I have had similar crashes, see my other thread for links to lots and save games that will trigger them. I restarted on a map with water only in starting area to minimize it but still had some when mining near the water.
From my observations the drones are trying to get to an ore square that is bordering on the water and get stuck on little jagged water bits. I suspect they are trying to stand on the water to mine that square. Adding landfill seems to fix the issue.
The crashes I was having don't happen right away so if you see the miners getting stuck you can remote them from the depot and they respawn in time without crashes. I hat gives you time to landfill or manually mine the spot in question.