'smacks palm to head loudly'let's start.clearly...

'smacks palm to head loudly'
let's start.
clearly aimed at the lower denominator investor from how it is 'worded'

what the heck is 100% captive renewables powered? sure isn't solar as you'd need a huge farm and massive battery to turn a mill.

it cost ~$6/t to crush and sort ore, you then need to put all the waste somewhere...not underground, which is why 99% of ore sorters are on surface..the 1% have underground crushers running as you need to pre crush to sort.

keyhole mining is called narrow vein mining which is done in most places around the world using single boom jumbos and small bloggers can get you down to 3m drives and 1.5m stope widths minimum.

putting in 2 declines doesn't save ventilation..you now need to provide air to 2 locations.
there is no cost saving for doing smaller declines as you are adding costs back in by putting in additional decline.

if you add a conveyor system you need to put in oversize declines and access not smaller as you also need to drive trucks and vehicles down it as the conveyor sits next to vent bag in the backs, or alternatively if you have independent conveyor only drives then you need to double the infrastructure to allow trucks, bogger and car access.