Originally posted by vilem.krejci:

Usually it happens during the night. Try to mine during the day and at first look around if there is not the dwarf nest (spawning point of dwarves) or stone ruins (around it they are also large group). And dwarves don't like the fire - try to place some around the deposite.

Yeah thats the thing, there's nothing around me, but a few trees, no nests, ruins, nothing, the only difference between night and day is like 1 or 2 extra dwarfs in the insane mobs, could playing on an older world be messing with updates and stuff?