just look at it ...

it is 2 tiles away from a huge cavern and i can't manage to remove these
the wiki says :
Messages that occur while mining (each message means 10-15 more Mining ability to mine):
* You dont even manage to scratch that rock.
* That rock is very too much hard for you to mine.
* That rock is too much hard for you to mine.
* That rock is slightly too much hard for you to mine.
* That rock is little too hard for you to mine.
i get the first message which tells me "you don't even manage to scratch that rock"
at the moment i have 25 STR and a q10 stoneaxe (the best i can get) does that mean i have to acquire roughly 60 more STR?
wouldn't it be better to build another minehole right next to it?