Waste segregation in mining operations is the deliberate physical separation of different categories of waste materials at the point of generation or during handling to ensure that each type is managed in the most appropriate, safe, and cost-effective manner. Proper waste segregation prevents the mixing of incompatible wastes — such as acid-generating and non-acid-generating rock — which could exacerbate environmental impacts or increase disposal costs. In bauxite mining, waste segregation involves separating high-clay reject material from sandy tailings, and keeping potentially reactive overburden separate from inert topsoil used for rehabilitation. Gold mine waste segregation distinguishes between potentially acid-forming (PAF) waste rock, non-acid-forming (NAF) waste rock, and cyanide-bearing tailings, each of which requires a different storage and management approach. Iron ore waste segregation separates fine slimes tailings from coarser rejects and ensures that sulphide-bearing country rock is not co-disposed with inert waste. Diamond mine waste segregation addresses the separation of kimberlite tailings from coarser mine waste rock and ensures that security-sensitive material — such as concentrate streams — is handled in controlled areas. Effective waste segregation is underpinned by robust characterisation data, clear operational procedures, trained personnel, and physical infrastructure such as designated waste classification stockpiles and collection points.
