Underground Mining (Leaving Cert Engineering): Flashcards
📚Flashcards
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13 cards from this deck
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Practise the cards
13 cards from this deck
Underground mining definition
Underground mining definition
Extracting ores/minerals deep beneath Earth's surface
When underground mining is used
When underground mining is used
When valuable ores are too deep for surface mining
Mine shaft
Mine shaft
Vertical tunnel providing access to underground ore deposits
Tunnels and drifts
Tunnels and drifts
Horizontal passages from shaft to reach and extract ore
Environmental benefit of underground mining
Environmental benefit of underground mining
Less visual impact on landscape than open-pit mining
Continuous mining machines
Continuous mining machines
Machines with rotating cutting heads for underground extraction
Cutting feature of continuous miners
Cutting feature of continuous miners
Rotating cutting heads with multiple cutting teeth
Vertical shaft mines
Vertical shaft mines
Use straight-down shafts with horizontal levels
Slope mines
Slope mines
Inclined access tunnels following ore deposit
Drift mines
Drift mines
Horizontal tunnels driven directly into hillsides
Headframes
Headframes
Surface structures supporting lifting equipment
Tunnel collapse risk
Tunnel collapse risk
Rock falls and structural failures in underground mines
Gas pocket risk
Gas pocket risk
Dangerous gases accumulating in enclosed spaces underground