FRONT END LOADERS AS LOADING AND CONVEYING APPLIANCES IN QUARRIES

IN CONJUNCTION WITH THE DEVELOPMENT OF QUARRY EQUIPMENT, THE SIZES OF FRONT END LOADERS HAVE ALSO INCREASED. THE MACHINES ARE BEING USED MORE AND MORE FOR LOADING AND CONVEYING OPERATIONS IN QUARRIES. A TABLE GIVES THE PRINCIPAL DATA ON THE FRONT END LOADERS CURRENTLY ON THE MARKET, AND THEIR VARIOUS DISTINCTIVE DESIGN FEATURES ARE DISCUSSED. FOR LOADING WORK IN QUARRIES CERTAIN MINIMUM REQUIREMENTS MUST BE APPLIED AS TO DUMPING HIGH, DUMPING REACH, DRIVE POWER, BITING FORCE, AND MANEUVERABILITY SIMPLIFIED CONTROL OF THE OPERATIONS, SO THAT NOT MANY MORE THAN A DOZEN MACHINES APPEAR TO BE SUITABLE FOR THE PURPOSE. THE ATTAINABLE LOADING PERFORMANCES IN COMPARISON WITH SHOVELS ARE CONSIDERED WITH REFERENCE TO AN ACTUAL EXAMPLE OF PLANT OPERATION. IN GENERAL, FOR EQUAL SIZE OF SHOVEL AND BUCKET, THE PERFORMANCE FIGURES FOR FRONT END LOADERS ALWAYS FALL SHORT OF THOSE FOR SHOVELS. THE COST COMPARISON EXPLAINS THE SOMEWHAT HIGHER COAST OF LOADING WITH THE FRONT END LOADER, BUT ALSO SHOWS ITS SUPERIORITY IN TERMS OF COST WHEN PERFORMING SELECTIVE LOADING WORK. ITS VERSATILITY IN USE ENABLES HIGH UTILIZATION FACTORS TO BE ATTAINED. WITH SELECTIVE LOADING WORK, HOWEVER, FAVOURABLE OPERATION OF FRONT END LOADERS FROM THE COST VIEWPOINT IS NOT POSSIBLE IN EVERY ROCK PILE. FOR THIS REASON IT IS NECESSARY TO PLAN HARMONIOUS CO-OPERATION WITH SHOVELS THE USE OF FRONT END LOADERS FOR LOADING AND CONVEYING WORK IS THEN COMPARED WITH THE USE OF SHOVELS AND HEAVY LORRIES (TRUCKS) AS MEANS OF TRANSPORT. FOR HAULAGE DISTANCES UP TO 75 M IT IS MORE FAVOURABLE TO USE VERY LARGE FRONT END LOADERS FROM THE POINT OF VIEW OF COST. ECONOMIC USE OF THESE MACHINES FOR SHORT HAULS IS, FOR THE PRESENT, POSSIBLE ONLY IN COMBINATION WITH MOBILE OR TRANSPORTABLE CRUSHING PLANTS WHICH ARE ABLE TO MOVE ALONG WITH THE QUARRYING OPERATIONS AS THEY ADVANCE. /AUTHOR/

• Supplemental Notes:
  • Vol 57, No 7, PP 277-286
• Authors:
  • Pietsch, H J
• Publication Date: 1968-7

Media Info

• Serial:
  • Zement-Kalk-Gips

Subject/Index Terms

• TRT Terms: Alternatives analysis; Conveyors; Costs; Crushers; Design; Loads; Quarries; Roadbuilding machinery; Size; Trucks; Waste disposal
• Uncontrolled Terms: Design features; Loading
• Old TRIS Terms: Conveying; Front end loaders; Power shovels
• Subject Areas: Design; Finance; Geotechnology; Highways; Motor Carriers; Vehicles and Equipment;

Filing Info

• Accession Number: 00217774
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 23 1994 12:00AM