METHOD OF ORE DEPOSITS MINING BY SUBLEVEL CAVING Russian patent published in 2011 - IPC E21C41/22 

FIELD: mining.

SUBSTANCE: method includes arrangement of the following at the sublevel - haulage drifts, orts, loading drives, an outpost drift, a ventilation rise entry, and also layer cutting of mine panels by fans of wells in constricted environment, layer discharge of broken rock simultaneously via orts and loading drives under caved rocks, ventilation of mining faces due to mine ventilating pressure. Simultaneously not more than two loading drives are made as actual mining develops. Ore panels of rectangular shape are cut in cross section in layers with thickness proportional to the sublevel height. Ore panels of the lower sublevel are broken layers of ore in them are taken out in staggered order relative to ore panels and layers of broken ore of the upper sublevel. The layerwise discharge of broken ore is carried out in two stages: at first a portion of an ore layer is released until the limit impoverishment is achieved, and the remaining part of the ore layer stock is tied up, then the tied-up part of the ore layer stock is released together with layers of broken rock of the lower sublevel via its orts and loading drives.

EFFECT: increased stability of mines located in the area of abutment pressure effect, reduced scope of preparatory and cutting works, achievement of high indices of ore withdrawal.

2 cl, 3 dwg