Ventilating district definition
Ventilating district means such part of a mine below ground as has an independent intake airway commencing from a main intake airway, and an independent return airway terminating at a main return airway, and, in the case of a mine or part thereof which is ventilated by natural means, the whole mine or part; and
Ventilating district means such part of a mine as has an independent intake commencing from a main intake air-course and an independent return air-way terminating at a main return air-course;
Ventilating district means any part of a seam having an independent intake airway commencing from a main intake airway, and an independent return airway terminating at a main return airway :