EE WAS WALKING DOWN THE NO.3 ENTRY, OF THE C-3 LONGWALL TEARDOWN, LOOKING FOR SUPPLIES. WHILE DOING THIS HE STEPPED IN A HOLE IN THE MINE FLOOR TWISTING HIS BACK. THIS INJURY WAS NOT REPORTED UNTIL 2-13-01 EE INFORMED US THAT HE HAD STARTEDCHIROPRACTO TREATMENT FOR THIS INJURY.