Wash. Admin. Code § 296-52-67085 - Loading blast holes
(1)
Power lines and portable electric cables. Power lines and portable
electric cables must be kept at a safe distance from explosives or blasting
agents being loaded into drill holes.
(2)
Equipment, machinery, and tools.
(a) Any machine or tool not being used to
load holes must be removed from the immediate loading area.
(b) Equipment cannot be operated within
fifty feet of loaded holes except when:
(i)
It is needed to add burden or mats;
(ii)
Tracking drills out of the loading area.
(3)
Holes that may be
loaded. Only holes that will be fired in the next blasting round may be
loaded.
(4)
Tamping.
(a) A primer must never be tamped.
(b) Tamping must be done with wood rods or
approved plastic tamping poles that do not have exposed metal parts.
(c) Nonsparking metal connectors may be used
for jointed poles.
(d) Violent
tamping must be avoided.
(5)
Pneumatic loading. When loading blasting agents
pneumatically over primed boosters:
(a) A
semiconductive delivery hose must be used;
(b)
Equipment must be bonded and grounded.
(6)
Stemming. All blast holes
in open work must be stemmed to:
(a) The
collar; or
(b) A point, which will
confine the charge.
(7)
Attendance of holes. Loaded holes must be attended or
protected.
(8)
Unused
explosives. After loading, all remaining explosives and detonators must
be immediately returned to an authorized magazine or day box.
Notes
Statutory Authority: RCW 49.17.010, [49.17].040, and[49.17].050 . 02-03-125, § 296-52-67085, filed 1/23/02, effective 3/1/02.
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
(1) Power lines and portable electric cables. Power lines and portable electric cables must be kept at a safe distance from explosives or blasting agents being loaded into drill holes.
(2) Equipment, machinery, and tools.
(a) Any machine or tool not being used to load holes must be removed from the immediate loading area.
(b) Equipment cannot be operated within fifty feet of loaded holes except when:
(i) It is needed to add burden or mats;
(ii) Tracking drills out of the loading area.
(3) Holes that may be loaded. Only holes that will be fired in the next blasting round may be loaded.
(4) Tamping.
(a) A primer must never be tamped.
(b) Tamping must be done with wood rods or approved plastic tamping poles that do not have exposed metal parts.
(c) Nonsparking metal connectors may be used for jointed poles.
(d) Violent tamping must be avoided.
(5) Pneumatic loading. When loading blasting agents pneumatically over primed boosters:
(a) A semiconductive delivery hose must be used;
(b) Equipment must be bonded and grounded.
(6) Stemming . All blast holes in open work must be stemmed to:
(a) The collar; or
(b) A point, which will confine the charge.
(7) Attendance of holes. Loaded holes must be attended or protected.
(8) Unused explosives. After loading, all remaining explosives and detonators must be immediately returned to an authorized magazine or day box.
Notes
Statutory Authority: RCW 49.17.010, [49.17].040, and[49.17].050 . 02-03-125, § 296-52-67085, filed 1/23/02, effective 3/1/02.