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Surface Mining Mechanical Extraction Methods Quiz

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Surface Mining Mechanical Extraction Methods Quiz

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Questions and Answers

What is the primary purpose of auger mining?

Creating drainage holes for acid-laden water

Preventing surface subsidence and spontaneous combustion

Recovering coal under the highwall after strip mining (correct)

Exploring new coal seams beyond the highwall

What is the approximate coal recovery percentage achieved by auger mining?

Three-quarters

Half

One-third (correct)

Two-thirds

What is a significant disadvantage of auger mining mentioned in the text?

It is expensive compared to other mining methods

About 65% of the reserve (coal) remains in place (correct)

It causes surface subsidence and spontaneous combustion

It has a high success rate in coal recovery

What is the depth to which auger holes may be drilled, as mentioned in the text?

More than 90 m (C) Signup and view all the answers

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

The equipment used (A) Signup and view all the answers

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

360m (C) Signup and view all the answers

What is the approximate coal recovery percentage for highwall mining?

50% (D) Signup and view all the answers

Which machine is NOT used in the Continuous Mining System?

Hydraulic Shovel (C) Signup and view all the answers

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

When haulage distances increase (D) Signup and view all the answers

What is the key factor for success with any IPCC system?

The primary crusher (D) Signup and view all the answers

What do Aqueous Methods in surface mining primarily employ?

Water or liquid solvent (D) Signup and view all the answers

What is the common element shared by highwall miner and continuous mining machine?

Bit-laced cutting drum (D) 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 approximate coal recovery percentage achieved by auger mining?

What is a significant disadvantage of auger mining mentioned in the text?

What is the depth to which auger holes may be drilled, as mentioned in the text?

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 is the approximate coal recovery percentage for highwall mining?

Which machine is NOT used in the Continuous Mining System?

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

What is the key factor for success with any IPCC system?

What do Aqueous Methods in surface mining primarily employ?

What is the common element shared by highwall miner and continuous mining machine?

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