A contractor was operating a shuttle car on the unit 2 section. In the process of operating the s/c EE hit a ledge in the mine floor causing EE to strike the canopy of the s/c with EE's hard hat. EE filled an incident report but did not say EE was going to the doctor which refereed EE to a specialist. EE rtw on 4/20/2017 notifying the mine sight EE was off due to a strained neck.