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Question 1

Estimate the actual bucket load in bank cubic meter for a loader bucket whose heaped capacity is 3.82 m³. The soil bucket fill factor is 0.90, and its load factor is 0.80

Answer 1

2.75 BCM

Question 2

Find the expected production in LCM/hr of a small hydraulic excavator. Heaped bucket capacity is 0.57 m³. The material is sand and gravel with a bucket fill factor of 0.95. Job Efficiency is 50min/hr. Average depth of cut is 4.3 m. Maximum depth of cut is 6.1m and average swing is 90.

Answer 2

113 LCM/h

Question 3

Find the expected production in LCM/h of a 2.3 m³ hydraulic shovel equipped with a front-dump bucket. The material is common earth with a bucket fill factor of 1.0. The average angle of swing is 75deg and job efficiency is 0.80

Answer 3

290 LCM/h

Question 4

Determine the expected dragline production in LCM/h based on the following information.

Dragline size = 1.3 m³
Swing angle = 120deg
Average depth of cut = 2.4m
Material = common earth
Job efficiency = 50min/h
Soil swell = 25%

Answer 4

165 LCM/h

Question 5

A power-shift crawler tractor has a rated blade capacity of 7.65 LCM. The dozer is excavating loose common earth and pushing it a distance of 61m. Maximum reverse speed in third range is 8 km/h. Estimate the production of the dozer if job efficiency is 50min/hr.

Answer 5

Cycle time = 1.41 min
Production = 271 LCM/h

Question 6

Estimate the hourly production in LCM of a 2.68 m³ wheel loader excavating sand and gravel (average material) from a pit and moving it to a stockpile. The average haul distance is 61m. The effective grade is 6%, the bucket fill factor is 1.00 and job efficiency is 50min/h.

Answer 6

Cycle time = 0.80 min
Production = 168 LCM/h