METHOD OF VENTILATION OF OPEN PITS Russian patent published in 2024 - IPC E21F1/08 F24F13/02 

FIELD: ventilation.

SUBSTANCE: invention relates to a method for ventilation of open pits. Method includes air supply to the mined-out space by means of bypass turbojet engine, which is placed on day surface, with connected to it ventilation channel, connecting mined-out space of open pit with cold circuit of bypass turbojet engine. Heated gas-air mixture is supplied through pipeline arranged inside ventilation channel and connecting hot circuit of bypass turbojet engine with atmosphere and ventilation channel. Controlling the temperature of the air flow supplied to the mined-out space of the pit, for which changed are the flow cross-sections of the valve installed outside the pipeline at the point of mixing the air flows of the hot and cold circuits and connecting the ventilation channel to the atmosphere and the branch pipe connecting the pipeline to the atmosphere, changing the opening degree of a shutter installed in the pipeline after the branch pipe. In the warm season, the pipeline is shut off with the help of a shutter. Hot circuit air flow is released from pipeline through its branch pipe into atmosphere.

EFFECT: wider field of application due to control of temperature of air supplied to the pit in cold season and supply of unheated air in warm season.

1 cl, 2 dwg