IE was moving #31 remote controlled bolter forward from entry 6-7 to entry 5. When the bolter went through a curtain in 6-7, the cable got caught on the bolter. As the IE went to reach for the cable to move it, EE believes they hit one of the tram buttons causing the machine to shift and pin themselves between machine bumper and the coal rib. IE was treated for a fractured pelvis.