- Free face to the holes blasted at first delay
- For better alignment by providing the center line
- For gas pressure release
- None of the above
- 120 dB (A)
- 130 dB (A)
- 140 dB (A)
- 115 dB (A)
- 90 dB (A)
- 85 dB (A)
Q) Uncharged hole in burn cut blasting pattern helps in providing
Solution:
(a) Free face to the holes blasted at first delay
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