EMPLOYEE WAS MOVING ROOF BOLTER BACK FROM FACE AREA. THE REAR OF THE MACHINE WAS GETTING VERY CLOSE TO FACE FAN AND RIB ON LEFT SIDE OF ENTRY.HE SPLIT THE TRAM LEVERS TO MOVE THE REAR OF THE BOLTER AWAY FROM THE RIB. IN DOIN SO, HE PINNED HIMSELF AGAINST THE RIB WITH THE LEFT FRONT OF THE BOLTER, INJURING HIS FOOT.