Your post is very uninformative, and won't help the game developers to fix the issue.
Where are these rocks? Co-ordinates would be nice (you can use satisfactorymap.com to load your save game when stood there, to see your player co-ords).
If you can't provide co-ordinates, a description of the location, with screenshots would be better than nothing.
Also, do the same rocks re-appear every time you load the game, or is it more random?
When making a bug report, always try to provide as much detail as you can.