I split the loot on the first few mines I did with friends on their servers. But my first solo I think I got about 4 cores a 3 sealbreaker shards. Then a few more cores on the next one, but nothing even close to the same a amount of loot that could be found in a Burial Chamber for comparison. I got the 15 I finally needed for the 3 new stations though.

Kinda wish we could find the Dverger loot crates in the Mines with the soft tissue in there too, seems a missed opportunity imo. I mean they were mining something at some point.