EMPLOYEE WAS HELPING INSTALL A CONVEYER CHAIN ON A MINER. EE WAS BRACING AGAINST THE CHAIN WITH A SLEDGE HAMMER WHEN THE CHAIN SLIPPED OFF THE HAMMER STRIKING HIM ON THE RIGHT RING FINGER. HE SUSTAINED A FRACTURE TO THE FIRST JOINT OF HIS FINGER. THE BONE WAS SET AND A METAL SPLINT WAS APPLIED.