METHOD OF CHAMBERS VENTILATION IN MINING THICK BED BY CHAMBER SYSTEM Russian patent published in 2002 - IPC

FIELD: mining industry; applicable in chamber ventilation, particularly, in mining of gypsum deposits. SUBSTANCE: method is characterized by the fact that fresh air is supplied from haulage drift due to general mine depression to the first working chamber of extraction block. Air from said block passes through interchamber connections along all working chambers and reaches breakage faces with the help of air turbulators which are installed behind interchamber connections nearest to breakage faces. As breakage faces advance interchamber connections between the first and second, and also previous and the last working chambers of extraction block, except for connections the nearest to breakage faces, are sealed by air stoppings. Faul air from breakage faces is withdrawn through interchamber connections to the last working chamber of extraction block from which, it passes through ventilation connection to district vent drift. To preclude leakage of fresh air to haulage drift, air stoppings are installed between the first and second, last bu one and last chambers of extraction block. Width of chamber mouth is equal to width of these chambers. EFFECT: higher efficiency of ventilation working chambers within extraction district, provision of safety for workers, and reduced capital and operation costs. 2 dwg