams
Thesis (PhD)--University of Pretoria, 2016.
Saved in:
| Other Authors: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
University of Pretoria
2016
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613564137635840 |
|---|---|
| access_status_str | Open Access |
| author2 | Heymann, Gerhard |
| author_browse | Heymann, Gerhard |
| author_facet | Heymann, Gerhard |
| collection | Thesis |
| dc_rights_str_mv | © 2016 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 | Thesis (PhD)--University of Pretoria, 2016. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/57486 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:38:08.659Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| 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:2263/57486 Particle size segregation and excess pore water pressure with respect to rate of rise of tailings dams Heymann, Gerhard u28554681@tuks.co.za Rust, Eben Lebitsa, Gabatsoswe UCTD Engineering, built environment and information technology theses SDG-06 SDG-06: Clean water and sanitation Engineering, built environment and information technology theses SDG-09 SDG-09: Industry, innovation and infrastructure Engineering, built environment and information technology theses SDG-11 SDG-11: Sustainable cities and communities Engineering, built environment and information technology theses SDG-12 SDG-12: Responsible consumption and production Thesis (PhD)--University of Pretoria, 2016. Gold tailings were deposited in thick lifts at full depth where tailings slurry was deposited to fill up the settling column in one lift within the shortest time possible (2 minutes) and thin lifts (660mm to 580mm) under simulated rates of rise of 20m/yr and 10m/yr in the laboratory using instrumented settling column apparatus. Rate of rise (RoR) was taken as the vertical increase in height of settled tailings over a given period of time expressed in metres per year. The deposited tailings segregated along the height of settling columns depicting a height profile ranging from fine grained to coarse grained particles from the top to the bottom of the settling columns. Tailings permeability values of the segregated tailings profiles increased with decreasing settling column height. Scanning electron microscope micrographs based fabric, particle size gradations, saturated vertical permeability and excess pore water pressures correlated well with segregated tailings profiles. Low magnitude excess pore water pressures in the range of 6kPa maximum were recorded. Full depth deposition yielded the highest values of excess pore water pressures followed by the excess pore water pressures for 20m/yr RoR at 50% of the full depth deposition magnitudes, with the least excess pore water pressures generated for the 10m/yr RoR which were 30% of the full depth deposition excess pore water pressure magnitudes. 90% of the excess pore water pressures dissipated during the sedimentation phase and coincided with the occurrence of the bulk of the tailings settlement. The remaining 10% of excess pore water pressures took a disproportionately longer period of time to dissipate and were resurgent with any disturbances. tm2016 Civil Engineering PhD Unrestricted 2016-10-27T07:28:31Z 2016-10-27T07:28:31Z 2016-09-01 2016 Thesis Lebitsa, G 2016, Particle size segregation and excess pore water pressure with respect to rate of rise of tailings dams, PhD Thesis, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/57486> S2016 http://hdl.handle.net/2263/57486 en © 2016 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 University of Pretoria |
| spellingShingle | UCTD Engineering, built environment and information technology theses SDG-06 SDG-06: Clean water and sanitation Engineering, built environment and information technology theses SDG-09 SDG-09: Industry, innovation and infrastructure Engineering, built environment and information technology theses SDG-11 SDG-11: Sustainable cities and communities Engineering, built environment and information technology theses SDG-12 SDG-12: Responsible consumption and production Particle size segregation and excess pore water pressure with respect to rate of rise of tailings dams |
| title | Particle size segregation and excess pore water pressure with respect to rate of rise of tailings dams |
| title_full | Particle size segregation and excess pore water pressure with respect to rate of rise of tailings dams |
| title_fullStr | Particle size segregation and excess pore water pressure with respect to rate of rise of tailings dams |
| title_full_unstemmed | Particle size segregation and excess pore water pressure with respect to rate of rise of tailings dams |
| title_short | Particle size segregation and excess pore water pressure with respect to rate of rise of tailings dams |
| title_sort | particle size segregation and excess pore water pressure with respect to rate of rise of tailings dams |
| topic | UCTD Engineering, built environment and information technology theses SDG-06 SDG-06: Clean water and sanitation Engineering, built environment and information technology theses SDG-09 SDG-09: Industry, innovation and infrastructure Engineering, built environment and information technology theses SDG-11 SDG-11: Sustainable cities and communities Engineering, built environment and information technology theses SDG-12 SDG-12: Responsible consumption and production |
| url | http://hdl.handle.net/2263/57486 |