mirror of
https://expo.survex.com/repositories/expoweb/.git/
synced 2024-11-25 16:52:00 +00:00
221 lines
11 KiB
HTML
221 lines
11 KiB
HTML
<!DOCTYPE html>
|
|
<!-- saved from url=(0057)https://www.fuw.edu.pl/~rwaszkiewicz/fishface/report.html -->
|
|
<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
|
|
|
|
<meta name="viewport" content="width=device-width">
|
|
<title>Fishface → SMK</title>
|
|
|
|
<link href="./Fishface-SMK_files/bootstrap.min.css" rel="stylesheet" integrity="sha384-GLhlTQ8iRABdZLl6O3oVMWSktQOp6b7In1Zl3/Jr59b6EGGoI1aFkw7cmDA6j6gD" crossorigin="anonymous">
|
|
|
|
<style>
|
|
.cover-container {
|
|
max-width: 70em;
|
|
}
|
|
emph {
|
|
font-style: italic;
|
|
font-weight: 800;
|
|
}
|
|
quote {
|
|
font-style: italic;
|
|
font-weight: 200;
|
|
}
|
|
img {
|
|
margin: 1em;
|
|
}
|
|
</style>
|
|
<style>[id*='google_ads_iframe'],[id*='taboola-'],.taboolaHeight,.taboola-placeholder,#credential_picker_container,#credential_picker_iframe,.google-one-tap-modal-div{display:none!important;min-height:0!important;height:0!important;}</style><script type="text/javascript" data-name="TokenSigning" data-by="Web-eID extension" src="chrome-extension://ncibgoaomkmdpilpocfeponihegamlic/token-signing-page-script.js"></script></head>
|
|
<body class="d-flex h-100 text-white bg-dark">
|
|
|
|
<div class="cover-container d-flex w-100 h-100 p-3 mx-auto flex-column
|
|
justify-content-center">
|
|
<h1>How to go about connecting <i>Fishface</i> to <i>SMK</i> system</h1>
|
|
<p>by Radost Waszkiewicz (8 March 2023)</p>
|
|
<h2>My goals</h2>
|
|
<p>
|
|
</p><ul>
|
|
<li>When in Austria, work towards the goal of connecting Fishface to
|
|
the
|
|
SMK system more effectively.</li>
|
|
<li>Make survey data more informative. Expand current connection
|
|
approach beyond measuring straight line distance.</li>
|
|
<li>Assess the efficacy of the <emph>deep connection</emph> target for
|
|
the
|
|
upcoming expo.</li>
|
|
<li>Refresh my memory of Fishface system, Survex, QMs and survey
|
|
wallets.</li>
|
|
</ul>
|
|
<p></p>
|
|
|
|
<h2>Analysis of the current situation</h2>
|
|
|
|
<p>CUCC expoers often refer to horizontal levels and connections between
|
|
them when talking about exploration in Austria and many have played
|
|
around with Survex/Aven trying to align (by eye) different cave-rich
|
|
levels to get a better understanding of what's going on. I tried to
|
|
quantify
|
|
this method using the avaliable svx data with a particular emphasis on
|
|
the
|
|
Fishface area.</p>
|
|
<p>I have imported all the survey legs in <emph>290 291 204</emph> and
|
|
<emph>161</emph>,
|
|
and produced a histogram of the directions in which these legs were
|
|
shot. After eliminating short legs (less than 3m) and the vertical legs,
|
|
you can plot them using an equal area projection (according to wikipedia
|
|
apparently used also by some geologists). On such a histogram, the
|
|
sphere containing all possible shot directions is mapped onto a disk of
|
|
radius 2 with equator being mapped onto a circle of radius sqrt(2) --
|
|
marked on the figure, and since this is equal area projection, higher
|
|
density means acually higher density in reality (and not just
|
|
transformation artifacts).</p>
|
|
|
|
<div class="d-flex justify-content-center">
|
|
<img src="./Fishface-SMK_files/shot_directions.svg" style="width: 50em; height: 30em;">
|
|
</div>
|
|
|
|
<p class="fst-italic">Figure: Survey shot directions displayed using
|
|
Lambert azimuthal equal-area projection. Dashed circles correspond to
|
|
horizontal and vertical shots, while solid circle shows tilted
|
|
cave-rich.</p>
|
|
|
|
<p>As expected, typical, non-vertical legs are roughly horizontal, but
|
|
there is a systematic deviation from that horizontal pattern -- legs
|
|
shot westward are more likely going down. The overrepresented directions
|
|
line up on plane which, in this projection, is a near-circular loop.
|
|
(Equations of great circles in this projections are surprisingly hard to
|
|
find.) Additionally, I have marked normal direction to the plane of
|
|
interest to make it easier to see how much and in what direction this
|
|
plane is tilted.
|
|
</p>
|
|
|
|
<p>The cave-rich plane is tilted down by 13.5° in the direction of 120°
|
|
(roughly ESE). As a result, for each meter we travel in the approx
|
|
eastward direction, we are expected to drop down by 24cm. With
|
|
Fishface-SMK gap being at least 150m, this gives 35m elevation change.
|
|
</p>
|
|
|
|
<div class="d-flex justify-content-center">
|
|
<iframe src="./Fishface-SMK_files/cave_with_layers.html" title="3D widget in iframe" style="width: 50em; height: 30em;"></iframe>
|
|
</div>
|
|
<p class="fst-italic">To see working 3D plot, visit the original copy of
|
|
this page at <a href="https://www.fuw.edu.pl/~rwaszkiewicz/fishface/report.html">
|
|
www.fuw.edu.pl/~rwaszkiewicz/fishface/report.html</a>
|
|
|
|
<p class="fst-italic">3D Figure: Fishface+Happy butterfly in relation to
|
|
204 and 161 colored by levels. Note vertical shift in the levels due to
|
|
east-west gap (at 15° slope we get 30cm up per meter distance). The
|
|
proposed connection strategies are marked in red and pink respectively.
|
|
'Shallow' connection strategy lines up with light-green cave-rich level.</p>
|
|
<h2>'Shallow' connection strategy</h2>
|
|
<p>
|
|
My proposed strategy is to continue from <emph>290.whipingbalconysarse.27</emph>
|
|
(QMC 2.5mx1m) towards <emph>204.midlevel.pretzelpassage2.31</emph> for
|
|
300m at a gradient of 14.5°.
|
|
<b>or</b>
|
|
from <emph>290.redlight.9</emph> via QMB (3mx2m tube across a traverse)
|
|
towards <emph>204.midlevel.pretzelpassage2.31</emph> 280 meters away at
|
|
a gradient of 16°.
|
|
</p>
|
|
|
|
<p>
|
|
<emph>290.whipingbalconysarse.27</emph> looks like heading in the right
|
|
direction and drafting in the Fishface direction (consistent with higher
|
|
entrance of Balcon), albeit not a great lead by Rob Watson's description.
|
|
<a href="http://expo.survex.com/logbookentry/2022-08-07/2022_s40">Source:</a>
|
|
<quote>After setting up the cave link and failing to send/recieve
|
|
anything we had a curry. Then Mike and I headed off to survey
|
|
Balcony's arse while Luke and the Jape fettled the Cave Link. Got very
|
|
muddy in the Arse only to break out at a junction, where we elected to
|
|
look at the meander rather than the small tube higher up. Left a QMC
|
|
pissing off upstream then back to camp for noodles. Schnapps and bed.
|
|
</quote><br>
|
|
<img src="./Fishface-SMK_files/robs_notes.png" style="display:inline; max-width: 30em;">
|
|
<img src="./Fishface-SMK_files/whiping_plan.jpg" style="display:inline; max-width: 30em;">
|
|
</p>
|
|
|
|
<p>
|
|
<emph>290.redlight.9</emph> large phreas heading in the right direction
|
|
in a area with good draft. Surveys further down mention no draft so it
|
|
seems it has to dissapear (hopefully into that QM).
|
|
<a href="http://expo.survex.com/logbookentry/2022-08-02/2022_s18">Source:</a>
|
|
<quote>[...] but became too difficult to continue without a traverse
|
|
line but promising [phreas] visable 50m further along.</quote><br>
|
|
<img src="./Fishface-SMK_files/redlight_plan.jpg" style="display:inline; max-width: 30em;
|
|
max-height: 60em;">
|
|
</p>
|
|
|
|
|
|
<p>
|
|
<emph>204.midlevel.pretzelpassage2.31</emph> great looking QMA with
|
|
stones rumbling for 8 seconds. From the description (and drawing)
|
|
starting with a large void. Not explored further because it was partly a
|
|
derig trip and run out of time. Looking at the drawing it might go in
|
|
the right direction (west).
|
|
<a href="http://expo.survex.com/logbookentry/2012-08-27/2012_s66">Source:</a>
|
|
<quote>This led along an attractive thick cracked mud floor to ...
|
|
another large chamber with the sound of much water. We though this
|
|
might well be the same chamber we'd encountered on our initial survey
|
|
though when the data went in we were less convinced as the two ends
|
|
were 43m apart but it is still plausible.</quote><br>
|
|
<img src="./Fishface-SMK_files/pretzel_plan.png" style="display:inline; max-width: 30em;
|
|
max-height: 60em;">
|
|
</p>
|
|
|
|
<h2>Deep connection alternative</h2>
|
|
|
|
<p>
|
|
Greedily searching for two points in respective systems underground that
|
|
are closest together gives different potential connection endpoints with
|
|
<emph>204.deepsouth.razor11.13</emph> near <emph>204.deepsouth.razor12</emph>.
|
|
This location is literally as deep as it gets -- it's a traverse over a
|
|
pool of water with some QMs in the ceiling and is unlikely to be
|
|
explored from this side. We might emerge here if we start from Fishface
|
|
side but starting here seems unwise.
|
|
|
|
<a href="http://expo.survex.com/logbookentry/2007-07-19/2007_s73">Source:</a>
|
|
<quote>Andreas rigged a traverse where the slot began to widen +
|
|
reached a stance overlooking a deep, dark pool of water.</quote><br>
|
|
<img src="./Fishface-SMK_files/razor_elev.jpg" style="display:inline; max-width: 30em;
|
|
max-height: 60em;">
|
|
</p>
|
|
|
|
<h2>Strategic considerations</h2>
|
|
<p>The way I interpret CUCC expos mission, we should prioritize two things:
|
|
</p><ul>
|
|
<li>itroducing new cavers to expeditioning,</li>
|
|
<li>Expo long term sustainability.</li>
|
|
</ul>
|
|
In my opinion, both of these are better served by pushing shallow leads
|
|
and connecting Fishface to SMK as soon as possible. A few years ago, one
|
|
of the targets was to search for a new 'east' surface camp to aid
|
|
exploration in Homecoming, which is really quite far from the
|
|
Stonebridge. One of the arguments for deep caving is that we'll have
|
|
underground camp reducing crowds in the Stonebridge -- perhaps a better
|
|
way to go about that is to have another surface camp near Fishface (or
|
|
even better between Fishface and Homecoming)?
|
|
<p></p>
|
|
|
|
<h2>Conclusions</h2>
|
|
<p>
|
|
</p><ul>
|
|
<li>Cave-rich levels are real (duh!) and can be seen on shot direction
|
|
histogram.</li>
|
|
<li>Cave-rich planes are tilted in ESE direction by about 15°.</li>
|
|
<li>We should aim higher in Balcony than in Fishface because of E-W
|
|
distance.</li>
|
|
<li>Mid-level balcony has a QMA+ in a favourable location.</li>
|
|
<li>Deep Balcony is bottomed. We're unlikely to find another cave-rich
|
|
plane containing current bottom.</li>
|
|
<li>I'm strongly advocating for 'shallow' conneciton strategy over
|
|
'deep' connection strategy.</li>
|
|
</ul>
|
|
<p></p>
|
|
|
|
|
|
</div>
|
|
|
|
<hr />
|
|
<p>PS If the iframe does not work for you, here is a static snapshot:
|
|
<img src="static-3d-plot.png">
|
|
|
|
|
|
</body></html> |