- Two blast holes in same row
- Distance between two holes blasted at same delay
- Distance between first row of blast holes and bench crest
- Distance between two holes blasted in consecutive delay
- 120 dB (A)
- 130 dB (A)
- 140 dB (A)
- 115 dB (A)
- 90 dB (A)
- 85 dB (A)