When I go underground, the game crashes...

When I go underground in one specific world on my kindle fire, the game immediately crashws. I did an experiment, and I found that it happened wgen I went down a ladder into the lower part of my house and when I went down the stairs to my mine, but not when I went down into my qyarry, about 2 chunks away. This makes it extremely difficult to play in that world, since I can't access any of my items, or my mine.