Computer boots normally but cannot access recovery

Currently runing OS X Mavericks on a 2011 MacBook Pro
I was unable to complete a Windows 7 bootcamp and was left with a paritioned harddrive after removing Windows 7 through disk utility. When I attempt to repartition the hardrive back to its original state also through disk utility, it comes up with the error "Partition failed with the error 'Couldn't unmount disk'".
Now I'm trying to do the partition through recovery, and whenever I try to access Recovery or Internet Recovery through Command + R and Command + Option + R respectively, my computer shuts down after the apple startup logo. The same for when I hold option during startup and manually choose the recovery option.
Using terminal, I am able to determine I have the following disks on my harddrive:
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *320.1 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                  Apple_HFS Macintosh HD            264.2 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
No CoreStorage logical volume groups found
Any idea how to get to recovery or partition my harddrive back to full capacity?
Thanks.

epw2,
log in as your administrative user and try the following command in Terminal:
diskutil verifyDisk disk0
Does that command report any errors? If so, follow it with
diskutil repairDisk disk0
After completing these commands, does trying to boot into Recovery mode still shut down after displaying the Apple logo?

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