MINING METHOD OF THICK STEEP ORE BODIES Russian patent published in 2013 - IPC E21C41/22 E21F15/00 

FIELD: mining.

SUBSTANCE: method includes digging of workings for dividing of ore body in blocks, stage extraction of ore by chambers. After dividing of ore body into panels, blocks and chambers, development of chambers is done in staggered order as to ore body rise by the scheme I-_III-II-_IV as shown in dwg. 1-5. At that bottoms of adjacent chambers I (II) and III (IV) are displaced by one sub-level. Broken ore is transported from the chamber to bottom gangway along delivery crosscut drifted in the middle part of adjacent chamber which is used as drilling crosscut during its development. Development of ore of upper part of chambers is performed between artificial pillars from consolidating stowing mass, and of lower chamber - in ore rock. Coefficient of form K_f=b_u/h_p size of ore pillar corresponds to the following condition: 0.5<b_u/h_p<1, where: b_u - width of ore pillar and width of undeveloped chamber, m; h_p - height of ore pillar or half height of undeveloped chamber, m.

EFFECT: invention allows reducing overburden pressure on the elements of development system, reducing losses and ore impoverishment.

3 cl, 6 dwg