| Mining Method | Operation |
| a. Bord and Pillar | 1. Long hole radial drilling |
| b. Sublevel caving | 2. Splitting and Slicing |
| c. Longwall retreating | 3. Loosening under strata pressure |
| d. Integrated Caving | 4. Mechanical cutting |
A. a-1, b-4, c-3, d-2
B. a-2, b-3, c-1, d-4
C. a-4, b-2, c-3, d-1
D. a-2, b-1, c-4, d-3
Answer: Option D
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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