Done Quarry

Hey Achiilles.

Depending on the Quarry, it will indeed be disabled in the "Overworld", preventing it's use.

You are usually able to use a quarry such as the "Digital Miner" from Mekanism in the overworld, as it's got a limited range and possibly respects claims (Not 100% sure if it does).

On the other hand, the "Builder" from RFTools is disabled in the overworld, as it ignores claims, and has ridiculous range (512x512x256 if i recall correctly), that would allow players to easily grief eachother with it.

So you'll either have to find a quarry that is allowed in the overworld, or use other tools to expand your cave, for example the gadgets from the "Building Gadgets" mod.