How deep can a man work underground before the pressure is too great to live?
115805
The heat would be a problem long before the air pressure.
166876
I figure the only places left are some of the more inaccesable dense rainforests of the South American continent. But the other possibility would be underground, cavers or speliologists have been trying to probe the depths of the earth by exploring underground caves and tunnels as well as flooded waterwaters to see how far they can go below the earth. That besides the oceans must be the last place where humans have never ever set foot on in this earth.
1008310
Cold Working Pressure
354455
about thirty to thirty-five feet at most even though you are diving from a high area the water will push you up plus the loss of speed upon impact doesn't help either so you might reach 30 but you might reach 20 -25 i used to jump from a 100 foot cliff and i don't remember how deep i went but it was a lot less than i though it would be
1104829
Hells yah Mang.. immortal is tight so Is underground
321379
If you had some sort of infinite oxygen supply (highly unlikely) and a air tight bunker sort of thing, it could be possible.\n\nThe outside would have to be something very non-absorbant to heat/light, yet still maintains insulation. It would probably be very expensive, and really limit your living conditions. Uncomfortable, boring, etc.\n\nThen there's always the question of food/water.
290343
The pressure on the surface is roughly 14.7 PSI. Each 10m of depth is equivalent to 1 atmosphere. Therefore, at 120m, it must withhold 12 atmospheres or 176.4 PSI.
299063
Please.  Your lungs can not be down as much as 3 feet I believe, or the air would be forced out of your lungs.  Now if you snorkel at normal depth, you can hold your breath and go down as far as you can make it.  But you can't breath continuously unless the air is being pumped.  Your head will not collapse, it's filled with liquid which doesn't compress.
477356
Not all are buried 6ft down.  6ft was used because thats about the deepest a man could dig by hand, you can only throw dirt so high.\n\nMost graves in commercially run cemeteries are anywhere from 5 to 8 ft deep deeping upon the ground and the type of burial.
311098
Not very much.  The water pressure on your body would prevent you from being able to bring in air that is at normal atmospheric pressure.  You need a compressor on the surface and a hose to breath from.
330123
i believe i heard somewhere that they can dive as deep as 1700 feet.
439690
Check out what was done on the World Trade Center buildings. They had about the same problems with water in the soil but they are a lot farther away than 1.5 meters. I'd start with a pile-driver to hit solid earth and build the entire thing above sea level. Mother Nature's Ocean will get in.
918837
In theory there is no upper bound except those imposed by real-world engineering constraints.\n\nThe Russians popped an underground event in Siberia that was a bit over 50 megatons.  It *moved* the entire  Siberian techtonic plate something like a centimeter and they decided that was probably as big as they needed to test ☺\n\nSay you detonated something in the 10 megaton range at an altitude of about 5 miles.  Pretty much everything within about a 3 mile radius of 'ground zero' is going to be, literally, vaporized.  In fact, the top 30 or 40 feet of ground zero is going to be vaporized, leaving a sort of round 'dish' shaped depression a mile or so across in the ground.  Inside this radius, the 'dish' will be coated with a 'slag' formed as melted soil and rock cools.  Depending on the minerals in the area, some of these slags are quite colerful and would make excellent souvenirs.  (Just avoid the ones that glow in the dark ☺)  Everything out to about 10 miles or so will be knocked flat and/or incinerated (total destruction on the surface) by the heat and shock wave.  The structural damage begins to fall off after that, but significant damage to structures would still occur at ranges of 20 or more miles.  People directly exposed to the event would be killed (instantly) by the radiation at distances of up to about 10 miles.  After that, survival probabilities would increase logarithmically out to about 30 to 35 miles.  Life expectency (which would be zero out to ranges up to about 10 miles)  would go up along a logarithmic curve out to a range of about 100 miles or so, at which point the mean expected lifetime (post event) would be about the same as it was before the event.  One exception would be optical effects.  Anyone looking in the general direction of the event would probably be blinded out to a range of 30 to 40 miles.\n\n\nDoug
414287
Probably could, but there is a small chance you'll get bent doing it.  Is it worth the risk?  Keep this in mind:  Helicopters, when transporting divers, cruise at a ceiling of 50'.  That is as high as they're willing to go.  \n\nChanges in altitude are very dangerous after diving and should be done cautiously.
50670
your question very good\n\nbut these times we difficult of finding relax places\npossible: (underground)
480759
The dead sea in israel is 400m below sea level have a look at that.\n\nThere are some bacteria living in crude oil reserves underground check thos out.\n\nThe other animals that live and work far underground are miners. Have a look for the world's deepest mines to see what they live through.
498399
if it's underground there is no qualifications unless working in the offices there you need qualifications.