A new model for open-pit production and waste-dump scheduling
An open-pit mine schedule defines the optimal sequence of mining valuable (ore) and waste material with the objective of maximizing the value of the project. Given this production schedule, a waste-dump schedule is then developed to determine the optimal waste-rock allocation in waste dumps. Thus, p...
| Main Authors: | , , |
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| Format: | Journal Article |
| Published: |
Taylor and Francis
2019
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| Online Access: | http://hdl.handle.net/20.500.11937/74506 |
| _version_ | 1848763294164189184 |
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| author | Fu, Z. Asad, Mohammad Waqar Topal, Erkan |
| author_facet | Fu, Z. Asad, Mohammad Waqar Topal, Erkan |
| author_sort | Fu, Z. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | An open-pit mine schedule defines the optimal sequence of mining valuable (ore) and waste material with the objective of maximizing the value of the project. Given this production schedule, a waste-dump schedule is then developed to determine the optimal waste-rock allocation in waste dumps. Thus, production and waste-dump schedules are managed separately, which leads to an inappropriate consideration of the material haulage cost, suboptimal schedules generating less value, and the incorrect classification of ore and waste. This article proposes a mixed-integer programming-based model that determines the optimal production and waste-rock dumping schedule concurrently with the objective of maximizing the discounted cash flow [net present value (NPV)] of the project. An implementation of the proposed model on a gold-mining operation outperforms the two existing methods [traditional and two-step mixed-integer programming (TSMIP) model] in the context of project NPV as well as its practicality. |
| first_indexed | 2025-11-14T11:01:10Z |
| format | Journal Article |
| id | curtin-20.500.11937-74506 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:01:10Z |
| publishDate | 2019 |
| publisher | Taylor and Francis |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-745062019-08-08T05:27:51Z A new model for open-pit production and waste-dump scheduling Fu, Z. Asad, Mohammad Waqar Topal, Erkan An open-pit mine schedule defines the optimal sequence of mining valuable (ore) and waste material with the objective of maximizing the value of the project. Given this production schedule, a waste-dump schedule is then developed to determine the optimal waste-rock allocation in waste dumps. Thus, production and waste-dump schedules are managed separately, which leads to an inappropriate consideration of the material haulage cost, suboptimal schedules generating less value, and the incorrect classification of ore and waste. This article proposes a mixed-integer programming-based model that determines the optimal production and waste-rock dumping schedule concurrently with the objective of maximizing the discounted cash flow [net present value (NPV)] of the project. An implementation of the proposed model on a gold-mining operation outperforms the two existing methods [traditional and two-step mixed-integer programming (TSMIP) model] in the context of project NPV as well as its practicality. 2019 Journal Article http://hdl.handle.net/20.500.11937/74506 10.1080/0305215X.2018.1476501 Taylor and Francis restricted |
| spellingShingle | Fu, Z. Asad, Mohammad Waqar Topal, Erkan A new model for open-pit production and waste-dump scheduling |
| title | A new model for open-pit production and waste-dump scheduling |
| title_full | A new model for open-pit production and waste-dump scheduling |
| title_fullStr | A new model for open-pit production and waste-dump scheduling |
| title_full_unstemmed | A new model for open-pit production and waste-dump scheduling |
| title_short | A new model for open-pit production and waste-dump scheduling |
| title_sort | new model for open-pit production and waste-dump scheduling |
| url | http://hdl.handle.net/20.500.11937/74506 |