Depending on the decreasing ability of surrounding rock to store strain energy, the underground metal mining methods can be ordered as
A. Cut-and-fill stoping, Sublevel caving, Sublevel open stoping, Block caving
B. Sublevel open stoping, Cut-and-fill stoping, Sublevel caving, Block caving
C. Sublevel caving, Sublevel open stoping, Cut-and-fill stoping, Block caving
D. Block caving, Sublevel caving, Sublevel open stoping, Cut-and-fill stoping
Answer: Option B
This Question Belongs to Mining Engineering >> Introduction To Mining Engineering
A. Normal distribution
B. Skewed distribution
C. Lognormal distribution
D. Poisson distribution
A. 3 level heading district
B. 4 level heading district
C. 5 level heading district
D. 6 level heading district
It is very difficult to control shaley roof if coal is not left with the shale why?
A. It is weak in nature
B. It has weathering effect
C. It has great affinity to absorb moisture and get departed from immediate roof
D. It reacts with coaly surface
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