AMD

Read more... about The Practicalities And Implementation Of A NAF Grade Control Programme For Placement Of A WRD Cover

Read more... about Development of a NAF/PAF Grade Control Programme for Placement of a WRD Cover

Closure options under consideration at some iron ore mine sites in Western Australia include backfilling with mineralised and/or non-mineralised waste rock. Post-closure, following groundwater rebound, flow-through conditions may develop in the backfill located within the saturated zone below Read more... about Weathered Sulfidic Waste – Laboratory-Scale Tests for Assessing Water Quality in Backfilled Pits

The number and distribution of waste rock samples geochemically characterised before and during mine operation impacts the ability to accurately represent the waste characteristics and to predict the potential for acid and metalliferous drainage (AMD). Numerous regulatory and industry bodies Read more... about The Influence of Sample Numbers and Distribution on the Assessment of AMD Potential

The Century open cut zinc mine at Lawn Hill recently changed ownership from MMG Limited (MMG) to New Century Resources (NCR). Closure planning for the site was initiated by Zinifex, developed further by MMG, and is continuing under the new ownership. The waste rock dumps will be covered with a Read more... about Pit Lake Water Quality Modelling at Century Mine

Various Australian and international regulatory bodies (Environmental Protection Authority, 2015) require an early assessment of the geochemistry of waste rock. This usually includes estimates of the locations and volumes of potentially acid-forming (PAF) materials and requires sampling of the Read more... about Geostatistics and Sample Numbers from an Acid and Metalliferous Drainage Perspective

Using drillhole assay data to assess the risk of acid and metalliferous drainage (AMD) early in the planning of a mining operation can have a number of benefits.  These include:

• Early identification of operational and closure AMD risks;
• Optimisation of geochemical