I would like to create a new mining dimension for my Forge server. Perhaps resetting the dimension weekly or monthly. I understand that if I delete the \dimensions\mining_dimension folder the dimension will be recreated, but I would like to be able use a new seed each time.

I have tried using the example default data pack which has the following, but changing the seed does not seem to change the generation.
{ "generator": { "type": "minecraft:noise", "biome_source": { "type": "minecraft:fixed", "biome": "mining_dimension:mining" }, "seed": 0, "settings": "mining_dimension:mining" }, "type": "mining_dimension:mining" }

I don't think this is possible, since it always uses the general world seed.