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

Section 418 Disposition versions

2013-07-11

418. Where explosives are kept underground, they must be stored in a magazine

(1)  constituted of at least one chamber;

(2)  having a steel door at least 6 mm (0.23 in.) thick and opening only outwards where the magazine is built on or after 1 April 1993;

(3)  mechanically or naturally ventilated by air intakes at least 0.06 m2 (93 sq. in.) in area located at the top and bottom of the wall of the magazine; the intakes must be capable of providing at least one change of air per hour and be equipped with a spark arrester;

(4)  whose openings, other than those referred to in subparagraphs 2 and 3, must be closed by a shotcrete and reinforced concrete wall at least 152 mm (6 in.) thick or by a concrete wall or concrete block wall at least 300 mm (11.8 in.) thick;

(5)  whose walls must be lined so as to prevent any rock from coming loose.

However, explosives used underground may be stored in a recess:

(1)  excavated in a rocky wall whose floor is located at least 1 m (3.3 ft) from the floor and roof at the most 2.5 m (8.2 ft) of the floor of the travelway;

(2)  with a wooden floor;

(3)  with at least one wooden door;

(4)  where the quantity of explosives is not more than 250 kg (551.1 lb)

(5)  located in accordance with section 424, with the exception of subparagraph c of subparagraph 1 of that section; in that case, the distance between the recess and a working face shall be:

(a)  at least 60 m (196.8 ft) measured in a straight line from the recess to the working face; or

(b)  at least 60 m (196.8 ft) according to the opening the distance between the recess and the working face of which is the shortest, on condition that the thickness of the rock between those 2 points is at least 15 m (49.2 ft);

(6)  identifiable in accordance with subparagraph 5 of the first paragraph of section 415 in respect of underground storage.

Explosives used underground may also be stored in a box made of non-sparking material placed in a recess. In such a case, subparagraphs 2 and 3 of the second paragraph do not apply to the recess.

O.C. 213-93, s. 418; Erratum, 1993 G.O. 2, 2603; O.C. 1326-95, s. 80; O.C. 1236-98, s. 24; O.C. 42-2004, s. 18; O.C. 221-2009, s. 31; O.C. 621-2013, s. 7.

2012-09-01

418. Where explosives are stored underground, they shall be stored in a magazine constituted of at least one chamber:

(1)  having a steel door at least 6 mm (0.23 in) thick and opening only towards the outside of the chamber where the magazine is built on or after 1 April 1993;

(2)  mechanically or naturally ventilated by air intakes at least 0.06 m2 (93.0 in2) in area located at the top and bottom of the chamber; the intakes shall be capable of providing at least one change of air per hour and shall be provided with a spark arrester;

(3)  whose openings, other than those mentioned in subparagraphs 1 and 2 of this paragraph, shall be closed by a concrete wall or concrete block wall at least 300 mm (11.8 in) thick;

(4)  whose walls shall be lined so as to prevent any rock from coming loose.

However, explosives used underground may be stored in a recess:

(1)  excavated in a rocky wall whose floor is located at least 1 m (3.3 ft) from the floor and roof at the most 2.5 m (8.2 ft) of the floor of the travelway;

(2)  with a wooden floor;

(3)  with at least one wooden door;

(4)  where the quantity of explosives is not more than 250 kg (551.1 lb)

(5)  located in accordance with section 424, with the exception of subparagraph c of subparagraph 1 of that section; in that case, the distance between the recess and a working face shall be:

(a)  at least 60 m (196.8 ft) measured in a straight line from the recess to the working face; or

(b)  at least 60 m (196.8 ft) according to the opening the distance between the recess and the working face of which is the shortest, on condition that the thickness of the rock between those 2 points is at least 15 m (49.2 ft);

(6)  identifiable in accordance with subparagraph 5 of the first paragraph of section 415 in respect of underground storage.

Explosives used underground may also be stored in a box made of non-sparking material placed in a recess. In such a case, subparagraphs 2 and 3 of the second paragraph do not apply to the recess.

O.C. 213-93, s. 418; Erratum, 1993 G.O. 2, 2603; O.C. 1326-95, s. 80; O.C. 1236-98, s. 24; O.C. 42-2004, s. 18; O.C. 221-2009, s. 31.