Extraction costs of mines
- Created by: Luke Mitchell
- Created on: 17-01-13 13:11
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- Extraction Costs
- Overburden
- 1). rock above mineral that must be removed
- 2). if overburden is very hard it is expensive to remove as it may need to be blasted
- Depth
- 1). mining costs rise rapidly as depth increases
- 2). if depth doubles, price is doubled
- 3). sides of mine cannot be vertical or mine ill collapse = more extraction cost as depth increases
- 4). if overburden is loose then gradient must be more gentle increasing extraction costs further
- Form of deposit
- 1). mining costs will increase if mineral is found in thin layers or dispersed in irregular shaped deposit
- 2). both of these problems would increase size of mine void needed to be excavated
- Hydrology
- 1). as depth increase amount of water that flows into mine also rises
- 2). pumping costs can be high
- Overburden
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