Mining machines breaks them, with only some of their components able to be recovered. Deconstructed machines yield half the materials used to craft them, with left over fractions corresponding to a chance to recover another of that resource. Fluids are lost. For example, mining a small electric pole would yield 1 copper wire and a 50% chance to yield 1 wood.
Researching the Precision Deconstruction technology (requires utility science packs) will allow the player to mine machines normally.
Be careful when planning and upgrading your factory!
-Mining entities destroys them, yielding half the materials that went into building it.
-Material yield percentage can be configured from 0 (all materials lost) to 1 (all materials recovered).
-Entities can be excluded from this mod so that mining them returns the item as normal.