I’m not really sure how this is supposed to work. Where would all the material from that sphere go? I suppose if you used a nuke then you could vaporize it, but then I don’t think you’d want to live there.
Blast a Home in the Moon?
THE latest in a series of proposals for your lunar living facilitiesâ€”in case you decide to make the tripâ€”suggests construction could begin even before you land. A projectile from Earth would carry special shaped charges to blast a shaft (Fig. 2A) in the Moon’s surface. At a predetermined depth it would blow a spherical chamber (2B).