Surface Mining Mechanical Extraction Methods Quiz

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What is the primary purpose of auger mining?

Preventing surface subsidence and spontaneous combustion

Draining acid-laden water from the mining area

Recovering coal under the highwall after strip mining (correct)

Extracting coal from deep underground mines

What is the main drawback of auger mining?

Causing surface subsidence and spontaneous combustion

Recovering coal at a high cost

Creating drainage holes for acid-laden water

Leaving about 65% of the coal reserve in place (correct)

What is the depth to which auger holes may be drilled?

Less than 50 m

Depends on the coal seam thickness

More than 90 m (correct)

Exactly 100 m

What is the mechanism by which coal is extracted in auger mining?

Rotating action of the auger cutting head Signup and view all the answers

What is the primary difference between highwall mining and auger mining?

The equipment used Signup and view all the answers

What is the maximum distance the highwall miner can advance under the highwall?

360 meters Signup and view all the answers

What percentage of coal recovery is typical for highwall mining?

50% Signup and view all the answers

What is a key advantage of the highwall miner over auger mining?

Ease of adjustment to varying seam thickness Signup and view all the answers

What is the primary function of a continuous mining system surface miner?

Loosening of rock, crushing, and loading on transportation system Signup and view all the answers

When is In-Pit Crushing and Conveying (IPCC) used?

When haulage distances increase and skilled labor is scarce Signup and view all the answers

What do aqueous extraction methods in surface mining use?

Water or liquid solvent Signup and view all the answers

What is the common element between highwall mining and auger mining?

Recovering coal under the highwall Signup and view all the answers

What is the primary purpose of auger mining?

Recovering coal under the highwall after strip mining Signup and view all the answers

What is a key disadvantage of auger mining?

High risk of surface subsidence and spontaneous combustion Signup and view all the answers

What is the primary difference between open-pit mining and auger mining?

Open-pit mining involves extracting minerals from a large open excavation, while auger mining recovers coal under the highwall Signup and view all the answers

What is the depth to which auger holes may be drilled?

More than 90m Signup and view all the answers

What is the primary difference between highwall mining and auger mining?

The equipment used Signup and view all the answers

What is the primary function of a continuous mining system surface miner?

Crushing the rock to small particle size Signup and view all the answers

What is the maximum distance the highwall miner can advance under the highwall?

360 meters Signup and view all the answers

What is a key advantage of the highwall miner over auger mining?

Higher production rate Signup and view all the answers

What is the main drawback of auger mining?

Lower coal recovery percentage Signup and view all the answers

What is the mechanism by which coal is extracted in auger mining?

Rotating cutting drum Signup and view all the answers

When is In-Pit Crushing and Conveying (IPCC) used?

When system capacities increase Signup and view all the answers

What do aqueous extraction methods in surface mining use?

Water or liquid solvent Signup and view all the answers

Surface Mining Mechanical Extraction Methods Quiz

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Questions and Answers

What is the primary purpose of auger mining?

What is the main drawback of auger mining?

What is the depth to which auger holes may be drilled?

What is the mechanism by which coal is extracted in auger mining?

What is the primary difference between highwall mining and auger mining?

What is the maximum distance the highwall miner can advance under the highwall?

What percentage of coal recovery is typical for highwall mining?

What is a key advantage of the highwall miner over auger mining?

What is the primary function of a continuous mining system surface miner?

When is In-Pit Crushing and Conveying (IPCC) used?

What do aqueous extraction methods in surface mining use?

What is the common element between highwall mining and auger mining?

What is the primary purpose of auger mining?

What is a key disadvantage of auger mining?

What is the primary difference between open-pit mining and auger mining?

What is the depth to which auger holes may be drilled?

What is the primary difference between highwall mining and auger mining?

What is the primary function of a continuous mining system surface miner?

What is the maximum distance the highwall miner can advance under the highwall?

What is a key advantage of the highwall miner over auger mining?

What is the main drawback of auger mining?

What is the mechanism by which coal is extracted in auger mining?

When is In-Pit Crushing and Conveying (IPCC) used?

What do aqueous extraction methods in surface mining use?

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