Surface Miners

Question 1

machines

Answer 1

move slowly forward - walking pace

Question 2

broken rock

Answer 2

carried away by conveyor to truck or dumped directly into truck

Question 3

wirtgen cutting up

Answer 3

drum spins so teeth are cutting up
adv:
- higher force horizontally
- drum maintain exact cut depth

Question 4

vermeer: cutting down

Answer 4

drum spins so teeth are cutting down
adv:
- can cut harder rock, less pick wear, improves effect of cutting force
dis adv:
- high cost per tonne
- low mechanical availability due to breakdowns