Time for another tunnel.
I joined totse because of the tunnel thread, and that summer I joined I dug a 5 foot diameter, 6 foot deep hole through solid rock with a hammer, a shovel and a system of pulleys to get the rock out.
Now I'll actually have some help, a few of my friend suggested the idea to me that we need an underground room for stoner activities and other crazy shit.
We started tonight for about half an hour, and less then a few inches into the ground we hit rocks and lots of brown clay, so it should be fairly stable to tunnel through. Eventually we hope to have at least one underground room, as far down as we can dig.
I'm looking up the old tunnel threads on zoklet now, they have links to some good websites and books.
A good rule of thumb to avoid collapse is to ensure there is a thickness of earth on top (i.e. between the surface and the tunnel roof) that is twice the height of the tunnel you intend to dig.
Stuff like that.
I'm not planning on burying any shipping containers or anything. Just deep, and in such a way that minimal reinforcement is needed. The poor teenager way.
Thoughts, or resources I can read up on that would help me with this project?
Pictures tomorrow if I can find batteries.