EE WAS WORKING UNDERNEATH THE SOUTH AUMUND CONVEYOR CLEANING DEBRIS (HARDENED CEMENT CLINKER) FROM UNDER BELT. HE WAS REACHING UNDER THE CONVEYOR TO REMOVE SOME LOOSE MATERIAL WHEN A JACKHAMME R BEING OPERATED ON THE OTHER SIDE OF THE CONVEYOR STRUCK HIS HAND & FRACTURED THE END OF HIS RIGHT INDEX FINGER. EE DID NOT SEEK MEDICAL TREATMENT UNTIL 1/20/03.