(25 points) A CAT 385FCS shovel is loading well-blasted rock (Fill Factor=85%) on a highway project. The average face height is expected to be 22’. Most of the cut will require a 150 degree swing of the shovel to load the haul units. What is a conservative production estimate in bcy/hr if the swell is 60%? Assume a 50-min/hr efficiency. Cycle time under ideal conditions is 35s. The optimum digging height (or depth) is 50% of the maximum digging height (or depth). To use table: Percentage of optimum height = Average Face Height/ Optimum Digging Height HINTS: Obtain required dimensions of the shovel from CAT44, Chapter 7. No need to interpolate from given table. Use closest value.
(25 points) A CAT 385FCS shovel is loading well-blasted rock (Fill Factor=85%) on a highway project. The average face height is expected to be 22’. Most of the cut will require a 150 degree swing of the shovel to load the haul units. What is a conservative production estimate in bcy/hr if the swell is 60%? Assume a 50-min/hr efficiency. Cycle time under ideal conditions is 35s. The optimum digging height (or depth) is 50% of the maximum digging height (or depth). To use table: Percentage of optimum height = Average Face Height/ Optimum Digging Height HINTS: Obtain required dimensions of the shovel from CAT44, Chapter 7. No need to interpolate from given table. Use closest value.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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. (25 points) A CAT 385FCS shovel is loading well-blasted rock (Fill Factor=85%) on a highway project. The average face height is expected to be 22’. Most of the cut will require a 150 degree swing of the shovel to load the haul units. What is a conservative production estimate in bcy/hr if the swell is 60%? Assume a 50-min/hr efficiency. Cycle time under ideal conditions is 35s.
- The optimum digging height (or depth) is 50% of the maximum digging height (or depth).
- To use table: Percentage of optimum height = Average Face Height/ Optimum Digging Height
HINTS:
- Obtain required dimensions of the shovel from CAT44, Chapter 7.
- No need to interpolate from given table. Use closest value.
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