METHOD FOR UNDERGROUND DEVELOPMENT OF STEEPING ORE BODIES IN DESCENTING ORDER WITH CHAMBER SYSTEM Russian patent published in 2023 - IPC E21C41/22 E21F15/00 

FIELD: mining.

SUBSTANCE: invention relates to the mining industry, namely to underground mining of mineral deposits in a descending order by chamber systems with a hardening backfill, especially when mining steeply dipping ore bodies with weakly stable host rocks. The method includes forming a carrier layer with a hardening backfill, driving mine workings, including field drifts at the level of the soil of future chambers, and boring orths along the entire length of the ore body until contact with host rocks, forming chambers of a polygonal shape with displacement of chambers of adjacent floors by half their width, with ore blasting by explosion of ascending wells drilled from boreholes in a retreating order from contact with host rocks and backfilling of the mined-out space after the chamber has been extinguished to a height of at least half of it. Polygonal-shaped chambers are formed in the middle part with volumes rectangular in vertical section with a height equal to the height of the drilling excavation of the adjacent overlying floor.

EFFECT: increasing the efficiency of deposit mining, increasing safety and reducing the time for mining and backfilling operations.

1 cl, 3 dwg