ANNUAL%20REPORT%202015%20eng

Appendix I
Criteria
Commentary
• The nature, amount and representativeness of metallurgical test work
undertaken, the nature of the metallurgical domaining applied and the
corresponding metallurgical recovery factors applied.
• Any assumptions or allowances made for deleterious elements.
• The existence of any bulk sample or pilot scale test work and the degree
to which such samples are considered representative of the orebody as a
whole.
• For minerals that are defined by a specification, has the ore reserve
estimation been based on the appropriate mineralogy to meet the
specifications?
• The metallurgical process for washing the coking coal seams is already in place
and being used. It is a low cut high cut dense media processing plant at the
UHG mine site. The process is well tested and robust. Coking coal seams 0C,
3A and 4 have been mined and processed through this plant and the ash-yield
curves for these seams have been reconciled and adjusted with the laboratory
generated curves from the back analysis of results when these seams were
washed.
• The process generates primary coking coal product from a low cut point that will
produce a 10.5% (ad) ash HCC and 9.5% (ad) SSCC product, and a secondary
middlings product of 18% (ad) ash is produced from a variable high cut.
• International coal processing consultant Norwest Corporation has generated
ash-yield curves for all the coking coal seams.
• A conventional Jig washing plant is planned for processing thermal coal seams
to produce a relatively high ash low energy thermal coal product suitable for
export or domestic use.
Environmental • The status of studies of potential environmental impacts of the mining
and processing operation. Details of waste rock characterisation and the
consideration of potential sites, status of design options considered and,
where applicable, the status of approvals for process residue storage
and waste dumps should be reported.
• An Environmental Impact Statement has been prepared and all environmental
approvals obtained.
• Waste rock characterisation results do not require special placement
requirements or procedures in the dumps.
• Coal processing plant reject is stored appropriately in the waste dumps or
storage cells in accordance with the environmental approvals.
Annual Report 2015
207