EE REPORTED: HE AND A COWORKER WERE OPERATING A FLETCHER ROOF BOLTER DRILLING REQUIRED TEST HOLES ON THE NEW NO. 1 UNIT. HE WAS STANDING BESIDE THE MACHINE AS THE OPERATOR WAS TRAMING FORWARD. THE OPERATOR INADVERTLY SWIVELED THE MACHINE RESULTING IN THE MACHINE'S ATRS BUMPING HIS LEFT ELBOW. PAIN AND SWELLING CONTINUED. STARTED LOOSING SCHEDULED WORK DAYS ON 4-11-03 BECAME A REPOR