Actually, off-world TBMs creating a partially hollowed out moon would
be really nifty, although there could already be a porous or geode
like hollow interior as is. TBMs could seek out such porous layers
and geode pockets, because within that moon that’s surrounded by such
a hard vacuum, and via sublimation or the vaporizing of elements (such
as the loss of sodium or the evaporation of mineral brines) is where
almost anything simple or complex is possible about the innards of our
moon.
Removing only 0.1% of the moon is worth 2.2e16 m3 which offers 1e7 m3
for each of 2.2 billion of us, or 1e6 m3 for each of 22 billion of
us. How is that a bad thing?
Hollowing out .001% of Earth is worth 1e16 m3 = 1e6 m3 for each of ten
billion of us.
A thousand really big and powerful TBMs working around the clock could
make this happen. That's based upon a conservative 1e7 m3 per TBM/yr,
so a thousand of those TBMs will only manage to dig through 1e10 m3/
year. As you might figure, this is a very big and energy consuming
dig, although a million years worth of plutonium reactor powered TBMs
would be a darn good utilization of our spent nuclear reactor fuel
(especially of spent MOX that has 7.5% plutonium). Of course I’m
being extremely optimistic about humanity lasting another million
years, especially when this current century keeps looking doubtful.
With such tunnels established, all sorts of vacuum tunnel public-
transporters running on frictionless magnetic drives could become the
only way to fly (so to speak). Currently 3 inches or 7.5 cm/minute is
the fastest hard-rock TBM, however with talent and resources applied
should be capable of doubling that, but of course finishing off the
interior for habitat use will take a bit longer. A Caterpillar TBM as
of 2005 did manage to reach 410 meters/month.
"The Herrenknecht S-373 Double Shield is optimally suited for this
kind of geological conditions. Since the start of excavation in July
2007, the machine has achieved world records in hard rock with a best
daily advance rate of 83.2 meters and a best weekly advance rate of
430.4 meters.”
As some of us can plainly see, the advancements in TBM performance
haven’t quite run out of steam or hit the wall, at least not so far.
Perhaps eventually exceeding a km/week isn’t even asking too much, and
that’s worth excavating 1e6 m3/month/TBM, or 1.2e7 m3/year/TBM.
http://www.phdtbm.com/page18/page12/page9/
http://www.herrenknecht.com/news/press-section/records-tumble-at-the-cabrera-tunnel.html
http://www.cattunnelboring.com/MS/MS1/page.php?p=29
Once the hollowing out of our moon gets underway, there should be all
sorts of ideas and notions of off-world exploitations going
mainstream.
Not that there’s any significant shortages or commercial market for
raw sodium that’ll need off-world sourcing, but it’s simply and
indication as to what certain asteroids should have to offer. If an
asteroid has indicators such as sodium and helium, is a really darn
good indication that other extremely valuable elements should exist.
Obviously our naked moon is quite highly charged (similar or somewhat
greater extent than charged particles within our Van Allen belts),
because it’s certainly not from its wussy gravity or any significant
geomagnetic field that’s holding into that surrounding cloud of
ionized sodium. I’m not at all certain why our moon should even have
its own internal cache of sodium, but none the less it has established
and manages to replenish a 900,000 km trail of it, plus hosting a 9r
surrounding cloud that together represent a considerable mass of
sodium.
http://en.wikipedia.org/wiki/Sodium
“The free metal does not occur in nature, but instead must be
prepared from its compounds”
http://www.britannica.com/EBchecked/topic/622563/Van-Allen-radiation-belt
“The inner Van Allen belt consists largely of highly energetic
protons, with energy exceeding 30,000,000 electron volts. The peak
intensity of these protons is approximately 20,000 particles per
second crossing a spherical area of one square cm in all directions.”
Of course as a consequence our naked moon gives off a terrific amount
of gamma, as mostly created by other cosmic gamma interacting with its
metallicity and paramagnetic nature, plus there should be a little of
its own local cache of cobalt 60, as well as plutonium and most other
radioisotope fission worthy elements. Our moon is clearly a primary
and/or secondary/recoil source of gamma.
http://apod.nasa.gov/apod/ap060527.html
http://en.wikipedia.org/wiki/File:Moon_gamma_rays_egret_instrument_cgro.jpg
Naturally the mainstream status quo of DARPA, JPL, ASU and NASA as
oligarch minions are all keeping this knowledge as mum as they can
about any of this metallicity, because it means that our naked moon is
charged at something greater than 20 MeV.
Here we have another stymied generation of K12+ students working with
those supposed Apollo moon rocks, except they’re checking out as
though their titanium plus other combinations of elements as having
come only from Earth.
“Titanium paternity test fingers Earth as moon's sole parent”
http://www.moontoday.net/news/viewpr.html?pid=36571
"We thought that the moon had two parents, but when we look at the
composition of the moon, it looks like it has only one parent," Zhang
said.
“Zhang's titanium analyses greatly reinforce previous work by other
researchers who came to the same conclusion after comparing
terrestrial and lunar oxygen isotopes, which are less refractory and
thus more likely to gasify during a giant impact than titanium.”
"We thought we knew what the moon was made of and how it formed, but
even 40 years after Apollo, there is still a lot of science to do with
those samples that are in curatorial facilities at NASA," Dauphas
said.
I’ve said the exact same thing since I discovered how totally
disinterested our NASA, DARPA and JPL were about our moon, its L1 and
especially obfuscating as to the planet Venus (aka Guth Venus).
http://groups.google.com/groups/search
http://translate.google.com/#
Brad Guth, Brad_Guth, Brad.Guth, BradGuth, BG / “Guth Usenet”
On Apr 24, 5:10 am, RichA <
rander3...@gmail.com> wrote:
> See what being a raving environmentalist does to your brain?
>
> BBC:
>
> 24 April 2012 Last updated at 07:30 ET
> Plans for asteroid mining emerge
>
> Details have been emerging of the plan by billionaire entrepreneurs to
> mine asteroids for their resources.
>
> The multi-million-dollar plan would use robotic spacecraft to squeeze
> chemical components of fuel and minerals such as platinum and gold out
> of the rocks.
>
> The founders include film director and explorer James Cameron as well
> as Google's chief executive Larry Page and its executive chairman Eric
> Schmidt.
>
> They even aim to create a fuel depot in space by 2020.
>
> However, several scientists have responded with scepticism, calling
> the plan daring, difficult and highly expensive.
>
> They struggle to see how it could be cost-effective, even with
> platinum and gold worth nearly £35 per gram ($1,600 an ounce). An
> upcoming Nasa mission to return just 60g (two ounces) of material from
> an asteroid to Earth will cost about $1bn.
>
> The inaugural step, to be achieved in the next 18 to 24 months, would
> be launching the first in a series of private telescopes that would
> search for asteroid targets rich in resources. The intention will be
> to open deep-space exploration to private industry.
>
> Within five to 10 years, however, the company expects to progress from
> selling observation platforms in orbit around Earth to prospecting
> services. It plans to tap some of the thousands of asteroids that pass
> relatively close to Earth and extract their raw materials.
>
> The company, known as Planetary Resources, is also backed by space
> tourism pioneer Eric Anderson, X-Prize founder Peter Diamandis, former
> US presidential candidate Ross Perot and veteran Nasa astronaut Tom
> Jones.
>
> The founders of the venture are to give further details in a press
> conference on Tuesday.
> Long game
>
> "We have a long view. We're not expecting this company to be an
> overnight financial home run. This is going to take time," Eric
> Anderson told the Reuters news agency.
>
> The billionaires are hoping that the real financial returns, which are
> decades away, will come from mining asteroids for platinum group
> metals and rare minerals.
>
> "If you look back historically at what has caused humanity to make its
> largest investments in exploration and in transportation, it has been
> going after resources, whether it's the Europeans going after the
> spice routes or the American settlers looking toward the west for
> gold, oil, timber or land," Mr Diamandis explained.
>
> Water from asteroids could be broken down in space to liquid oxygen
> and liquid hydrogen for rocket fuel. Water is very expensive to get
> off the ground so the plan is to take it from an asteroid to a spot in
> space where it can be converted into fuel.
>
> From there, it could be shipped to Earth orbit for refueling
> commercial satellites or spacecraft.
>
> "A depot within a decade seems incredible. I hope there will be
> someone to use it," Dr Andrew Cheng, a planetary scientist at Johns
> Hopkins University's Applied Physics Laboratory told the Associated
> Press.
>
> "And I have high hopes that commercial uses of space will become
> profitable beyond Earth orbit. Maybe the time has come."
>
> Prof Jay Melosh from Purdue University said that the costs were just
> too high, calling space exploration "a sport that only wealthy
> nations, and those wishing to demonstrate their technical prowess, can
> afford to indulge."
>
> Eric Anderson, who co-founded the space tourism firm Space Adventures,
> said he was used to sceptics.
>
> "Before we started launching people into space as private citizens,
> people thought that was a pie-in-the-sky idea," He said.
>
> "We're in this for decades. But it's not a charity. And we'll make
> money from the beginning."