Cable Bolting Economy

When cablebolts have been well designed and installed, they reduce mining costs appreciably by reducing expensive dilution, and ore losses costs. Mechanized cable bolting costs compared with manually operated cable bolting is only 50%, which cover the investment in the equipment from a few months to 3 years, depending of how many meters had to be cable bolted/year. Below 4 "on the job reports" are presented.

The datas comes from mines use the Swedengineers cable bolting system. On the job report no 1.

COST COMPARISON (Different reinforcement methods)
Bolts are mounted with a drilling/bolting unit. Cables are mounted/grouted with a cable insertion unit (Swedengineers Minetech AB) and the drilling with a production drilling unit.
 
SEK/m Rebar Friction
anchored bolt		 Tubular bolt Expansion shell
anchored bolt		 Cable Resin bolt Complete
resin bolt
Rebar with
washer/m		 17         20 20
Friction anchored bolt
w. washer/m		   48       1" 1"
Tubular bolt
with washer/m		     81        
Expansion shell anchored
bolt w. washer/m		       28      
Cable/m         7.02    
Labour costs drilling/m 10 10 10 10 10 10 10
Labour costs mounting/m 12 4 12 4 4 5 6
Grout/m 1.1   1.1   1.1    
Resin costs           20.8 52
Maintenance costs
drilling unit/m		 14 14 14 14 14 14 14
Maintenance costs
mounting unit/m		 5   5 5 3    
Drill steel costs 6.5 6.5 6.5 6.5 7.75 6.5 6.5
  Costs for mounted cable/m: 46.87 SEK/m (17.86 USD/ft)
Total for 2.3 m SEK 150.88 189.75 298.08 155.25 107.80 175.49 249.55
75 ft USD 18.86 23.72 37.26 19.41 13.48 21.94 13.19

Waste dilution and ore losses
Examples from mines shows that cable bolting play an important role in reducing waste dilution and ore losses. A reduction of 10% means a very short pay-off time for the equipment.


Swedengineers Minetech AB, www.swedengineers.com,  mail@swedengineers.com