I forgot my password.
Don't have an account?
Yes, actually there is natural compressive stress at 1 1/2 mile's depth, I got a really good answer from a scientist named Bob Wilson with the Newton ask a scientist website who confirmed that for me. Their affiliated with Argonne National labs.
This is now about your fourth thread on this same dopey topic.
It is now OK with you leave and never come back!
Why don't you switch to making carbon 60. You can do it in the kitchen; takes about 5 minutes to make 3 pounds of the stuff.
Much better than digging mile deep holes.