Match the following:
| Mining system | Face supports |
| a. Mechanized longwall in flat seam | 1. Cable bolting |
| b. Blasting gallery method | 2. Shield support |
| c. Mechanized longwall in steep seam | 3. Alpine breaker line support |
| d. Wangawilli method for 3 m thick coalseam | 4. Troika shield support |
A. a-2, b-1, c-4, d-3
B. a-4, b-1, c-3, d-2
C. a-4, b-2, c-3, d-1
D. a-2, b-3, c-4, d-1
Answer: Option A
This Question Belongs to Mining Engineering >> Introduction To Mining Engineering
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