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, the second stage of development - excavation of the remaining ore pillars - has been switched to. The deposit is represented by a stratum-shaped deposit with variable thickness and dip angle; the depth of occurrence is up to 400 meters (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.