Mine Development And Mining Methods - Study Mode

[#246] Which of the following is a horizontal opening used for drainage or access?
Correct Answer

(C) Adit

Explanation

Solution: Adit is a horizontal or nearly horizontal passage driven from the surface.The correct answer is: AditUsed for access, drainage, and ventilation.Shafts are vertical
raises and winzes are internal vertical workings.

[#247] Which factor determines shaft depth selection over a decline?
Correct Answer

(C) Depth of ore body

Explanation

Solution: Ore body depth strongly influences the choice between shaft and decline.The correct answer is: Depth of ore bodyDeclines are economical up to 1 km
deeper mines prefer shafts.Shafts are faster for vertical transport at depth.

[#248] Which opening is primarily designed for haulage in underground metal mines?
Correct Answer

(B) Drift

Explanation

Solution: Drift is a horizontal tunnel following the vein or used for transport.The correct answer is: DriftIt connects levels, loading points, and ore passes.Vent raises serve airflow
winzes are vertical.

[#249] Which of the following is a blind vertical shaft?
Correct Answer

(C) Winze

Explanation

Solution: Winze is a vertical or inclined shaft sunk from underground.The correct answer is: WinzeIt connects lower levels and is not visible from the surface (hence blind).Raise goes upward
adit is horizontal from surface.

[#250] Which of the following is used to control dust in underground mines?
Correct Answer

(C) Water sprays

Explanation

Solution: Water sprays are used to suppress dust at sources.The correct answer is: Water spraysThey reduce airborne particles during drilling, blasting, and loading.Rock bolts and shotcrete stabilize rock
conveyors transport ore.