METHOD FOR THICK ORE DEPOSIT DEVELOPMENT

摘要

FIELD: mining, particularly underground flat ore body mining. ^ SUBSTANCE: method involves cutting development-and-face entries; forming lava undercutting and ore ledge; excavating ore in lava undercutting and ore ledge in several layers; unloading cut ore on lava undercutting surface and transporting thereof. Lava undercutting is provided with powered support sections. Ore is cut from lava undercutting in several layers having widths divisible by powered support section advance increment. Ore ledge is cut in several layers. Each layer has width not exceeding that of technically specified loader bucket entry in goaf. Cut ore is distributed and conveyed along lava undercutting length under power support section protection. Forced seating of overlaying rock from drilling-and-seating entries drilled along upper ore bed contact is carried out with pitch divisible by ore ledge layer width to be cut. ^ EFFECT: decreased cut ore losses and dilution with overlaying rock, increased safety and labor productivity. ^ 4 cl, 1 ex