EE WAS LOADING SUPPLIES FROM THE SCOOP TO THE R-BOLTER. HE BENT OVER TO PICK UP A BUNDLE OF 5 OR 6 6' ROOF BOLTS. AS HE STOOD UP HE FELT PAIN IN HIS LOWER BACK. HE FINISHED LOADING THE SUPPLIE S. HE THEN WENT TO EAT LUNCH. HE DID N'T FEEL BETTER SO HE WENT OUTSIDE AND THEN TO THE HOSPITAL.