JakeTheBank
Return of the King
http://i578.photobucket.com/albums/ss225/OdinBorson/Thor%20Feats/Hammerbreaking.jpg
http://i578.photobucket.com/albums/ss225/OdinBorson/Thor%20Feats/Hammerbreaking2.jpg
http://i578.photobucket.com/albums/ss225/OdinBorson/Thor%20Feats/Mjolnirshattered.jpg
^ This is from Thor, volume 2, issue 80. Mjolnir is shattered after being impacted with various other Mjolnir-based hammers. It remains this way for the rest of the arc, until Thor tells Surtur to repair Mjolnir (for its symbolism, not that he truly needed it as he was empowered by the OF and Runes).
http://i578.photobucket.com/albums/ss225/OdinBorson/Thor%20Feats/Godpowers.jpg
^ Issue 82, volume 2. Here you plainly see Thor using his powers as he gripped Geirroodur, king of the trolls in a full nelson. Note he's not actively using Mjolnir, which is still damaged.
http://i578.photobucket.com/albums/ss225/OdinBorson/Thor%20Feats/Callsrain.jpg
^ Same issue, Thor summons rain from above, again without Mjolnir.
http://i578.photobucket.com/albums/ss225/OdinBorson/Thor%20Feats/GodblastwithoutMjolnir.jpg
^ Still same issue, here Thor specifically cites his godly power as his own and without Mjolnir, blasts the shit out of Durok.
http://i578.photobucket.com/albums/ss225/OdinBorson/Thor%20Feats/WithoutOdinforce.jpg
^Issue 83, volume 2, Thor pointedly states he no longer possesses the Odinpower.
So, yeah, Thor doesn't need Mjolnir to use his own powers, and he can do so all without the OF.