METHOD FOR VENTILATION OF UNDERGROUND MINE WORKINGS Russian patent published in 2017 - IPC E21F1/08 

FIELD: mining engineering.

SUBSTANCE: method includes supply of external atmospheric air into a shaft well by a fan. Fresh air is supplied from day surface via heat-insulated vertical or inclined air duct, and outgoing air heated in underground mine workings is removed from the shaft along an annular channel formed between the well walls and the air duct. The well is developed so that the intersection of the well with the underground mine workings is in the fresh air stream direction to the area of operations ventilated by means of a partial section scheme or other working zone. The fresh air stream entering through the well air duct is mixed with air which is supplied from the mine ventilation system by depressing the fan of the main mine ventilation unit. A chamber with adjustable air gates is installed on the heat-insulated air duct at the intersection of the well with underground mine workings. The chamber directs the flow of air via the air supply line of untreated air to the area of operations or to the working zone or without additional heating, or via an air duct supplying air for further heating and a ventilation working with outgoing stream available at the exit from the area or working zone. The air directed for heating through the air duct and via the insulating bulkhead is sent through the air duct passing through the ventilation working, and distributed by a collector through a tube bank, in which the heated outgoing air is heated up to + 30…50°C, then the heated air is returned via the air duct to the insulating bulkhead, get accumulated in the collector, and sent via the air duct with adjustable air gate to the air duct for supplying the untreated air. A louver-type air controller with pedestrian passage installed at air outlet from an area of sectional ventilation in the ventilation working with outgoing stream passes a part of air further into the ventilation working, and the rest air portion enters through the air duct to the intersection of the well and the workings and escapes to the day surface through the annular channel, after that it is sent to the heating system of the fan inlet channel and after its passage, it is released into the atmosphere or directed for further disposal, for example, in a boiler house.

EFFECT: improvement of the method.

2 cl, 1 dwg, 1 ex