CSA Mine Cobar – Copper Ore Bin Remediation

The underground copper mine originally commenced production in 1871 and has seen production of zinc, silver, lead and copper, however today it focuses on mining copper. The mine operates 24 hours per day, 7 days per week. In 1963, four reinforced concrete ore storage bins were constructed. These bins are integral to the production operation in handling ore between the underground mine and the mill. With a service life in excess of 50 years, the bins have experienced structural deterioration and concrete spalling. This spalling to the bins’ exterior and support structure remained a safety issue for personnel working around and under the storage bins so remediation works were considered necessary to extend the life of the existing bins for a further five years.

Freyssinet Australia was commissioned to conduct an investigation of the four ore bins to map the drummy and delaminated concrete zones around the bin perimeter and support structure and were subsequently awarded the contract for the repair works.