EE WAS WALKING FROM THE PROTAL BUS TO THE CM SECTION UP THE 29 WEST TRACK. HE HIT HIS HARD HAT ON A LOW ROOF BOLT BLOCK IN THE TOP PULLING HIS HEAD BACK. HE SPRAINED HIS NECK. THERE WAS NOT AN Y DAMAGE OR IMPAIRMENT TO THE MINING OPERATION. THE INJUR DID NOT INVOLVE ANY ASPECT OF COMPLIANCE, JOB SKILLS, PROFICIENCY, TRAINING, ATTITUDFE, PROTECTIVE ITEMS, OR PROTECTIVE DEVICES.