The Correnso mine is in the final stages of production with production expected to be completed in the second quarter of 2022.
There are multiple orebodies within the underground mine including Correnso, Daybreak, Empire, Trio, and Louis. All mining areas share the same stoping method and have very similar modifying factors and assumptions and design criteria applied.
Correnso is accessed via the existing Favona Mine and Trio Mine, the portal is close to the Process Plant.
Mining options available for Correnso are limited because of the consent conditions which include blasting and backfill constraints. Modified Avoca long hole bench mining with waste rock backfill was selected as the preferred mining method for extraction of Correnso.
Small areas of the Louis orebody use an overhand cut and fill method due to the narrow, shallow dipping nature of the orebody.
Access to underground workings is via a decline from previously mined areas, which also serves as a fresh air intake. The primary ventilation is exhausted through a raise bored shaft to surface and a return air drive breakthrough into the Martha pit. An escapeway rise that has been raise bored to surface and equipped also serves as a fresh air intake. The portal is located close to the processing plant.
In general mining areas are designed with either a 15 m or 18 m level spacing, floor to floor. This is primarily to limit blast vibration, but this also a ........
