The Mining Process. 1. Mining open pit and underground. To define the ore from the waste rock, samples are taken and assayed. Assay results are used to mark out areas of ore and waste rock, which are mined separately. Some of the harder areas require blasting to loosen the rock prior to excavation by hydraulic diggers.
The mining process at Macraes is circular and follows a cycle of exploration, mining, processing and rehabilitation and closure. With a 30 year history of development spanning fluctuating gold prices, there are multiple examples of where an area has been explored, mined, processed and rehabilitated, only to be explored mined, processed and rehabilitated again 10 to
The gold mining operation stage represents the productive life of a mine, during which ore is extracted and processed into gold. Processing involves transforming rock and ore into a metallic alloy of substantial purity known as doré typically containing between 60 90% gold.
Yet mining the ore is just one stage in a long and complex gold mining process. Long before any gold can be extracted, significant exploration and development needs to take place, both to determine, as accurately as possible, the size of the deposit as well as how to extract and process the ore efficiently, safely and responsibly.