M-13.1, r. 2 - Regulation respecting mineral substances other than petroleum, natural gas and brine

Section 103 Disposition versions

2015-12-31

103. Underground worksites with a surface opening shall be filled in with mineral substances and the land levelled so as to be harmonized with the surrounding topography.

Backfill may be replaced by a fence built around the worksite at a sufficient distance from the latter, established according to geotechnical considerations of rocky walls or overlying soils according to the following standards:

(1)  the fence shall be made of 9-gauge galvanized link steel, with openings not exceeding 60 mm on a side;

(2)  the fence shall be at least 2.50 m high and the wire mesh shall be welded to the posts and to the horizontal supports or fixed by fastening straps bolted or riveted or by any other fastening means that will prevent it from being stolen;

(3)  the end and corner posts and the posts supporting gates shall be at least 90 mm in diameter in galvanized steel at least 3.175 mm thick; the others shall be at least 60 mm in diameter in galvanized steel at least 2.54 mm thick. They shall not be more than 3 m apart;

(4)  the top rail used as a horizontal support shall be a pipe at least 45 mm in diameter in galvanized steel at least 3.556 mm thick;

(5)  the end and corner posts and the posts supporting gates shall be fit with braces composed of a galvanized steel pipe at least 45 mm in diameter and at least 2.54 mm thick. The braces must be installed at mid-height between the top rail and the bottom of the netting;

(6)  the concrete must have a strength of at least 20 MPa in 28 days, a maximum slump of 100 mm and 5% to 7% of entrained air. The maximum size of coarse aggregate must be 19 mm;

(7)  except when posts are inserted in rock, the holes in which posts are inserted shall be 1.20 m deep, at least 300 mm in diameter at the opening and they shall be filled with concrete when the posts are inserted;

(8)  in rock, holes used to hold posts shall be at least 500 mm deep and have the necessary diameter to insert posts and concrete therein;

(9)  gates shall be of the same height as the fence and be equipped with a device that will prevent them from being stolen;

(10)  a 9-gauge tension wire, in galvanized steel, must be installed at the bottom of the fence and affixed to the netting by means of ties made of galvanized steel wire;

(11)  damaged galvanized surfaces and welds shall be covered with zinc-rich paint.

O.C. 1042-2000, s. 103; O.C. 1065-2015, s. 39.

2012-09-01

103. Underground worksites with a surface opening shall be filled in with mineral substances and the land levelled so as to be harmonized with the surrounding topography.

Backfill may be replaced by a fence built around the worksite at a sufficient distance from the latter, established according to geotechnical considerations of rocky walls or overlying soils according to the following standards:

(1)  the fence shall be made of 9-gauge galvanized link steel, with openings not exceeding 60 mm on a side;

(2)  the fence shall be at least 2.50 m high and the wire mesh shall be welded to the posts and to the horizontal supports or fixed by fastening straps bolted or riveted or by any other fastening means that will prevent it from being stolen;

(3)  the end and corner posts and the posts supporting gates shall be made of galvanized steel 90 mm in diameter; the others shall be 60 mm in diameter and shall not be more than 3 m apart;

(4)  the top rail used as a horizontal support shall be made of galvanized steel pipe at least 45 mm in diameter;

(5)  except when posts are inserted in rock, the holes in which posts are inserted shall be 1.20 m deep, 300 mm in diameter at the opening and they shall be filled with concrete when the posts are inserted;

(6)  in rock, holes used to hold posts shall be at least 500 mm deep and have the necessary diameter to insert posts and concrete therein;

(7)  gates shall be of the same height as the fence.

O.C. 1042-2000, s. 103.