5.1. Travel Time Calculation

Try these first

1. 1.

   What is the swell factor?

   Hint

   Think about how volume changes when soil is disturbed.

2. 2.

   How do you compute cycle time?

   Hint

   Remember to consider each operational step!

3. 3.

   What does the swell factor represent?

   • Volume reduction
   • Volume change
   • Density decrease

   Hint

   Think about changes in material when it is loaded.

4. 4.

   Is the rolling resistance constant across a haul route?

   • True
   • False

   Hint

   Consider its independent nature from gradients.

5. 5.

   Given a scraper with a volume of 25 m³, calculate the effective load volume when the swell factor is considered and the scraper is loaded to 90%.

   Hint

   Don't forget to adjust the swell factor to find the bank volume!

6. 6.

   Assuming a pusher cycle time of 1.2 min, calculate how many scrapers can be operated with a total cycle time of 10 minutes.

   Hint

   Use the total cycle time effectively to find your answer.