METHOD TO MINE LARGE SLOPING ORE BODIES Russian patent published in 2012 - IPC E21C41/22 

FIELD: mining.

SUBSTANCE: method includes tunnelling of development and face-entry mines, arrangement of stope drifts along ore body soil, formation of a free process space along the front of stoped excavation, tunnelling of drifts in each even layer of the ore, its excavation in strips, upward cutting by layers in the strip, hole drilling and breaking of another layers of ore from the specified space after breaking, discharge of broken ore and backfilling of developed space with a hardening mix. Drifts in each even layer of ore pass as advance layer slopes transversely to stretching front of stoped excavation. Side loading drives are additionally arranged on soil of ore body. The free process space is formed along the entire width of the strip. Another layers of ore are drilled from previously prepared surface of shrinked ore material (SOM). Restoration of the specified space contour after breaking of another layer is carried out by partial loading and planning of broken ore by mobile equipment with driving via mentioned slopes. Massive discharge of the entire volume of shrinked ore material is carried out after breaking of the last layer of ore via side loading drives and a stope drift of the adjacent strip. Backfilling of the mined space is carried out after its isolation with links in one stage with a full-strength hardening mix for the total height of broken ore layers.

EFFECT: improved efficiency of production due to simplified technology, reduced number of stages in works performance and lower costs for filling of the mined space by reduction of consumption of high-grade filling and reduced duration of preparation and finalisation operations.

2 cl, 7 dwg