Economic follow-up of cable bolting unit at Kiruna Mine (LKAB) 1994-1998
Kiruna Mine is the largest underground iron ore mine in the world with a production rate of 20 million tons (44 million lbs). Mining method is sub-level caving. Most operations are extremley mechanized to achieve the highest productivity.
The cable bolter is build on a Scania City (ordinary city lorry). Cable bolting is performed with a special cable (26 mm, with an air bleeding hose in the middle), 65 mm (2.54 inch) dia drill holes, 7-11 m (23-36 ft) long.
From june 1994 to dec 1998, were 99.012 m (324.750 ft) cable bolted. The unit is still in operation.
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Production costs cablebolter: |
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Labour costs mounting: |
USD | 0.95/m | (0.29/ft) |
| Production costs: | USD | 0.14/m | (0.04/ft) |
| Maintenance costs: | USD | 0.42/m | (0.13/ft) |
| Financial costs: | USD | 2.53/m | (0.77/ft) |
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Total costs cablebolter: |
USD | 4.04/m | (1.23/ft) |
| Costs material (cable, groute): | USD | 2.66/m | (0.81/ft) |
| Costs drilling (incl. fin. costs): | USD | 4.90/m | (1.49/ft) |
| TOTAL COSTS: | USD | 11.60/m | (3.53/ft) |
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