Metal Ore Extraction (Leaving Cert Engineering): Flashcards
📚Flashcards
Practise the cards
12 cards from this deck
ShowHide
Practise the cards
12 cards from this deck
Open pit mining
Open pit mining
Surface extraction method for metal ores
When is open pit mining used?
When is open pit mining used?
Ore near surface but extends deep underground
How deep can open pit mines reach?
How deep can open pit mines reach?
Hundreds of metres
Tools used in open pit mining
Tools used in open pit mining
Heavy plant machinery and explosives
What are benches in open pit mining?
What are benches in open pit mining?
Stepped terraced levels
Purpose of terraced design
Purpose of terraced design
Stable platforms, safe access, prevent rock falls, systematic extraction
Dump trucks function
Dump trucks function
Transport extracted materials along access roads
Excavators function
Excavators function
Remove overburden and extract ore
Drilling equipment function
Drilling equipment function
Creates holes for explosive placement
Bulldozers function
Bulldozers function
Level surfaces and maintain roads
Environmental impacts of open pit mining
Environmental impacts of open pit mining
Landscape change, habitat loss, displacement, pollution
Reclamation
Reclamation
Restoring mined areas after extraction