look I'm sick of having to pave and then just carting my stuff around like crazy inside of my cave so I thought mine cars and iron rails would be a good idea.
like the palisade the rails would need a cool down but would cover a ton of area enabling building easier and cheaper. also in a cave there is almost no decay same with mine car and rails. Mine cars made of 10 bars of cast and 4 wooden wheels, (wooden wheels take 2 boards) and use your characters legs for power. Lets say you need to get to your tin mine and copper mine to get some ore, you push off once and your rolling you stop at tin mine grab you stuff push off to copper mine,stop get your stuff and start again and your done