Q89
What does "face advance" refer to in tunneling?
A.
Speed of muck removal
B.
Rate of explosive loading
C.
Distance the tunnel front progresses
AnswerD.
Ventilation increase
Answer: Option C
Solution
Answer: Option C
Solution:
Face advance is the measure of how far the tunnel is extended after each blast or round.The correct answer is: Distance the tunnel front progressesIt's an indicator of development rate and efficiency.Typically measured in meters/day.