Lhd

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  • En bas à gauche ROCK WORLD, 1/2001 Sansvik Tamrock customer magazine, p.27. Alp Transit tunnel construction in Bodio, Switzerland. Loader Sansvik Tamrock : Broyt ED 600T Compact 3,4 m3 bucket Electric-Diesel (ED) Powerpack The Truck : Type A : 32 - ton rigid body (Ferrari DM 3227), 16 m3(struck)/22 m3 (heaped) Type B : 25 - ton artuculated (Bell 25), 13 m3(struck)/18 m3 (heaped) A truck five full buckets - 112 seconds, B truck - 80 seconds, Tunnel 50 m² : 6.75 at floor level and 7.8 width at a level of 2.5 m from the floor.
  • Lhd

    1. 1. LHD - load haulage damp Bucket size : from 0,5 to 8,4 m 3 Optimal tramming distance : 150 - 400 m Yield : 300 - 800 t/shift
    2. 2. Mucking by LHD
    3. 3. Loading by Slusher Bucket size : from 0,22 to 0,8 m 3 Optimal tramming distance : 20 - 50 m Yield : 30 - 100 t/shift
    4. 4. Mucking by Slusher Bucket size : from 0,22 to 0,8 m 3 Optimal tramming distance : 20 - 50 m Yield : 30 - 100 t/shift
    5. 5. Mucking and loading by overhead loader Bucket size : from 0,125 to 1 m 3 Container size : 1 to 5 m 3 Optimal tramming distance : 5 - 20 m Technical Yield : 20 - 60 t/hour
    6. 6. Mucking and loading by vibrating feeder Technical Yield : 20 - 60 t/hour Minimal ore reserve : 100 000 t
    7. 7. Haulage by track Capacity : from 6 to 60 t ; Tramming distance : 500 à 1000 m
    8. 8. Track loading Loading by vibrating feeder Loading by LHD Loading by hydraulic shovel
    9. 9. Haulage by train
    10. 10. Haulage by train Locomotive 18 tonnes, wagons of 7.5 m 3 , Kiruna : 500 t by train
    11. 11. Wagon loading Loading by vibrating feeder Loading by LHD Loading by overhead loader
    12. 12. Conveyer belt transport
    13. 13. Scaling Machine
    14. 14. Bolting
    15. 15. Bolt installation mechanized manual
    16. 16. Cost of loading where : C load - operating cost of loading in $ per tonne of rock ; C hour - hourly operating cost of the equipment in $ per hour ; P average - average production rate of the equipment in tonnes per hour.
    17. 17. Production rate of loading where : Q - bucket size, m 3 ;  - ore density, t/ m 3 ; f fill - bucket filling factor ; f swelling =1.1 to 1.5 - swelling factor ; D - one way tramming distance in meters ; v - average speed over the cycle in kilometers per hour ; t fix - fixed cycle time (load, damp, maneuver) in minutes ; j = 50 min - operating minutes per hour to account for delays in minutes;
    18. 18. Production rate of loading LHD : 0,5 to 8,4 m 3 Q - bucket size Slusher : 0,22 to 0,8 m 3 Overhead loader (CAVO) : bucket 0,125 to 1 m 3 container 1 to 5 m 3
    19. 19. f fill - bucket filling factor Coarse blocs : f fill = 0,8 - 1,1 Moist material : f fill = 0,55 - 0,7 Fine material < 50 mm : f fill = 0,55 - 0,75 LHD Slusher Gros blocs de minerai : f fill = 0,5 - 0,7 Minerai fine < 50 mm : f fill = 0,8 - 1   Production rate of loading
    20. 20. v - average speed over the cycle Favorable conditions : v = 9 à 16 km/h Average conditions : v = 8 à 12 km/h Unfavorable conditions : v = 5 à 8 km/h Diesel-driven LHD Slusher v = 4.5 to 5.5 km/h  Favorable conditions : v = 9.5 km/h Average conditions : v = 6.5 km/h Unfavorable conditions : v = 3.2 km/h Electric-driven LHD  Production rate of loading
    21. 21. t fix - fixed cycle time (loading, dumping, maneuver) Favorable conditions : t fix = 0.8 min Average conditions : t fix = 1.1 min Unfavorable conditions : t fix = 1.4 min LHD Slusher t fix = 0.5 min  Production rate of loading
    22. 22. Distance variable D max D min Distance Production D min D max R = f(D)
    23. 23. Average production rate of loading where : Q - bucket size, m 3 ;  - ore density, t/ m 3 ; f fill - bucket filling factor ; f swelling = 1.1 to 1.5 - rock swelling factor ; D min - minimum one way tramming distance in meters ; D max - maximum one way tramming distance in meters ; v - average speed over the cycle in kilometers per hour ; t fix - fixed cycle time (load, damp, maneuver) in minutes ; j = 50 min - operating minutes per hour to account for delays in minutes;
    24. 24. Influence of distance on production
    25. 25. Variable distance
    26. 26. Cost estimation Capital cost Hourly operating cost Operator labor Parts Maintenance labor Diesel fuel Electric power Lube oil Tires Compressed air
    27. 27. Hourly operating cost
    28. 28. Capital cost

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