7 CCR 1101-9-6-4 - Safety Fuse Initiation of Blasts
(A) A safety
fuse that is deteriorated or damaged in any way shall not be used.
(B) The hanging of safety fuse on nails or
other projections which will cause a sharp bend to be formed in the fuse is
prohibited.
(C) Before assembling
fuse detonators and safety fuse, a short length shall be cut from the end of
the supply reel so as to assure a fresh cut end in each fuse
detonator.
(D) Only cap crimpers
specifically designed for the purpose of crimping caps shall be used for
attaching fuse detonators to safety fuse. Crimpers shall be kept in good repair
and accessible for use.
(E) No fuse
detonators and safety fuse shall be assembled, or primers made up, in any
magazine or near any possible source of ignition or initiation.
(F) The assembly of fuse detonators, safety
fuse and making of primers shall only be done in a place selected for this
purpose and at least 100 feet away from any storage magazine.
(G) The burning rate of the safety fuse in
use at any time shall be measured, posted in conspicuous locations, and brought
to the attention of all workers concerned with blasting.
(H) New rolls of fuse shall be tested for
burn rate prior to use and all partial rolls shall be tested at least every 30
days. A record of the burn rate shall be kept by the permittee.
(I) The length of safety fuse shall be in
accordance with the manufacturer's recommendations. In no case shall the length
of fuse be less than 3 feet and shall not have a burn time of less than 120
seconds at the time of initiation.
(J) Lighting of safety fuse shall be done
with hot wire lighters, pull-wire lighters, thermalite connectors, or igniter
cord and thermalite connectors.
(K)
Matches, cigarette lighters, cigarettes, pipes, cigars or other unsafe means
shall not be used to ignite safety fuse.
(L) Igniters shall be used in accordance with
the manufacturer's recommendations and shall not be attached to a safety fuse
until the charge is at the blast site and the crew is fully prepared to light
the charge.
(M) At least two
persons shall be present when fuse detonator and safety fuse blasting is done
by hand-lighting methods.
(N) When
blasting with safety fuses, consideration shall be given to the length and
burning rate of the safety fuse and shall be used in accordance with the
manufacturer's recommendations. A sufficient time of not less than 120 seconds,
with a margin of safety, shall always be provided for the blaster to reach a
place of safety.
(O) No more than
12 safety fuses shall be lit by each blaster when hand lighting devices are
used. However, when two or more safety fuses in a group are lit as one by means
of igniter cord or other similar fuse-lighting devices, they may be considered
as one fuse.
(P) Fuse detonators
and safety fuse shall not be used for firing mud cap charges unless charges are
separated sufficiently to prevent one charge from dislodging other shots in the
blast.
(Q) Only sufficient primers
for one day's use shall be made up at a time.
(R) Any loose cartridges of explosives,
detonators, primers and assembled fuse detonators and safety fuse unused at the
end of the shift shall be returned to their respective and separate magazines
and locked up.
(S) Safety fuse
shall not be used in blasting operations in populated areas, public areas, on
highways or adjacent to roads open to traffic.
(T) When the fuse lighter has been ignited,
the blaster shall assume initiation of the safety fuse has occurred.
(U) If the safety fuse does not show evidence
of initiation, the blaster shall not attempt any further initiation and retreat
to a safe location for at least one hour.
(V) When safety fuse is used, workers shall
not return to a misfire for at least one hour.
(W) If explosives are suspected of burning,
all persons in the endangered area shall move to a safe location and no one
shall return to the area for at least one hour after signs of burning have
ceased.
Notes
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No prior version found.