METHOD OF VENTILATION OF DEEP OPEN PITS Russian patent published in 2001 - IPC

FIELD: mining industry. SUBSTANCE: method includes development of open pit by a system of underground mine workings and organization of air exchange between open pit atmosphere and environment by forcing or exhausting the air through underground mine workings with the help of ventilation plants. Air exchange is effected through pipeline lighter that air which are moved in worked-out space of open pit. EFFECT: higher efficiency of ventilation due to increased radius of zone of active action of airways on open pit atmosphere. 2 cl, 1 dwg