Cave-ins are not possible. Neither is breaking the path to every room--by adventurers or by the core.

—Source: https://forums.spacebattles.com/threads/i-woke-up-as-a-dungeon-now-what-dungeon-worm.620521/page-15#post-44875999
—Archive: https://web.archive.org/web/20220626224007/https://forums.spacebattles.com/threads/i-woke-up-as-a-dungeon-now-what-dungeon-worm.620521/page-15#post-44875999