Geothermal study to explain man-made permafrost in tailings with raised surface
Deposition of mine tailings in a cold climate requires precautions as temporary sub-zero temperatures can imply considerable consequences to the storage due to creation of permafrost. The risk of creating man-made permafrost lenses due to tailings deposition exists even in regions with no natural pe...
Published in: | Environmental Earth Sciences |
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Luleå tekniska universitet, Geoteknologi
2018
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-68239 https://doi.org/10.1007/s12665-018-7465-8 |
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ftluleatu:oai:DiVA.org:ltu-68239 2023-05-15T17:55:44+02:00 Geothermal study to explain man-made permafrost in tailings with raised surface Knutsson, Roger Viklander, Peter Knutsson, Sven Laue, Jan 2018 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-68239 https://doi.org/10.1007/s12665-018-7465-8 eng eng Luleå tekniska universitet, Geoteknologi Environmental Earth Sciences, 1866-6280, 2018, 77:7, http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-68239 doi:10.1007/s12665-018-7465-8 ISI:000429985900026 Scopus 2-s2.0-85044986446 info:eu-repo/semantics/openAccess Geotechnical Engineering Geoteknik Article in journal info:eu-repo/semantics/article text 2018 ftluleatu https://doi.org/10.1007/s12665-018-7465-8 2022-10-25T20:54:26Z Deposition of mine tailings in a cold climate requires precautions as temporary sub-zero temperatures can imply considerable consequences to the storage due to creation of permafrost. The risk of creating man-made permafrost lenses due to tailings deposition exists even in regions with no natural permafrost, as material being frozen during winter might not fully thaw by the following summer. When such frozen layers thaw during later longer warmer periods, excess pore water pressure and large settlements might develop. Such implications close to the dam structure have to be avoided and therefore the risk of generating permafrost should be reduced. This paper describes a geothermal model for one-dimensional heat conduction analysis. The model is able to simulate the temperature profile in tailings where the surface elevation is constantly increased due to deposition. At the tailings surface, the boundary condition is the air temperature changing over time during the year. Air temperatures, tailings deposition schedule and tailings properties are given as input to the model and can easily be changed and applied to specific facilities. The model can be used for tailings facilities in cold regions, where the effects of tailings deposition on the temperature regime are of interest. Findings can improve tailings management by explaining man-made permafrost generation. The model can also aid in setting up appropriate deposition schedules and to prevent generation of permafrost layers. Validerad;2018;Nivå 2;2018-04-09 (andbra) Article in Journal/Newspaper permafrost Luleå University of Technology Publications (DiVA) Environmental Earth Sciences 77 7 |
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Open Polar |
collection |
Luleå University of Technology Publications (DiVA) |
op_collection_id |
ftluleatu |
language |
English |
topic |
Geotechnical Engineering Geoteknik |
spellingShingle |
Geotechnical Engineering Geoteknik Knutsson, Roger Viklander, Peter Knutsson, Sven Laue, Jan Geothermal study to explain man-made permafrost in tailings with raised surface |
topic_facet |
Geotechnical Engineering Geoteknik |
description |
Deposition of mine tailings in a cold climate requires precautions as temporary sub-zero temperatures can imply considerable consequences to the storage due to creation of permafrost. The risk of creating man-made permafrost lenses due to tailings deposition exists even in regions with no natural permafrost, as material being frozen during winter might not fully thaw by the following summer. When such frozen layers thaw during later longer warmer periods, excess pore water pressure and large settlements might develop. Such implications close to the dam structure have to be avoided and therefore the risk of generating permafrost should be reduced. This paper describes a geothermal model for one-dimensional heat conduction analysis. The model is able to simulate the temperature profile in tailings where the surface elevation is constantly increased due to deposition. At the tailings surface, the boundary condition is the air temperature changing over time during the year. Air temperatures, tailings deposition schedule and tailings properties are given as input to the model and can easily be changed and applied to specific facilities. The model can be used for tailings facilities in cold regions, where the effects of tailings deposition on the temperature regime are of interest. Findings can improve tailings management by explaining man-made permafrost generation. The model can also aid in setting up appropriate deposition schedules and to prevent generation of permafrost layers. Validerad;2018;Nivå 2;2018-04-09 (andbra) |
format |
Article in Journal/Newspaper |
author |
Knutsson, Roger Viklander, Peter Knutsson, Sven Laue, Jan |
author_facet |
Knutsson, Roger Viklander, Peter Knutsson, Sven Laue, Jan |
author_sort |
Knutsson, Roger |
title |
Geothermal study to explain man-made permafrost in tailings with raised surface |
title_short |
Geothermal study to explain man-made permafrost in tailings with raised surface |
title_full |
Geothermal study to explain man-made permafrost in tailings with raised surface |
title_fullStr |
Geothermal study to explain man-made permafrost in tailings with raised surface |
title_full_unstemmed |
Geothermal study to explain man-made permafrost in tailings with raised surface |
title_sort |
geothermal study to explain man-made permafrost in tailings with raised surface |
publisher |
Luleå tekniska universitet, Geoteknologi |
publishDate |
2018 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-68239 https://doi.org/10.1007/s12665-018-7465-8 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
Environmental Earth Sciences, 1866-6280, 2018, 77:7, http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-68239 doi:10.1007/s12665-018-7465-8 ISI:000429985900026 Scopus 2-s2.0-85044986446 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s12665-018-7465-8 |
container_title |
Environmental Earth Sciences |
container_volume |
77 |
container_issue |
7 |
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1766163714956853248 |