See http://www.bay12games.com/dwarves/mantisbt/view.php?id=2869

In this save, you can use 'j' to observe the large number of refuse stockpile jobs that are queued up. These appeared once the dwarves breached the caverns. The items listed, mostly corpses and body parts, are all inaccessible (I find them anywhere in the visible caverns). The jobs seem to keep coming back even after the dwarves cancel them.

This save uses the taffer graphics pack but is otherwise vanilla DF.