I have no idea what electronic dance music has to do with it though
>the pressure
dude thinks that you only have dig 1km into the ground to reach China
440m underground is deep enough that you're well under the cold temperatures immediately underground, but not so deep it's painfully hot. It's probably a super stable temperature year round, and you could probably spend all day every day at 440m and the worst you'd have is it's pretty stuffy being surrounded by rock. Ventilation is key in something like that, because it'd be humid and without getting fresh air it gets stale and eventually could get quite dangerous as well.
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nah, at 440M deep below a mountain it is probably approaching 0ยฐc (about 32ยฐF), cuz remember 440M below a mountain is not the same as 440M below sea level, and even IF the bunker was 440M below sea level it would still be cold as the geothermal heat gradient only begins to kick temperatures UP after 1 KM in depth, and it ain't even fast near the surface, you need more than 2 KM below the surface to see anything close to 30ยฐc (86ยฐF).
the EDM when it comes to soil may be for Electrical Density Measure, which is a way to measure soil density from electrical impedance, tho idunno where he gets that measure what is sure is that the average natural granite is harder than concrete, on average 1 to 4 Mohs harder, so you can use granite to scratch concrete, dunno how they compare in rebound harness tho
I also have no idea what EDM is supposed to stand for other than music. Best a search gave me was for surveying, Electronic Distance Measurement, but nothing to do with concrete or rocks...
journey to the center of the earth levels of depth xD
the all mighty bunker buster couldn't even put a scratch on the average coal mine which comfortably sit between 600 meters to 1 kilometer below ground...
mind you that the jewish lion that is the israel-usa coalition spent all time smelling it's own farts while lockheed-martin and raytheon got blank checks to just do whatever.
just like the taliban. I bet they dug it with spoons too. FOH with this nonsense. ๐คฃ
From what I've heard, we can't invade because it's a giant open desert to get to anything important, and there's no logistics trail. Any supply/casualty staging area will get blown up by missiles immediately.
best example is the AI guided smart bombs which have managed to hit targets that no human ever could, a human observer would have required pesky things like shadows and lights reflecting on the 3d surface of the "plane" to recognize the target as real, the AI targeting system is much less picky, all it needs is a roughly plane shaped silhouette and it will proceed to deposit a 4 million dollar bomb right on the center of the paint.
They didn't dig 440m down and then created their underground city near the magma layer or something like that.