METHOD FOR UNDERGROUND DEVELOPMENT OF ORE DEPOSITS IN CRYOLITHIC ZONE Russian patent published in 2009 - IPC E21C41/22 E21F15/00 

FIELD: mining.

SUBSTANCE: invention is related to the field of mining and, in particular to underground development of ore deposits in cryolithic zone. In period of ambient air negative temperatures completely dehydrated tailings are briquetted and frozen on surface, then transported and placed in stripped area of stopes. And in period of ambient air positive temperatures tailings are partially dehydrated and supplied along pipes into stripped area of these stopes, which was before filled with frozen briquettes, for filling of interbriquette space with further freezing of created two-phase fillins mass due to natural negative temperature resource of enclosing strata and added negative ambient temperature resource of briquettes frozen on surface. Completeness of tailings location in stripped area created at stage of stoped excavation is provided by specified ratio of ore production volumes in period of negative and positive temperatures of ambient air. Using geothechnology with solid excavation of ore spreading without separation into stoped blocks, completeness of interbriquette space filling with pulp from tailings is provided by detection of distance between points of unloading into stripped area of frozen briquettes and pulp pouring from flowing tailings.

EFFECT: invention makes it possible to increase ecological safety of ore deposits development due to return of solid enrichment wastes into stripped area and their recycling by means of permafrost mass restoration in stripped area.

4 cl, 2 dwg