Acts a "Virtual mine" as fast large 4:8:4 trains fill up 16 stations for 1:1 ore supply trains to gather and move to where needed allowing for more predictable ore flow and easy of setting up dedicated long haul ore trains.
Note this is a one way loop so all 8 engines face the same direction
Works with hexland v2: https://factorioprints.com/view/-LCXwXzaWLG_QIDsZitd