I was thinking that the miner can use up way more than the 64 pipes we can give it into it's slot and thought maybe it could pull additional pipes from it's chest while mining so it can keep going until it hits the end without interaction.
But then I thought about filling the hole, how would it know what to use to keep filling if it's stack should run low?
So seeing that the induction furnace has 2 slots I thought the miner could get 2 too, that way we could give it 2 stacks of pipes if it should mine or 2 stacks of cobble to fill the hole when it's done.