THE ECONOMICAL USE OF QUARRY EQUIPMENT

THE ECONOMICAL USE OF QUARRY EQUIPMENT IS DISCUSSED AS CONCEIVED BY THE PRODUCTION AND INDUSTRIAL ENGINEER BY MAKING USE OF WORK STUDY, TIME STUDY, AND COST ANALYSIS. QUARRY EQUIPMENT IS TAKEN TO COMPRISE MECHANICAL SHOVELS, HEAVY DUTY LORRIES, AND BULLDOZERS. THE ATTAINMENT OF THE REQUIRED OUTPUT AT A FAVORABLE COST CALLS FOR THE FULFILLMENT OF VARIOUS PREREQUISITES: FAVORABLE OUTPUT CONDITIONS, SHORT PLANT BREAKDOWN AND WAITING TIMES, LONG SERVICE LIFE, AND COORDINATION OF THE VARIOUS ITEMS OF EQUIPMENT. THE GREAT INFLUENCE OF BREAKDOWN AND MAINTENANCE TIMES ON THE CONCERTED OPERATION OF FACE SHOVEL, LORRY AND TIPPING POINT IS ILLUSTRATED. THE HOURLY COST RATES OF QUARRY EQUIPMENT ARE DEPENDENT ON THE REPAIR AND OTHER FORMS OF COSTS, AND THE LENGTH OF THE OPERATIONAL TIME. THE EFFECT OF OUTPUT FLUCTUATIONS UPON THE LOADING AND HAULAGE COSTS (DM PER TON OF QUARRY-RUN) IS OF DECISIVE IMPORTANCE. THE INFLUENCE OF THE CONDITION OF THE ROCK PILE (LOOSENED MATERIAL) ON THE EFFECTIVE LOADING PERFORMANCE OF THE SHOVEL IS MANIFESTED BY THREE SHOVELS OF DIFFERENT SIZES. THE PARTICLE STRUCTURE OF THE LOOSENED ROCK AFFECTS THE ACTUAL LOADING CAPACITY OF THE SHOVEL. THE AMOUNT OF SECONDARY BLASTING AND THE FREQUENCY OF THE SHOVEL MOVEMENTS, BEING LOST-TIME ITEMS DETERMINED BY THE NATURE OF THE LOOSENED ROCK, AFFECT THE AFFECTIVE CONTINUOUS OUTPUT OF THE SHOVEL. FINALLY, ON AN OPERATIONAL MODEL OF VARIOUS HEAVY-DUTY LORRIES AND BY MEANS OF ECONOMIC DISTANCE LIMITS, PRINCIPLES FOR THE ECONOMIC USE OF THE VEHICLES AND THE EFFECTS OF EXCEEDING THESE DISTANCE LIMITS ARE DEMONSTRATED. /AUTHOR/

• Supplemental Notes:
  • Vol 19, No 3, PP 105-114
• Corporate Authors:

  Zement-kalk-gips

  ,    
• Authors:
  • Koster, B
• Publication Date: 1966-3

Subject/Index Terms

• TRT Terms: Benefit cost analysis; Bulldozers; Distance; Economics; Equipment; Freight handling; Industrial engineering; Loads; Mechanical failure; Motion; Motor vehicles; Operating costs; Output; Particles; Production; Quarries; Rocks; Service life; Shape; Time and motion studies; Ultimate load design; Waiting time
• Uncontrolled Terms: Hauling; Loading; Moving vehicles
• Old TRIS Terms: Breakdown; Limits; Particle shapes; Shovels
• Subject Areas: Design; Economics; Freight Transportation; Geotechnology; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 00219284
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 20 1994 12:00AM