dc.contributor.author |
Manu, Eric Kwakye |
|
dc.date.accessioned |
2022-08-18T12:06:05Z |
|
dc.date.available |
2022-08-18T12:06:05Z |
|
dc.date.issued |
2021-01 |
|
dc.identifier.citation |
Manu, E. K. (2019) Open Pit Optimisation, Design and Production Scheduling – A Case Study. MSc. Thesis. University of Mines and Technology. |
en_US |
dc.identifier.uri |
http://localhost:8080/xmlui/handle/123456789/378 |
|
dc.description |
ix, 71p. ill. |
en_US |
dc.description.abstract |
Iron ore mining operations started declining in 2012 due to falling concentrate prices. Some
mining operations in Sierra Leone had to shut down totally or go under care and
maintenance owing to the falling concentrate prices. Most operating mines and those
intending to resume operations have had to implement strategic plans with the objective of
maximising profits to keep the project running. Sierra Leone (SL) Mining Plc acquired the
rights to the Marampa deposit and plans to resume operations with the intention to maximise
profits at the prevailing world market conditions. With iron ore price on the world market
relatively low, there was the need to determine the feasibility and profitability of the project.
In this work, GEOVIA Surpac was used to validate and generate the block model of the
Marampa deposit. Whittle software was used for optimisation and the optimal pit selected
using the highest Net Present Value (NPV) criteria. GEOVIA Mineshed was used to
generate a long-term mining schedule to meet the annual processing plant throughput and
was again used to design the optimised pit. The optimal pit produced 174 836 920 t of ore
at an average grade of 33.89 %Fe. An NPV of US$ 184 665 345 for 29 years of mining was
obtained at a stripping ratio of 0.34:1. The project is sensitive to iron ore price, mining
recovery and dilution. The designed pit contains 171 393 104 t of ore at an average grade of
34.42 %Fe at an NPV of US$ 155 437 194 to be mined for 27.6 years. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
University of Mines and Technology |
en_US |
dc.subject |
Mining |
en_US |
dc.subject |
Mine planning |
en_US |
dc.subject |
Mine design |
|
dc.title |
Open pit optimisation, design and production scheduling – a case study |
en_US |
dc.type |
Thesis |
en_US |