Optimal grade control sampling practice in open-pit mining:a full-scale blast hole versus reverse circulation variographic experiment
Misclassification of ore grades results in lost revenues, and the need for representative sampling procedures in open pit mining is increasingly important in all mining industries. This study evaluated possible improvements in sampling representativity with the use of Reverse Circulation (RC) drill...
Published in: | Applied Earth Science |
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Online Access: | https://vbn.aau.dk/da/publications/d3383231-4050-4829-99f5-fd325475e1af https://doi.org/10.1080/03717453.2017.1414104 |
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ftalborgunivpubl:oai:pure.atira.dk:publications/d3383231-4050-4829-99f5-fd325475e1af 2024-09-15T18:26:06+00:00 Optimal grade control sampling practice in open-pit mining:a full-scale blast hole versus reverse circulation variographic experiment Engström, Karin Esbensen, Kim Harry 2017-12-27 https://vbn.aau.dk/da/publications/d3383231-4050-4829-99f5-fd325475e1af https://doi.org/10.1080/03717453.2017.1414104 eng eng https://vbn.aau.dk/da/publications/d3383231-4050-4829-99f5-fd325475e1af info:eu-repo/semantics/closedAccess Engström , K & Esbensen , K H 2017 , ' Optimal grade control sampling practice in open-pit mining : a full-scale blast hole versus reverse circulation variographic experiment ' , Applied Earth Science: Transactions of the Institutions of Mining and Metallurgy , vol. 126 , no. 4 , pp. 176-187 . https://doi.org/10.1080/03717453.2017.1414104 article 2017 ftalborgunivpubl https://doi.org/10.1080/03717453.2017.1414104 2024-08-29T00:19:40Z Misclassification of ore grades results in lost revenues, and the need for representative sampling procedures in open pit mining is increasingly important in all mining industries. This study evaluated possible improvements in sampling representativity with the use of Reverse Circulation (RC) drill sampling compared to manual Blast Hole (BH) sampling in the Leveäniemi open pit mine, northern Sweden. The variographic experiment results showed that sampling variability was lower for RC than for BH sampling. However, the total costs for RC drill sampling are significantly exceeding current costs for manual BH sampling, which needs to be compensated for by other benefits to motivate introduction of RC drilling. The main conclusion is that manual BH sampling can be fit-for-purpose in the studied open pit mine. However, with so many mineral commodities and mining methods in use globally, there is no universal best practice for open pit drill sampling and each case must be evaluated individually. Article in Journal/Newspaper Northern Sweden Aalborg University's Research Portal Applied Earth Science 126 4 176 187 |
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Open Polar |
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Aalborg University's Research Portal |
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ftalborgunivpubl |
language |
English |
description |
Misclassification of ore grades results in lost revenues, and the need for representative sampling procedures in open pit mining is increasingly important in all mining industries. This study evaluated possible improvements in sampling representativity with the use of Reverse Circulation (RC) drill sampling compared to manual Blast Hole (BH) sampling in the Leveäniemi open pit mine, northern Sweden. The variographic experiment results showed that sampling variability was lower for RC than for BH sampling. However, the total costs for RC drill sampling are significantly exceeding current costs for manual BH sampling, which needs to be compensated for by other benefits to motivate introduction of RC drilling. The main conclusion is that manual BH sampling can be fit-for-purpose in the studied open pit mine. However, with so many mineral commodities and mining methods in use globally, there is no universal best practice for open pit drill sampling and each case must be evaluated individually. |
format |
Article in Journal/Newspaper |
author |
Engström, Karin Esbensen, Kim Harry |
spellingShingle |
Engström, Karin Esbensen, Kim Harry Optimal grade control sampling practice in open-pit mining:a full-scale blast hole versus reverse circulation variographic experiment |
author_facet |
Engström, Karin Esbensen, Kim Harry |
author_sort |
Engström, Karin |
title |
Optimal grade control sampling practice in open-pit mining:a full-scale blast hole versus reverse circulation variographic experiment |
title_short |
Optimal grade control sampling practice in open-pit mining:a full-scale blast hole versus reverse circulation variographic experiment |
title_full |
Optimal grade control sampling practice in open-pit mining:a full-scale blast hole versus reverse circulation variographic experiment |
title_fullStr |
Optimal grade control sampling practice in open-pit mining:a full-scale blast hole versus reverse circulation variographic experiment |
title_full_unstemmed |
Optimal grade control sampling practice in open-pit mining:a full-scale blast hole versus reverse circulation variographic experiment |
title_sort |
optimal grade control sampling practice in open-pit mining:a full-scale blast hole versus reverse circulation variographic experiment |
publishDate |
2017 |
url |
https://vbn.aau.dk/da/publications/d3383231-4050-4829-99f5-fd325475e1af https://doi.org/10.1080/03717453.2017.1414104 |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
Engström , K & Esbensen , K H 2017 , ' Optimal grade control sampling practice in open-pit mining : a full-scale blast hole versus reverse circulation variographic experiment ' , Applied Earth Science: Transactions of the Institutions of Mining and Metallurgy , vol. 126 , no. 4 , pp. 176-187 . https://doi.org/10.1080/03717453.2017.1414104 |
op_relation |
https://vbn.aau.dk/da/publications/d3383231-4050-4829-99f5-fd325475e1af |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1080/03717453.2017.1414104 |
container_title |
Applied Earth Science |
container_volume |
126 |
container_issue |
4 |
container_start_page |
176 |
op_container_end_page |
187 |
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1810466556965027840 |