EE WAS TRYING TO LOWER A CONVEYOR BELT BY CUTTING THE SUPPORT BEAM OFF, SUPPORTING THIS BEAM WITH A PROP & THEN REMOVING THE PROP TO ALLOW THE SUPPORT BEAM TO FALL 6' TO THE GROUND. AS HE WAS REMOVING THE PROP, THE BEAM & PROP BOTH FELL TO THE GROUND & ONE OF THEM STRUCK HIM IN THE LEFT HIP AREA.