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Questions and Answers
What is the primary purpose of auger mining?
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?
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?
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?
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 primary difference between highwall mining and auger mining?
What is the maximum distance the highwall miner can advance under the highwall?
What is the maximum distance the highwall miner can advance under the highwall?
What percentage of coal recovery is typical for highwall mining?
What percentage of coal recovery is typical for highwall mining?
What is a key advantage of the highwall miner over auger 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?
What is the primary function of a continuous mining system surface miner?
When is In-Pit Crushing and Conveying (IPCC) used?
When is In-Pit Crushing and Conveying (IPCC) used?
What do aqueous extraction methods in surface mining use?
What do aqueous extraction methods in surface mining use?
What is the common element between highwall mining and auger mining?
What is the common element between highwall mining and auger mining?
What is the primary purpose of auger mining?
What is the primary purpose of auger mining?
What is a key disadvantage 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 primary difference between open-pit mining and auger mining?
What is the depth to which auger holes may be drilled?
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 difference between highwall mining and auger mining?
What is the primary function of a continuous mining system surface miner?
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 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 a key advantage of the highwall miner over auger mining?
What is the main drawback of auger mining?
What is the main drawback of auger mining?
What is the mechanism by which coal is extracted in auger mining?
What is the mechanism by which coal is extracted in auger mining?
When is In-Pit Crushing and Conveying (IPCC) used?
When is In-Pit Crushing and Conveying (IPCC) used?
What do aqueous extraction methods in surface mining use?
What do aqueous extraction methods in surface mining use?
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