Q248
Which mining layout includes rooms and pillars of unmined ore?
A.
Shrinkage stoping
B.
Room and pillar
AnswerC.
Block caving
D.
Sublevel caving
Answer: Option B
Solution
Answer: Option B
Solution:
Room and pillar leaves parts of the ore as pillars for support.The correct answer is: Room and pillarCommon in coal and flat-lying bedded deposits.Pillars may be later recovered in retreat mining.