METHOD FOR COMBINED DEVELOPMENT OF MINERAL DEPOSITS Russian patent published in 2011 - IPC E21C41/00 

FIELD: mining.

SUBSTANCE: initially underground development of rich ores is carried out according to chamber-pillar scheme. At the same time chambers are formed in two stages: initially developed space in chamber contours serves as buffer and levelling reservoir for ore released from pit, and near-contour parts of chambers, processed at the second stage, are filled with hardening (acid-resistant) mixture. After formation of primary chambers, open development is started in stages. Ore from pits of the first stage is released into chambers of the first stage and is exposed to leaching. Afterwards crude ores that remained in pillars are exploded and leached in zone of underground works. Pits of the first stage of open development are formed preferably by rich ores and favourable sections of relief, ore from pits of the second stage is stored in developed space of pits of the first stage and exposed to heap leaching.

EFFECT: increased efficiency of ores production and provision of mining works safety in seismic-active regions.

1 dwg