今はほりられないみたいだ
I'm guessing that you took this from this video game:
窓の杜 - 【週末ゲーム】第127回:痛快パズルアクション「ほりる」
If so, then the source of your trouble likely comes from trying to "de-conjugate" the verb "horirarenai".
It's the negative ("-nai") form of the potential ("-rareru") tacked onto the verb "horiru".
As far as I can tell (which ain't far, to be truthful), there is no such word. They've invented a verb to describe the action taken in the game.