yes good comparison with M1 @Joelstar .
Great fingal also looks similar , although NN is better lithologically , I feel as it is both subvertical in strike and dip compared with being near vertical .
Beng subvertical would I feel be safer to mine as the back fill does not need to be a secondary supporting structure yet the ore will still fall into the drive and you will only get a small amount of overbreak in the hanging wall of the lower drive when vertical long hole stoping .
Dilution is still minimal as the ore contacts between the country rock is so wide , you can literally drive a truck through (in this case a TBJ and LHD's ) .
That is how I see it as a layman , be good to have an actual mining engineer's opinion .
Take over premium ?, page-205
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