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

Section 453.1 Disposition versions

2012-09-01

453.1. In the presence of sulphurous rock that may react with explosives placed in the drill hole, the following conditions shall be complied with to prevent predetonation:

(1)  a rock characterization certified by an engineer must first be carried out to ascertain the reaction potential in the presence of the explosives used; and

(2)  if the results indicate a reaction potential, the following measures must be taken:

(a)  hole temperature measurements must be taken before loading the explosives;

(b)  drill holes whose temperature may provoke a reaction of the explosives must not be loaded, unless the temperature is controlled; and

(c)  a written procedure for loading and blasting must be developed and applied; the procedure must include

i.  the loading sequence;

ii.  the maximum delay between the beginning of the loading and the blasting;

iii.  the measures to be taken in case of smoke release from a drill hole that is already loaded or being loaded; and

iv.  the use of inhibitor explosives or other explosives compatible with existing conditions.

O.C. 221-2009, s. 33.