Distance Quick Reference
Regulatory distance requirements per NB Reg 91-191
Critical Distances
Blasting area boundary from blast site
s.14650 m
Minimum clearance zone for all blasting operations
Separation between explosives and detonators
s.15350 m
During storage and handling at blast site
No smoking near explosive storage
s.151(c)30 m
From any magazine or storage area
Drilling near loaded holes
s.1581.5× depth OR 6.5 m min
Whichever distance is greater
Misfire approach wait time
s.16915 min
Minimum wait after last expected detonation
Lightning storm clearance
s.162300 m
All personnel from loaded holes during electrical storms
Important Distances
No smoking during explosives handling
s.151(c)15 m
During loading, priming, or handling operations
Warning signs from blasting area
s.163100 m
Posted on all access roads and approaches
Radio transmission restriction (electric blasting)
s.16115 m
From electric detonator circuits
Other Distances
Vehicle parking from loading area
s.15525 m
Non-essential vehicles during loading operations
Table View
| Requirement | Distance | Section |
|---|---|---|
| Blasting area boundary from blast site | 50 m | s.146 |
| Separation between explosives and detonators | 50 m | s.153 |
| No smoking near explosive storage | 30 m | s.151(c) |
| No smoking during explosives handling | 15 m | s.151(c) |
| Drilling near loaded holes | 1.5× depth OR 6.5 m min | s.158 |
| Warning signs from blasting area | 100 m | s.163 |
| Radio transmission restriction (electric blasting) | 15 m | s.161 |
| Vehicle parking from loading area | 25 m | s.155 |
| Misfire approach wait time | 15 min | s.169 |
| Lightning storm clearance | 300 m | s.162 |
Reference: NB Reg 91-191 Part XII