I have a corrupted minecraft world?

Ok, i have a corrupted minecraft world?

Added (1). So if i deleted a chunk, is it reloaded as i found it, or with what was built, because i believe the problem is at my base. Its a modded world, so i have a lot of stuff i would rather not lose.

Added (2). Any help is appreciated.

Once you delete a chunk from the world directory, it will reload the next time you play and visit that area. So if you don't have any backups, I'm afraid your buildings are gone.