PART XXIX UNDERGROUND OPERATIONS — Placement of fill material in mine workings
603
(1) An employer shall not place or permit to be placed fill material by hydraulic means in a stope or other mine working before the proposed system for underground transfer, storage, placing, containment and water removal is certified by a professional engineer.
603(2)
Before material containing cyanide is used for back fill in an underground mine, an assessment shall be conducted to determine the precautions to be taken to protect the health and safety of workers.
603(3)
Backfill materials shall be assessed for other hazardous materials to protect the health and safety of workers.
603(4)
Where bulk fill is to be placed, the proposal referred to in subsection (1) shall include written procedures for monitoring fill and water inflows, drainage, saturation calculations and hydrostatic pressure on confining bulkheads.
603(5)
Where bulk fill is to be placed, an employer shall ensure that
603(a)
the proposed system referred to in subsection (1) and subsection (4) is constructed, operated, monitored and maintained in accordance with the certified design;
603(b)
records are maintained of the quantity of fill placed, the quantity of water inflow and outflow, and observations of hydrostatic pressures; and
603(c)
written procedures are developed assigning responsibilities and action levels, where
603(i)
blasting is conducted in the immediate area, (ii) saturation of the fill mass exceeds 90%, or (iii) hydrostatic pressures reduce the effective factor of safety of bulkheads below 5.
603(6)
When material is dumped from a vehicle that is occupied by a person, the dump point shall include features designed to prevent the vehicle from going over the bank, into a raise or other open hole.
Not legal advice. Verify the cited article against the signed agreement.