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Quantification methods and management of hydrogeochemistry in decommissioned collieries of the Mpumalanga Coalfields
Thesis (PhD)--University of Pretoria, 2017.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2017
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| _version_ | 1867613672971436032 |
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| access_status_str | Open Access |
| author2 | Dippenaar, Matthys Alois |
| author_browse | Dippenaar, Matthys Alois |
| author_facet | Dippenaar, Matthys Alois |
| collection | Thesis |
| dc_rights_str_mv | © 2017 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, 2017. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/63215 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:39:52.674Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| 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:2263/63215 Quantification methods and management of hydrogeochemistry in decommissioned collieries of the Mpumalanga Coalfields Dippenaar, Matthys Alois altus@gptglobal.com Wolkersdorfer, Christian Huisamen, Altus UCTD Hydrogeochemistry Acid mine drainage Mpumalanga Coalfields Mine rehabilitation Geochemical modelling Natural and agricultural sciences theses SDG-06 Natural and agricultural sciences theses SDG-09 Natural and agricultural sciences theses SDG-12 Thesis (PhD)--University of Pretoria, 2017. Mine water chemistry and its evolution has been the focus of various studies. However, these studies were primarily based on data from underground mines, pit lakes and mining waste dumps. Backfilled opencast mines have received limited attention in this regard and were postulated to undergo an initial flush, in a similar fashion to underground mines. Previous work in the prediction of mine water quality focussed on the fitting of an idealised decay rate curve to existing mine water chemistry data, analytical calculations, simplified geochemical modelling approaches and numerical transport models. This study has taken components from these approaches to predict the evolution of mine water quality from backfilled opencast mines, during the initial flush, but with an additional component, defining it as a new approach. This component is calibration of geochemical modelling data and numerical flow and transport modelling data, with existing groundwater monitoring data over a short term, relative to the duration of the initial flush. Laboratory analyses were further used to augment the calibration process in various steps. Results obtained show that the initial flush in backfilled opencast mines is likely to last 20 to 100 years, depending on site specific conditions. To further understand this duration, speciation modelling and statistical analysis was undertaken to determine controlling mineral phases in solution at backfilled opencast coal mines. Pyrite, gypsum, calcite, kaolinite and possible smectite were identified as the major controlling mineral phases in mine water chemistry of backfilled opencast coal mines at the study sites used for this thesis. Based on the understanding of the controlling mineral phases in solution and the calibrated mine water quality predictions made, the study also proposed the maximisation of water addition to backfilled opencast coal mines as a means to accelerate the initial flush, potentially turning contaminated mine water into a resource. bs2026 Geology PhD Unrestricted SDG-06: Clean water and sanitation SDG-09: Industry, innovation and infrastructure SDG-12: Responsible consumption and production 2017-11-20T10:11:08Z 2017-11-20T10:11:08Z 2017 2017 Thesis Huisamen, A 2017, Quantification methods and management of hydrogeochemistry in decommissioned collieries of the Mpumalanga Coalfields, PhD Thesis, University of Pretoria, Pretoria, viewed yymmdd <http://hdl.handle.net/2263/63215> S2017 http://hdl.handle.net/2263/63215 en © 2017 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 Hydrogeochemistry Acid mine drainage Mpumalanga Coalfields Mine rehabilitation Geochemical modelling Natural and agricultural sciences theses SDG-06 Natural and agricultural sciences theses SDG-09 Natural and agricultural sciences theses SDG-12 Quantification methods and management of hydrogeochemistry in decommissioned collieries of the Mpumalanga Coalfields |
| title | Quantification methods and management of hydrogeochemistry in decommissioned collieries of the Mpumalanga Coalfields |
| title_full | Quantification methods and management of hydrogeochemistry in decommissioned collieries of the Mpumalanga Coalfields |
| title_fullStr | Quantification methods and management of hydrogeochemistry in decommissioned collieries of the Mpumalanga Coalfields |
| title_full_unstemmed | Quantification methods and management of hydrogeochemistry in decommissioned collieries of the Mpumalanga Coalfields |
| title_short | Quantification methods and management of hydrogeochemistry in decommissioned collieries of the Mpumalanga Coalfields |
| title_sort | quantification methods and management of hydrogeochemistry in decommissioned collieries of the mpumalanga coalfields |
| topic | UCTD Hydrogeochemistry Acid mine drainage Mpumalanga Coalfields Mine rehabilitation Geochemical modelling Natural and agricultural sciences theses SDG-06 Natural and agricultural sciences theses SDG-09 Natural and agricultural sciences theses SDG-12 |
| url | http://hdl.handle.net/2263/63215 |