EMPLOYEE HAD JUST FINISHED CUTTING #7 ENTRY AND WAS TRAMMING THE MINER ACROSS THE LAST OPEN XCUT TO #4 ENTRY. HE WAS STANDING BEHIND THE BACK BUMPER OF THE MINER AS HE MOVED IT. AS HE STARTED TO MOVE TOWARD THE MIDDLE OF THE MINER IT'S BACK END MOVED OVER & PINNED HIM BETWEEN THE RIB & THE TRAY ON THE MINER. THIS INCIDENT TORE SOME LIGAMENTS IN HIS CHEST AREA & BRUISED HIS BACK.