Each of the MREs at Fountain Head, Mt Bonnie and Glencoe were processed via Pseudoflow optimisation to identify the economic pit shells. Final pit shell selection utilised for guiding the pit design process was also based on evaluating upside potential for further resource expansion through exploration drilling and conducting sensitivities on gold price.
Sequential management of mining, water and tailings management for stage 1 has been modelled and is proposed to occur in the following order:
1. Rehandle, transport and processing of Mt Bonnie stockpile;
2. Open-pit mining and processing of Mt Bonnie oxide and transitional ore;
3. Open-pit mining and processing of Glencoe gold ore;
4. Mt Bonnie and Glencoe tailings to be co-disposed within the Fountain Head waste stockpile;
5. Open-pit mining and processing of Fountain Head gold ore;
6. Fountain Head tailings to be co-disposed within the Fountain Head waste stockpile and other available void space e.g., Glencoe.
Fountain Head
The existing open-pit will be cutback and extended in a northwest direction, deepening the existing pit by approximately 90m. Mining will occur by way of conventional drill and blast mining techniques using standard mining equipment including 125-200t excavators and 90-100t off-highway haul trucks.
The mining sequence at each site will consist of:
• Clearing, levelling and stockpiling of any topsoil and sub-soils for later u ........
