Funny how sieges in DF are kind of the opposite from sieges in the real world, where the goal is not to rush the gates and directly attack the people within, but to cut off their supply lines and force them to either come out and fight you or face a slow death from starvation, while knocking down their walls with siege engines.
I guess that's why my forts never look like much on the outside. Just an extremely deep moat with a bridge that leads into a small foreboding entrance. There's basically nothing to aim a catapult at, and you've got no way to know if your siege is having any effect without daring to cross that bridge.
That's how mine is currently. Except there's no usable water on the map until Spring, due to drought not freezing. However, I lost my miner and 40 dwarves and I'm down to barely scrabbling an existence.
Second question: if your miner dies, how do you get the next person you assign to being a miner to pick up the pick?
I've already found the item stack in the fortress and set it to reclaim, but everybody seems to ignore it.