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

FIELD: mining. SUBSTANCE: in mineral hydraulic borehole mining from diamond pipes with complicated structure in form of column of endolithic breccias in ring of xenotuff breccias with inclusion of fault breccias, the producing well is sunk beyond the pipe limits and auxiliary well is arranged diametrically to pipe. Pipe is divided into parts by system of underground workings with formation of levels. Mineral is disintegrated by levels in two stages. Disintegration at first stage is accomplished by abrasive washing of xenotuff breccias, and at the second stage, by caving column of endolithic breccias by its undercutting at the horizon of receiving chambers and transportation of endolithic breccias through underground mine workings. Formed in crater part of pipe is protective pillar. Column of endolithic breccias are supported within the range of level height during disintegration of xenotuff breccias by rigid pinching of column, by intervals, with the help of casing strings of inclined wells for contacting strings of neighboring wells with walls of column at alternate angle. Fault breccias are left in worked out space. EFFECT: higher efficiency. 2 cl, 5 dwg