Minecraft PE Mineshaft Seeds for all versions of MCPE, Minecraft Pocket Edition. Each seed has a mineshaft at or near spawn. Abandoned Mineshafts usually generate underground although they can also be found above ground in Mesa biomes. Abandoned Mineshafts can overlap and join together forming large, complex underground structures. Within the Mineshaft’s rooms, stairs and corridors you can find valuable ore, gather resources from wooden parts of the structure, collect rails or simply explore. Any Minecraft PE Seed could have an Abandoned Mineshaft underground. The trick is finding where they are.