Effect of particle crushing- and thermally induced pressurization on rockslide mobility

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F23%3A10476858" target="_blank" >RIV/00216208:11310/23:10476858 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=~F2dmazVm7" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=~F2dmazVm7</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10346-023-02053-3" target="_blank" >10.1007/s10346-023-02053-3</a>

Result language
angličtina
Original language name
Effect of particle crushing- and thermally induced pressurization on rockslide mobility
Original language description
Large rockslides often exhibit long runout, suggesting a low mobilized shear resistance within their shear zone. Various weakening mechanisms are proposed to explain the hypermobility of rockslides. To describe a specific event, a single mechanism is usually invoked, which is thought to dominate the entire runout. Herein, with reference to largely coherent landslides with a water-saturated shear zone, we explore how the combined action of particle crushing and thermal pressurization might cause hypermobility by promoting pore-water pressure buildup. We develop a simple model based on mass and energy conservation for a block sliding on an inclined plane that we solve numerically. Parameter study is also applied to the model. The results indicated that these two mechanisms could have comparable magnitude, and their synergy might promote longer runout. We suggest that particle crushing could control the initial rapid acceleration, but its contribution may gradually fade as an ultimate particle size distribution is attained and thermally induced pressurization may become dominant. Particle crushing may lower the permeability and compressibility of the shear-zone material, enhancing the subsequent pressurization and runout.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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