METHOD FOR COOLING AND DRYING OF MINE AIR Russian patent published in 1998 - IPC

FIELD: mining industry. SUBSTANCE: this can be used for regulating temperature of air and for its drying in mines and pits preferably in potassium mines and pits. According to method, air is taken from air feeding entry and is delivered into heat-mass-exchange underground workings through ventilation ducts. Taking place during these operations is redistribution of air in entire mine ventilation system. For this purpose, air is directed from air feeding entry into heat-mass-exchange underground workings by installing blower-ejector in ventilation duct at distance from air feeding entry. This ensures complete spreading of air flow within duct limits towards ventilation entry. With that, blower-ejector maintains velocity of air movement in air feeding entry between ventilation ducts at level not below 0.15 m/s. Size of surface area of heat-exchanging underground workings is determined from mathematical expressions. Aforesaid method allows for maintaining permanent thermodynamic parameters of air through entire length of ventilation route. EFFECT: higher efficiency. 3 cl, 3 dwg