METHOD OF VENTILATING BLIND WORKING Russian patent published in 2018 - IPC E21F1/08 

FIELD: mining.

SUBSTANCE: invention relates to the mining industry and can be used in ventilation of blind workings of mines and pits. Method comprises feeding an air stream through a mine working, collecting part of the air stream by a local ventilation fan and feed said part through a vent line into the blind mine working. Another part of the air stream passing through the local ventilation fan is directed through a ventilation tee into an additional pipeline located in the through mine working, equipped with a confuser with a variable outlet cross-section. Through the confuser, an air jet is formed, which, due to the ejection effect, outputs the surrounding and polluted air that comes from the blind mine working in the course of the air flow in the through mine working. Length of the additional pipeline is determined, depending on the geometric dimensions of the through and blind mine workings necessary for ventilating the air volume and the characteristics of the local ventilation fan.

EFFECT: technical result is high reliability and efficiency of ventilation of a blind mine working by counteracting the recirculation of polluted air from the blind mine working and regulating the amount of air supplied to the near-wellbore space.

1 cl, 5 dwg