Analiza podora na poti Ravenska Kočna - Kranjska koča na Ledinah (skozi Žrelo) : diplomsko delo

Pesjak, Nejc (author), Vrabec, Marko (mentor), Šmuc, Andrej (comentor), Popit, Tomislav (member of the commission for defense), Verbovšek, Timotej (member of the commission for defense)

Planinska pot Ravenska Kočna - Kranjska koča na Ledinah (skozi Žrelo) leži v dolini Ravenske Kočne v jugovzhodnem delu občine Jezersko. Zaradi podora je pot od septembra 2020 zaprta. Obravnavano območje leži v prelomni coni Skutskega preloma in številnih manjših prelomov, zaradi česar je izrazito tektonsko pretrto. Strma pobočja ter krhki, močno pretrti apnenci, ki so dovzetni za fizikalno preperevanje, dodatno prispevajo k splošni nestabilnosti terena. Namen diplomskega dela je bil opisati obseg podora ter opredeliti njegove strukturne, sedimentološke in geomorfološke značilnosti. Za lažjo analizo območja, ki je zaradi strmih pobočij nevarno in nedostopno, smo izdelali 3D model območja. Planinsko pot ogroža več kritičnih mest, kjer zaradi podorov in aktivno se krušečih prelomnih con kamninski material neposredno pada na traso poti. Na območju Žrela smo prepoznali tri glavna podorna mesta ter več manjših. Pod podorom v zahodni steni je približno 10 metrov dolg odsek poti postal popolnoma neprehoden, ker so varovala popolnoma uničena. Pod obema podornima območjema v južni steni je poškodovan del poti bistveno daljši, saj skalni material neprestano pada na pobočje pod steno in v grabnu pod Žrelom. Na melišču pred vstopom v steno je jasno izražen transport materiala v obliki drobirskega toka, kar dodatno potrjuje aktivnost pobočnih procesov in njihovo neposredno ogrožanje planinske poti. V vzhodni steni skalnega ostenja je prisotnih več prelomov, razpok in manjših podorov, ki povzročajo stalno padanje materiala na spodnji del poti. Varovala so bila v preteklosti pogosto poškodovana ali uničena, potrebne so bile redne obnove. Na podlagi rezultatov je mogoče sklepati, da nadaljnje sanacije poškodovane poti ne bi predstavljale trajne rešitve. Kot dolgoročnejši ukrep zato predlagan umik trase poti v varnejše območje izven prelomnih con.

• Language: Slovenian
• Keywords: podor, pobočni procesi, Kamniško-Savinjske Alpe, planinska pot, prelom, 3D model
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Place of publishing: Ljubljana
• Publisher: N. Pesjak
• Year: 2026
• Number of pages: X, 36 f.
• PID: 20.500.12556/RUL-183399
• UDC: 55
• COBISS.SI-ID: 284537091
• Publication date in RUL: 12.06.2026

Secondary language

• Language: English
• Title: Analysis of the rockfall on the trail Ravenska Kočna - Kranjska koča na Ledinah (skozi Žrelo) : diploma work

Abstract

The Ravenska Kočna – Kranjska koča na Ledinah mountain trail (via Žrelo) is located in the Ravenska Kočna valley in the southeastern part of the Municipality of Jezersko. Due to a rockfall, the trail has been closed since September 2020. The studied area lies in the fault zone of the Skuta fault and several smaller faults, making it highly tectonically fractured. Steep slope gradients, together with brittle and strongly fractured limestones that are highly susceptible to physical weathering, further contribute to the overall instability of the terrain. The aim of this thesis was to describe the extent of the rockfall and to define its main structural, sedimentological, and geomorphological characteristics. To facilitate the analysis of this hazardous and largely inaccessible area, a 3D model of the study area was created. The trail is endangered at several critical locations where rock material, due to rockfalls and actively disintegrating fault zones, falls directly onto the trail. In the Žrelo area, three major rockfall sites, along with several smaller ones, were identified. Beneath the rockfall in the western wall, an approximately 10-meter-long section of the trail has become completely impassable because the safety installations have been entirely destroyed. The damaged section below the two rockfall areas in the southern wall is significantly longer, as rock material continuously falls onto the slope below the wall and into the gully beneath Žrelo. On the scree slope at the entrance to the wall, the transport of material by debris flow is clearly visible, further confirming the activity of slope processes and their direct impact on the hiking trail. In the eastern rock face, numerous faults, fractures, and smaller rockfalls are present, causing continuous rockfall onto the lower section of the trail. Safety installations have frequently been damaged or destroyed in the past, requiring regular maintenance. The results suggest that further rehabilitation of the damaged trail is not recommended. Instead, rerouting the trail to a safer area outside the main fault zones is proposed as a more sustainable long-term solution.

• Keywords: rockfall, slope processes, Kamnik–Savinja Alps, hiking trail, fault, 3D model