Yes others to have all been wondering why only 1.25mtpa , maybe as they prove up more resource they can justify the added expense in making the plant alterations for a larger throughput ?
Part of the reduced throughput could have been that the UG ore takes more power to grind and needs to be ground smaller which reduces through put compared to the softer ore in the pit.
I think ideally they would like to grind the ore finer with one big ball mill, but maybe they can use the current SAG mill or what ever it is and feed the oversize to a small new ball mill for further grinding ?
But guessing you are probably right the main reason for the lower throughput would be bottle necks underground .
Yes second portal would make a difference , however the portal they have goes to a T intersection not far in that would have opposing declines that could eventually take ore from different ore bodies that may reduce cluster flucks , plus the right decline at the T has a return decline parallel to it which would also reduce any bottlenecks .
(What does neck development mean ?)
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