Pardon my scepticism, but it's really weird if you really are using 0.34.11 and getting this (what seems like a) bug, since 34.11 was in use for what, 2 years, and this is the first I've heard of a bug like this (granted, I've been away from the forums for months at a time, but also posting actively for months at a time).
You didn't quite read what I posted earlier:
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Undesignate a few tiles so they can no longer reach anything to mine, or disable their labors for a moment. What happens?
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Remove designations so the miners can't reach any mining jobs. Then report what happens. If they're still mining, you've somehow managed to get miners to mine without designations, in which case, congratulations, you've won/broken the game somehow.
You also haven't mentioned if you've followed than402's suggestion to disable the mining labour and see what happens....
If they don't have access to a designation/mining job, or the labor is turned off, they should look for another job, start idling, or do some "free time" activity (drink, eat, sleep, break, party). Hunting vermin should occur when dwarves become starving but can't path to food, either because they don't have access to it, or there is none.
If you're getting this in 34.11, post a save so someone can verify it. Reporting a bug may or may not be useful. If you're getting this in 40.xx (which includes 40.11 btw), then you should still post the save, and at least if it's one of the really new versions (40.1x), report the bug, but probably best to report either way. POST THE SAVE! (on
http://dffd.wimbli.com/ )