Ways to improve methods of mining valuable ore pillars

Abstract

The Kaula copper‑nickel deposit was developed in the upper part by open pit and in the lower part by underground mining with priority extraction of chamber reserves. Recently, a transition has been made to the second stage of development – extraction of the remaining ore pillars. The deposit is represented by a stratiform body with variable thickness and dip angle; the depth of occurrence is up to 400 m (vertically). The strength of the ore is characterized by a coefficient of 8‑12, and of the host rocks – 8‑14 according to M. M. Protodyakonov.

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