SCHEDULE 1Support System Standards for Coal Mines
1
In the case of face workings where props are used—
a
the maximum distance between props in the same row must be 1.2 metres;
b
the maximum distance between adjacent rows of props must be 1.2 metres;
c
the sum of the distances between the props in the same row and between adjacent rows of props must not exceed 2.1 metres;
d
the bars must always be used above the props where the extracted height exceeds 0.6 metres; and
e
the maximum distance between the row of props closest to the face and the face must be—
i
where an armoured conveyor is used and persons do not normally work on the face side of the conveyor, 2 metres; and
ii
in all other cases when filling or loading at the face has been completed, 0.9 metres.