1) A hydraulic shovel with a bottom-dump bucket with a heaped bucket volume of 10 m3...

1) A hydraulic shovel with a bottom-dump bucket with a heaped bucket volume of 10 m³ is excavating tough clay. The swing angle is 103 degrees and the job efficiency is 0.85 + (8/100). Calculate the shovel production in BCM.

2) Estimate the time required to load 408 m³ of gravel from a stockpile into trucks using a clamshell having a heaped bucket capacity of 0.57 m³. Estimated cycle time is 20s. Swing depth factor = 1.0. Job efficiency is estimated to be 58 min/h.

3) A small hydraulic excavator will be used to dig a trench in hard clay. The trench size is 0.76 m wide by 1.50 + (58/100) m deep. The excavator bucket available is 0.76 m wide and has a heaped capacity of 0.50 + (8/100) m³. The maximum digging depth of the excavator is 4.90 m. The average swing angle is expected to be 75° and the job efficiency is 78 %. Estimate the hourly trench production in BCM and in linear meters of trench.

Expert Solution

Ally Wells answered 8 months ago

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