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