How do you use a das? If you use a dump zone, the stone queued for dumping may be destroyed. Thanks!
That's sort of the point of a das. To destroy stuff.
Now if you want to have your cake and eat it too, you have a couple of different options.
1. Define and remove garbage zones as needed to both destroy the stuff you want destroyed and quantum stockpile your stones. e.g.
Define dump zone for stones... Mark and recover stones at dump zone.
Delete dump zone for stones. Make new dump zone at das. Mark garbage to be dumped. Cycle das. Delete dump zone on das. Repeat from beginning.
or you can use a different method of implementing a quantum stockpile that doesn't use dump zones. Then you can use your dump zones on the das only and don't worry about any stone you wish to keep being smashed in oblivion. Minecarts are wonderful for this purpose. For my stone stockpile, I'll generally use the following configuration.
feeder piles. Each pile is 4x1 in size. Has 3 wheel barrows assigned. I'll use 3 or 4 feeder piles right next to a minecart.
Then I have 1 minecart.
And finally a quantum pile that the minecart dumps into.
Advantage is that since I'm using wheelbarrows, the dwarves can carry the stone at high speed to the stock pile. And I can have a nice number of active carrying tasks running at the same time. If you want to get clever, you can have several minecarts pulling from the same set of stockpiles and sort. For instance, same 3 feeder piles, except output is from two minecarts. One grabbing only magma-safe stone, the other grabbing everything else.....