lx-multi

  The Mining Cake transports players to a dedicated mining dimension — a vast, flat landscape sitting at Y=64, built
  entirely for resource gathering. The terrain is clean and simple on the surface, but underneath lies a massive cave
  network stretching all the way down to Y=-64, packed with every ore the game has to offer. Coal, iron, gold, redstone,
   diamond, lapis lazuli, emerald, and copper all generate at vanilla rates — and then some. Every ore vein has a
  boosted counterpart that generates alongside it, effectively doubling your chances of striking it rich. On top of
  that, andesite generates in massive clusters in the upper layers, and mod-added resources like zinc, lead, and uranium
   from Create Nuclear are present as well. Create's striated ore veins and Quark's extra lapis generation round out the
   experience. The dimension uses a noise-based generator with a flat surface density function, meaning you get a
  perfectly even ground to build on while preserving the full cave system beneath — including vanilla carvers and
  canyons. No aquifers means no surprise underground lakes ruining your mining session. To craft the Mining Cake, you'll
   need to set up a Mechanical Crafter with torches, a diamond pickaxe, an iron pickaxe, a diamond, coal, an iron ingot,
   and a cake at the center.