Q85
What is a typical application of raise boring?
A.
Shaft collaring
B.
Developing inclined haul roads
C.
Creating smooth vertical holes
AnswerD.
Ore fragmentation
Answer: Option C
Solution
Answer: Option C
Solution:
Raise boring drills a small pilot hole, then enlarges it to full diameter.The correct answer is: Creating smooth vertical holesUsed for ventilation shafts, ore passes, and service holes.Safer and faster than conventional raises.