S-2.1, r. 14 - Regulation respecting occupational health and safety in mines

Section 457 Disposition versions

2012-09-01

457. Where electrical blasting takes place:

(1)  no bare junctions in the detonator lead wires and blasting lines may come into contact with each other or with anything else;

(2)  where balanced circuits are necessary, each circuit shall be checked before blasting, using a blasting galvanometer;

(3)  the entire circuit shall be checked in accordance with paragraph 2 before connecting the detonator circuits to the blasting line;

(4)  the blasting line shall be short-circuited when the detonator wires are interconnected and connected to the conductors of the blasting line;

(5)  the short circuit prescribed by paragraph 4 may not be opened until the workmen have reached shelter;

(6)  the worker who interrupts the short circuit prescribed by paragraph 4 shall be sheltered from any projection of a premature explosion;

(7)  the blasting line shall be disconnected from the blasting machine and short-circuited immediately after firing, and where a blasting switch is used, it shall be locked immediately after firing;

(8)  where electrical detonators are used:

(a)  the detonator wires may not be shortened;

(b)  the detonator wires may not be thrown to untangle them;

(c)  radio transmitters and cellular telephones shall be turned off within 20 m (65.6 ft) of the blasting site; at least one sign in letters at least 102 mm (4.0 in) high must be posted near the site directing that radio transmitters and cellular telephones be turned off.

O.C. 213-93, s. 457; O.C. 460-2000, s. 32; O.C. 221-2009, s. 35.