METHOD FOR HYDRAULIC MINING OF MINERALS Russian patent published in 1995 - IPC

FIELD: mining. SUBSTANCE: formed in hydraulic mining of breccias from diamond pipes is protective pillar. Caving is accomplished by slices. In this event, made preliminarily within the caved slices are segment slots from bottom upward from flank holes. Cross-section area of segment slots is increased to form slices of similar shape and cross-section. Drilled from central hole on upper boundary of each slice is a cluster of inclined holes to supply water for hydraulic fracturing of slices and their caving. Made also is large-fragmental disintegration of breccias of caved slice against surface of pulp of receiving chamber with the aid of maintaining an air gap in receiving chamber. Disintegration is effected in dynamics of broken breccia immersion and static conditions of shrinkage. EFFECT: higher efficiency. 2 cl, 3 dwg