The principal mining method used for the underground operation at Darlot is long-hole stoping with cemented paste fill where required, with only a small proportion of stopes expected to be filled with paste. This is a proven mining method at Darlot that is associated with good productivities and reasonable costs. Ground conditions underground at Darlot are good. Mine designs have had 20% planned external dilution applied.
Selected mining method deemed appropriate based on geotechnical advice and previous experience and history at Darlot.
Assumptions have been based on actual mining performance at Darlot with Geotechnical Assessments undertaken over the years to develop a comprehensive ground support and reinforcement regime for conditions encountered at Darlot.
Stopes have been designed based on an economic cut-off.
Mining dilution of 10 to 20% has been used.
Mining recovery factor of 90 to 95% is applied.
Minimum stope widths of 1.5m for Longhole stopes.
Designed stopes with greater than 50% inferred blocks are excluded from the reported reserve.
Darlot is an operating underground mine and as such all the required infrastructure is in place and operational. Minor Capital Development will be required to extract all of the ore reserve.
Great Western open pit
At the end of FY-22, the Great Western open pit had progressed to within two benches of its final design depth and ........
