MC 279 HANDOUT
Page 13
Shovel Production Estimation
Formula for estimating production rate of a shovel Q (m3/hr) provided.
Example calculation given for determining hourly production of a 4m3 power shovel.
Cycle time, swell factor, dipper fill factor, availability, and utilization considered in the calculation.
Hourly production of shovel calculated in bank m3 and loose m3.
Page 14
Hydraulic Excavators
Introduction of hydraulic excavators in the 1970s in the Surface Mining Industry.
Two basic machine configurations: hydraulic shovel and hydraulic backhoe.
General characteristics of hydraulic excavators listed.
Bucket capacities, machine weight, power ranges, mobility, gradeability, swing speeds, breakout force, and service life mentioned.
Comparison of characteristics between shovel and backhoe provided in a table.
Page 15
Basic Machine Operation
Description of the primary use of hydraulic excavators for excavating and loading.
Operation cycle outlined: cutting, swing loaded, dump, swing empty back to face.
Propelling, crowding, hoisting motion, and bucket rotation explained.
Bucket design differences between hydraulic shovel and backhoe discussed.
Page 16
Applications of Hydraulic Excavator
Main uses of shovel/backhoe: loading trucks and hoppers/crushers, overburden removal, coal/ore loading, cutting trenches.
Distinction in digging capabilities between shovel and backhoe highlighted.
Various applications of backhoe in different scenarios described.
Page 17
Comparison of Digging Motions
Comparison of digging motions of front-end loader, power shovel, and hydraulic shovel presented in a figure.
Page 18
Comparison of Digging Motions
Continued comparison of digging
MC 279 HANDOUT
Page 13
Shovel Production Estimation
Formula for estimating production rate of a shovel Q (m3/hr) provided.
Example calculation given for determining hourly production of a 4m3 power shovel.
Cycle time, swell factor, dipper fill factor, availability, and utilization considered in the calculation.
Hourly production of shovel calculated in bank m3 and loose m3.
Page 14
Hydraulic Excavators
Introduction of hydraulic excavators in the 1970s in the Surface Mining Industry.
Two basic machine configurations: hydraulic shovel and hydraulic backhoe.
General characteristics of hydraulic excavators listed.
Bucket capacities, machine weight, power ranges, mobility, gradeability, swing speeds, breakout force, and service life mentioned.
Comparison of characteristics between shovel and backhoe provided in a table.
Page 15
Basic Machine Operation
Description of the primary use of hydraulic excavators for excavating and loading.
Operation cycle outlined: cutting, swing loaded, dump, swing empty back to face.
Propelling, crowding, hoisting motion, and bucket rotation explained.
Bucket design differences between hydraulic shovel and backhoe discussed.
Page 16
Applications of Hydraulic Excavator
Main uses of shovel/backhoe: loading trucks and hoppers/crushers, overburden removal, coal/ore loading, cutting trenches.
Distinction in digging capabilities between shovel and backhoe highlighted.
Various applications of backhoe in different scenarios described.
Page 17
Comparison of Digging Motions
Comparison of digging motions of front-end loader, power shovel, and hydraulic shovel presented in a figure.
Page 18
Comparison of Digging Motions
Continued comparison of digging