Q210
In raise boring, what is the function of the reamer head?
A.
Drill vertical holes
B.
Guide pilot holes
C.
Enlarge pilot holes
AnswerD.
Pump water
Answer: Option C
Solution
Answer: Option C
Solution:
Reamer head is attached after a pilot hole is drilled.The correct answer is: Enlarge pilot holesRotates from bottom to top, enlarging the raise.Produces smooth, stable openings for ventilation or ore movement.