This probably sounds stupid but if you know for a fact that the mining world is going to reset at near the beginning of every month just make sure you don't log out when you're actually still in the mining world, therefore you won't need to worry about logging back in and finding out the world has reset thus resulting in you losing your stuff if you suffocate. I highly doubt there is anything the staff can do to prevent this, they give you a good enough warning before the world resets.

if this should happen there are somethings you can do.

     First, don't focus on trying to escape, instead focus on typing /wild chunks home, as this will save from suffocation.
     Second, you can activate your superbreaker skill and dig up.  If you act immediately you can break almost any block fast enough, even without a pick.
     Third, you think you will not make it, hit f3 and take down your location (XYZ). in this situation the you make loose your levels but most likely can Regen your items but going back to that location.
    Fourth, usually if you check the website before you log in, you can get a heads up if the mining world reset already.

These solutions are not full proof but they certainly can help.

Last time I died from this it happened instantly and I couldnt do anything about it
Also where do you find out about mining world reset

So far they've never gave an exact date for the mining world reset but as I've already said it's around the beginning of every month, which is a good enough warning for everyone to know that the mining world (and Nether etc.) will be resetting. After the mining world has reset they normally put up a notice on the website.

not needed to know an exact date, which it varies from month to month. As stated above, just make sure you tp out of the mining world before logging out. Only way that seems to be able to work.