Match the special methods of shaft sinking with rock mass conditions and scope of application.
| Special methods | Rock mass condition | Scope of application |
|---|---|---|
| A. Shaft boring | P. Loose ground without intrusion of hard rocks or boulders | 1. Any depth |
| B. Cement grouting | Q. Highly jointed rock filled with water | 2. Up to 30 m from surface |
| C. Caisson method | R. All types of water bearing rocks | 3. Up to 1000 m |
| D. Freezing | S. Moderately strong rocks | 4. Less than 600 m from surface |
(A) A-S-3, B-R-2, C-Q-1, D-P-4
(B) A-P-2, B-Q-1, C-S-4, D-R-3
(C) A-R-3, B-P-1, C-S-2, D-Q-4
(D) A-S-4, B-Q-1, C-P-2, D-R-3
A-S-3, B-R-2, C-Q-1, D-P-4
A-P-2, B-Q-1, C-S-4, D-R-3
A-R-3, B-P-1, C-S-2, D-Q-4
A-S-4, B-Q-1, C-P-2, D-R-3
India's No. 1 test series for GATE Mining exam
© 2024-2025 examtestseries.com
All rights reserved.