Hello Johnycomelately I am sorry mate I was there 30 odd years ago I do not know the regulations now required . All I can say is they will need more than one heading to produce the required amount of tons . At least 3 drive headings in ore and a stope producing ore . Then you need to get the dirt out of the mine . They need to put the rails back in . Miners that can produced these tons are on roughly $1000 a shift in Australia . With all the other costs involved You can see it is a very expensive exercise. Good luck
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