1. Gold
... surface and generally requires grades of at least four grams per tonne to be viable. Many open cut mines progress to underground techniques if the gold grade is sufficient and continuous lodes or ore-shoots are found. Both underground and open cut projects require waste to be removed, ore to ... be blasted, loaded into trucks and taken to the crusher for the first stage in separating the gold from the waste material. After production ceases, underground mines and open cut pits are secured against intrusion by people and animals. Processing areas and other ... surface and generally requir...
- Word Count: 1243
- Approx Pages: 5