Q215
Which layout is common in sublevel stoping?
A.
Retreat and fill
B.
Multiple ore passes
C.
Vertical crater retreat
D.
Drill fan pattern
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Sublevel stoping uses fan drilling from sublevels into the ore body.The correct answer is: Drill fan patternAllows precise blasting and ore extraction.Suitable for steep, competent ore bodies.