DEVELOPMENT METHOD FOR STEEP AND INCLINED DEPOSIT HAVING LOW AND MEDIUM THICKNESS Russian patent published in 2008 - IPC E21C41/22 

FIELD: mining, particularly underground deposit mining.

SUBSTANCE: method involves separating mining level into chambers arranged in staggered order, wherein chambers of each lower level are shifted with respect to ones of upper level for half of chamber width; preparing each mining level and sublevel by lateral drift excavation; forming inclines and cross-drifts to hanging wall of deposit; developing rises from cross-drifts of mining level, which are converted into slot raises; cutting chamber stock to open face. Mining levels are separated into chambers without safety pillar leaving. The chambers are shaped as hexahedrons. Ceilings are fully removed from mining level cross-drifts and are filled with filler. To cut chamber stocks ore level and sublevel drifts are created at lying walls. Inclines are cut from ore sublevel drift so that inclines extend between chambers. Fan-like wells are drilled from ore drifts and mining level stocks are blasted. Ore is drawn from each chamber to slot raise through incline ends in mining level and sublevel.

EFFECT: increased ore deposit thickness, decreased stock preparation and cutting time, as well as reduced mining costs.

2 dwg