PART XXIX UNDERGROUND OPERATIONS — Plotting of diamond drill holes

The employer shall establish a written procedure by which all workers involved are advised of the intersection of a diamond drill hole before the heading is within 8 metres of the intersection.

The employer shall mark the collar and points of intersection of the drill holes referred to in subsection (1)

at the time when drilling is discontinued or an intersection made; and drilled from the surface to a depth of at least 30 metres below an elevation at which flows of water might occur, and the grouting shall be done before the hole is abandoned or the casing is pulled; and mining is in progress toward the hole; or

with a single capital letter "H" in a conspicuous paint, measuring at least 300 millimetres in height and within at least 1,200 millimetres of the collar or intersection. drilled from underground which intersect a water source of potential danger to the mine workings and the grouting shall extend at least 30 metres from the water source. blasting is to be done within 5 metres of an intersection of the hole.

The employer shall grout the diamond drill holes

The employer shall ensure that the approach to the collar or to an intersection or breakthrough is securely closed or guarded when