METHOD FOR OPENING AND PROCESSING DEEP HORIZONS OF KIMBERLITE PIPES Russian patent published in 2004 - IPC

FIELD: mining industry.

SUBSTANCE: method includes excavation of a quarry up to end contour, construction of quarry border walls at steep angles, freeze-protective covering of shelves slopes, processing of rocks, transporting of it by dump-trucks along the horizon, connected by ore chutes, cross-cuts to slanting spiral-like shaft. Cross-cuts pass from portions of maximum approach of spiral-like shaft to contour of ore body, in mouth portion of ore chute a special construction is formed for centering ore flows, for dump-trucks unloading, slopes of quarry border walls are planed by machines with working organs of rotor-cutting type, covered by freeze-protective gunite layer with variable thermal resistance and is fixed by anchors, processing of central portion of quarry horizons is performed by horizontal shelves, and periphery portions - by shelves slanted to side of quarry border wall, for forming special slanted safety benches.

EFFECT: higher effectiveness and safety of mining during excavation of deep horizons of deposits by open method under conditions of permafrost.

9 dwg, 1 ex, 8 tbl