Surface mining: strip mining Flashcards
1
Q
strip mining/open cast mining
A
involves starting at one end of a deposit and working along it horizontally
2
Q
overburden:
A
waste above ore is removed and dumped behind the previously mined are
3
Q
adv
A
- once started, can all start at once
- most costs are upfront
- environmental damage can be minimised
4
Q
dis adv:
A
- lack of rehab will result in damage to the environment
- ore production can be limited by waste stripping
5
Q
scraper:
A
- front wheel drive
- sometimes in tandem with another scraper or bulldozer pushing
6
Q
bucket wheel excavator
A
large bucket rotating collecting ore and discharging it onto a conveyor that is setup behind the machine
7
Q
bucket chain excavator
A
- long arm with many buckets attached to it
- moves horizontally and arm can move vertically
8
Q
dredging
A
digging up earth underwater which is then deposited onto a conveyor
9
Q
hydraulic minng
A
high pressure water directed at face of either soft or gravel type material
