2022 Manitoba Workplace Safety and Health Act and Regulation

34.16(2) Before blasting occurs, an employer must ensure that adequate
precautions are taken against possible injury to persons and damage
to property, including without limitation, ensuring that
(a) the blaster or supervising blaster limits the charge used to the
minimum required to do the blast;
(b) a blasting mat or other suitable means of protection is used to
control flying debris;

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Workplace Safety And Health Regulation
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(c) unauthorized persons are warned not to enter or remain in the
area of the blast site by
(i) the placement of warning signs or barricades, or
(ii) the posting of flagpersons or guards;
(d) roads, trails, paths and other approaches to the blast site are
closed during blasting operations;
(e) the person who controls any railway within the blast site is given
advance notice of the blasting operations to be carried out; and
(f) sufficient warning is given before a blast takes place.
34.16(3) An employer must ensure that the blaster does not fire a charge until
(a) all surplus explosives or detonators are removed from the blast
site; and
(b) all workers and other persons are at a safe distance from the
blast site, or if a worker or other person is required to remain
in the blast site, he or she is protected by suitable cover
from falling rocks, flying debris, mud or anything else that is
disturbed, agitated or displaced by the blast.
34.16(4) An employer must ensure that all boreholes that are charged
with explosives in one loading operation are fired in one blasting
operation.
34.16(5) An employer must ensure that a blaster does not perform a blasting
operation using electric detonators during or on the approach of an
electrical storm or a severe dust storm.