turtle.dig()
turtle.digDown()
turtle.digUp()
Yup, hence the original suggestion to use blocks (cobble, dirt, or the obvious netherrack) was made tempered with experience. I burned, so you didn't have too. Though stacks of things you can pick up again like flowers or saplings work well in other more eviromentally friendly places.Only problem with that is that lava pockets have a disturbing tendency to float right above the ore veins. :/
Wand of Equal Exchange and a stack of <insert material you don't care about here>. Swaps out the nether ore, no fuss, no mess. No lava spillage and no pissed off pigmen.
I'm on 1.1.2 and pretty sure both the silky and the auto smelt picks piss off pigmen. Perhaps later versions don't, but unless I'm mistaken, pretty sure I got jumped when I tried with both. That and I've narrowly avoided lava spills in both cases. Wand of Equal Exchange for the win. Maybe a cheesy win, but *shrug*. I prefer to think of it as creative application of cross mod utilization.
This works until you accidentally right click the netherrack and start taking out a huge 16x16x16 block of netherrack. (That is, with the maximum amount of power you can get on a wand)
You can get dumped into lava and your inventory gets filled up all the way.
You probably have flight and some form of fire resistance at this point so being dumped in lava is less exciting than it once was, but either you made a lot of wands or you put repair on it.
The aura in the nether is very fragile because there is no infused stone to recharge it and no extra pure nodes from silverwoods to help handle flux. This means the nether will rapidly become flooded with wisps and stop recharging thaumic gear.