Items from successful mining have random QL, but the maximum possible is the lower of your mining skill and the tile's inherent quality. See [[prospecting]] for details about tile QL.
== Other considerations ==
You can either mine "up", "down" or level when mining a tile. Only the last mining action is relevant to determine the direction the mine shaft will take.
Mining up or down represents the equivalent of a 20 dirt slope.
There are slight deviation in slope (up to 1 "dirt") when a mine shaft progresses. so "level" is actually 0 slope, 1 or -1.
Note that when connecting two mine shafts, the direction of the mining is irrelevant. one floor will connect to the other floor and ceilings will likewise connect.
== Warning messages ==
[[Image:Sideshaft.png|frame|right|Side shaft example]]
; The iron pickaxe gets stuck in the rock. : This one is a basic anti-macro measure. Move around a bit and you will free your pickaxe. Until then you will be unable to perform further mining actions.
; You have to move to free your pickaxe. It is stuck. : This means you didn't move around enough after getting the preceding message.
; You fail to produce anything here. The rock is stone hard. : Occurs on the surface. This means the tile you are attempting to excavate is actually an ore vein. There's nothing to do about it, you simply have to make your entrance on another tile. Note that if you make the entrance one tile below the vein, the tunnel will open right into the vein and cannot be extended until the vein is depleted.
; The ground sounds strangely hollow and brittle. You have to abandon the mining operation. : Occurs on the surface. This means there's already a tunnel on the tile you're trying to excavate. There's nothing to do about it, you simply have to make your entrance on another tile. Or you could search for the entrance (possibly caved in) to the existing tunnel.