Posted by cradcore
As a lot of us probably have...hopefully only once though. Waking up with sore lungs tends to be a pretty good hint to wear a respirator next time!
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Unless you were blowing globs of mud out your nose I wouldn't worry about asbestos being the cause. Very unlikely you ate that much of it unless you kicked up a dust storm down there.
Never stir up dust if you can avoid it.
Mold is probably rampant down there and some strains are quite nasty. The airborne spores are invisible. A burning in the back of your throat is a sign you're sucking them in... it happens within minutes or less of exposure.
Benzene if present is nasty stuff to be exposed to, especially repeatedly. Even than, doubtful it will cause problems in this case. The coolness keeps concentrations relatively low unless there are huge amounts present which is unlikely.
Be observant and use common sense whenever you explore... falls are your #1 hazard. At a site like that it's all too easy to find a hellhole. Respirators are a distraction... and distractions kill.
You successfully avoided the primary hazards