PIT VENTILATION METHOD Russian patent published in 2012 - IPC E21F1/18 

FIELD: mining.

SUBSTANCE: method involves installation of ascending air pipeline channels on board and beyond the limits of the pit and their connection by main air pipeline channels, arrangement of suction holes of air pipeline channels in working zones of the pit, creation of natural draft in channels due to wind head and air temperature difference inside and outside the channels, movement of contaminated air along channels beyond the pit levels and control of its flow. During winter time the movement of contaminated air from ascending channels installed aboard the pit to ascending channels located beyond the pit limits is performed along bypass air pipeline channels flooded in natural water sources. Control of the air flow removed from the pit is provided by changing the ratio of air flow rates in bypass and main channels.

EFFECT: increasing pit ventilation efficiency.

1 dwg