Mavericks crash won't let me access my computer

I upgraded to Mavericks about a week ago and nothing was wrong with it.  Then today, I go to log back into my Mac Book Pro and am unable to log in because my computer just continues to shut off.  So I booted up in safe mode and am under the Disk Utilities.  Unfortunatly, I do not have a recent backup for my files and my HD is locked, so when I try to copy a new disk image over to an external hard drive I keep getting an (input/output error).  Is there any way for me to back up any of my files while in Disk Utilities?  Or is there some other way for me to backup any of my data any way else?
Another note:  Every time I try to Verify Disk I get a "The volume Macintosh HD could not be verified completly"  followed by an error:  "Disk Utility can't repair this disk...  disk, and restore your backed-up files."

Are you in Safe Mode or Recovery?
Safe Mode doesn't limit you to Disk Utility, it just disables third-party startup items. You should be able to use the Finder.
In Recovery, you can reinstall, use disk utility, or recover from a Time Machine backup.
You can use Disk Utility to make a backup image in the Restore tab. However, if you're having IO errors, it likely won't image correctly. Here's some info on that. http://pondini.org/OSX/DU7.html
The Source will be your internal drive and the destination will be your backup drive. The destination must be at least as large as the Source, and the destination will be completely erased.
Waiting until after disk failure to backup usually doesn't work out very well.

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