Q82
What is the term for a horizontal underground opening made at the lowest level to drain water?
A.
Crown pillar
B.
Main haulage level
C.
Pump chamber
D.
Drainage adit
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Drainage adit is a horizontal tunnel designed to remove water via gravity.The correct answer is: Drainage aditEspecially common in older mines to reduce pumping needs.Positioned below the lowest active level.