BLOCK VENTILATION METHOD FOR TOP SLICING DEVELOMENT SYSTEM Russian patent published in 2005 - IPC

FIELD: mining industry, particularly ventilation of mines or tunnels during bauxite deposit development.

SUBSTANCE: method involves supplying pure air from field haulage roadway through blind drift of transport horizon into ore rising one due to mine depression; feeding part of air from rising horizon in intermediate blind drift; directing remaining pure air in layered air supply drift and then to entry ways for venting thereof; removing contaminated air through previously developed entry ways in layered venting drifts arranged in exhausted space at deposit ground along the strike; directing contaminated air through venting rises arranged in exhausted space along block boundaries at deposit ground to field venting drift drilled under deposit ground along the strike at venting horizon level and blind drift of venting horizon to field venting drift; supplying pure air from intermediate blind drift to field rise and then to field venting drift through blind drift of venting horizon. Intermediate blind drift and field rise are adapted to evacuate miners in emergency conditions.

EFFECT: increased efficiency and miner's safety due to changing pure and contaminated air mass flow within the boundaries of the block.

3 dwg