- Rotary-percussive drilling
- Percussive drilling
- Rotary drilling
- Hydraulic drilling
- 120 dB (A)
- 130 dB (A)
- 140 dB (A)
- 115 dB (A)
- 90 dB (A)
- 85 dB (A)
Q) Which type of drilling is the reliable way of exploratory drilling carried out prior to Mining?
Solution:
(c) Rotary drilling
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