METHOD FOR PREVENTING FLOODING OF POTASSIUM MINES Russian patent published in 1999 - IPC

FIELD: mining industry. SUBSTANCE: according to method, bore-hole is drilled from surface to upper contact of water-passing passage between water-bearing horizon and underground workings. After determining connection between brine appearance in underground working and abovebrine water in area of disturbed water-protective depth, two bore-holes are drilled from surface and are cased them with pipes. Filters are installed in these bore-holes. Filters are positioned at level of brine horizon. Distance between bore-holes is determined by parameters of zone of disturbance of water protective depth located between them. It varies within range of 10-100 m. Determined is level of brine in bore-holes. Plugging slurry is injected into one of wells which is located upstream of flow. Brine is pumped out from other bore-hole. Injection of plugging solution and pumping-out of brine are started simultaneously and carried out continuously each at constant flow rate. Pumping-out flow rate exceeds injection flow rate by 2-4 times. This allows for reaching hydrodynamic equalization of bed volume being treated. Application of aforesaid method enhances reliability in prevention of flooding. EFFECT: higher efficiency. 3 dwg