What is a shaft in mining?
B
A vertical or inclined passage to access underground mines
Analysis & Theory
A shaft is a vertical or steeply inclined excavation used to access underground ore bodies.
Which of the following shafts is used mainly for transporting ore and waste rock?
Analysis & Theory
Hoisting shafts are designed to lift ore and waste rock to the surface.
Which equipment is used to transport miners and materials through shafts?
Analysis & Theory
A skip is a container used in hoisting systems for transporting materials in shafts.
What is the purpose of a ventilation shaft?
C
To supply fresh air and exhaust gases
Analysis & Theory
Ventilation shafts are used to circulate fresh air and remove harmful gases in underground mines.
Which method is commonly used for sinking shafts?
Analysis & Theory
Shaft boring is a method used to excavate vertical or inclined shafts in rock.
What is a headframe in shaft mining?
C
Structure above the shaft housing hoisting equipment
Analysis & Theory
A headframe is a structural frame above a shaft that supports hoisting equipment.
Which safety device prevents a falling cage in a shaft?
Analysis & Theory
Safety dogs engage automatically to prevent the cage from falling if the hoisting rope breaks.
What is lining in shaft construction?
B
Reinforcement of shaft walls
Analysis & Theory
Lining is done to support and stabilize the shaft walls and prevent collapse.
Which of the following is a challenge in shaft sinking?
C
Water inflow and unstable ground
Analysis & Theory
Water ingress and unstable geology are major issues faced during shaft construction.
Which of the following is a benefit of using a shaft over an adit?
C
Access to deep ore bodies
D
Used in open-pit mining
Analysis & Theory
Shafts are ideal for accessing deep underground ore that can't be reached by adits or ramps.