As far as I am aware it’s choked. I think you can get out under it further down after the big ladder.
You can get into the stope under the boulder (I think someone did on Thursday), but I've not really done much more than poke my head out under it. I don't know if it continues down, is choked, or it just runs blind.
Searching for the ever elusive Underground Titty Bar.
DDDWH CC