1. It is a subordinate method combining features of both room and pillar and long wall.
2. What is the suitable distance of location of heavy type of barriers from farthest face?
3. How much of stone dust is required per square meter cross-sectional area of gallery for heavy type of barriers?
4. Incubation period is NOT related to
5. In contiguous seam working, the 2 seams must be within A m of each other. A is given by
6. Setting pressure and yielding pressure is related with
7. Gassy seam of 'third degree' means a coal seam or part lying within the precincts of mine not being an opencast working where the rate of emission of inflammable gas per ton of coal produced exceeds
8. A Zn deposit is formed by a geological process is called
9. Which of the following is called ROI?
10. Which of the following excavator is preferred to be used for a bench height of 30 m or more?
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