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MINES ACT (NORTHERN IRELAND) 1969 - SECT 59

Prevention of leakage of air between airways.

59.(1) Where, of any two lengths of different passages in a mine of coal,
stratified ironstone, shale or fireclay, one is made after the commencement of
this Act (whatever the date of the making of, or of any part of, the other),
then, unless there is (without any steps being taken for the purpose of
minimising the leakage of air between them) no, or no appreciable, leakage of
air between them, it shall not be lawful to use one as, or as part of, an
intake airway and the other as, or as part of, a return airway unless such
steps are taken as are necessary for the purpose of minimising the leakage of
air between them.

(2) Nothing in subsection (1) shall render unlawful the use as, or as part of,
an airway of so much of any passage in a mine as lies within the
relevant distance from a working face to which air is supplied or from which
air is drawn off through that airway.

(3) For the purposes of subsection (2)

(a)the expression "relevant distance" means, in relation to a working face in
a mine, four hundred and fifty feet (measured from any point on that face in a
straight line on any plane) or such other distance, so measured (whether
greater or less than four hundred and fifty feet), as may, in any particular
case, be determined by the Ministry by notice served on the manager of the
mine; and

(b)the expression "working face" does not include a place in a road at which
ripping or work of repair is in progress.

© 1969 Crown Copyright

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