So, I got my first cave in today. I didn't have a mine support ready to build, but I was also pretty curious to see what it would do, so I wouldn't have built one anyway.
This is going to be a whiny rant, but here it is. Why is there a need to add so many layers of grinding to this goddamn game? So you dig out your mine a little bit, wait for dry boards, build mine supports. Don't use up all your dry boards though, because if you see a cave-in, DO EVERYTHING in your power to stop it. No dry boards = don't even think about mining.
Back to my story, I moved out everything in a five by five area around the dust - figured that it would be enough room for the few rocks to fall down. Went afk then came back to utter disaster. One quarter of my mine is now filled up with random blocks of mineable tiles. In a 20x20 mine, 38 'new' cave in tiles appeared on top of the storage area I had set up. I can't get to my chests, I can barely walk in my mine since I moved things to the sides 'temporarily', and it's so haphazard I don't even know where to begin.
I'm a hermit, and my time in this game needs to spent tending fields, collecting fertilizer, tending the turkeys, and all the other major functions needed to run 'the farm.' So now, my entire storage area is covered in new tiles, I can't get to my stored food, or retrieve the stored cereal to feed the bins and the turkeys. If I want to get back to SQUARE ONE where I started this morning, I'm looking at 30mins to light fires, then another 20-30 to mine out the tiles. Also, I like to chip my boulders down immediately to keep the clutter under control. NOT POSSIBLE with the boulders that come out of the mineable tiles. I didn't do an accurate count, but I KNOW they have more then the 45 stone you can chip from normal stone boulders.
My problem is not with the cave in mechanic, its the way it is implemented. It penalizes the player, especially the hermit, for a simple mistake (or morbid curiosity in my case). 4-5 tiles would have been more then enough - but 38?!?!?!? Seriously, 5 tiles would've been more in line with Haven's cave in mechanic. I guess since you have "5-10" minutes to build a support, they want to ensure that you won't do it again by punishing us with useless clutter. I would much rather have it fall on my head, take some percentile blood damage, and risk being trapped in an 'instant' cave-in that DID not place THIRTY ***** EIGHT mineable tiles across 20% of my mine.
/rant off