EMPLOYEE WAS CHANGING OUT METAL BLADES ON A BELT SCRAPER AT THE 26W BELT DRIVE TRANSFER. THE SCREWDRIVER HE WAS USING TO PRY LOOSE THE METAL BLADES SLIPPED AND HE LACERATED HIS THUMB ON THE M ETAL BLADES. HE WAS NOT WEARING GLOVES AS TRAINED TO DO. THERE WAS NO IMPAIRMENT TO MINING OPERATION OR DAMAGE TO EQUIPMENT. INJURY DIDN'T INVOLVE COMPLIANCE, JOB SKILLS, PROFICIENCY, ETC.