Get Kyle and kill the Cultists. Go back to the locked door you saw earlier. He'll open it.
(Cutscene) You will need to turn on the pumps, to do so, use Push on the red pumps.
After that and a cutscene, follow Kyle into the hole that you made.
Jump into the air stream and you'll fall into a doorway.
You've got to use force Speed to get in between the green beam.
Kill the baddies, then use this to get to the next floor.