Assessing the Efficiency of Thermochemical Pressurization in the Jiweishan Rockslide

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F23%3A10476851" target="_blank" >RIV/00216208:11310/23:10476851 - isvavai.cz</a>

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=94x9jewk71" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=94x9jewk71</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00603-023-03639-y" target="_blank" >10.1007/s00603-023-03639-y</a>

Result language

angličtina

Original language name

Assessing the Efficiency of Thermochemical Pressurization in the Jiweishan Rockslide

Original language description

Thermochemical pressurization is a possible weakening mechanism that could explain the hypermobility of large landslides in carbonate rock. However, the factors controlling the efficiency of this mechanism in generating hypermobility have not been elucidated. Here, we use mass and energy conservation equations - accounting for the thermal decomposition of carbonate and a thermoporoelastic mechanism - to evaluate the efficiency of thermochemical pressurization in the 2009 Jiweishan rockslide event in China. We consider distinct permeability functions for the shear zone and the rock wall, controlled by distinct mechanical processes, and explore the sensitivity of the model to changes in the values of the key parameters. We evaluate that a combination of pore pressure increase and the endothermic nature of the chemical reaction may effectively limit frictional heating. We observe that the increase in pore pressure is controlled by the permeability of the rock wall rather than by that of the shear zone and its thickness. We also find that the permeability of the damaged rock wall is the key factor controlling the energy ratio-a measure of efficiency. We conclude that the comparatively low velocity and small thickness of the sliding body, and the relatively high permeability of the formation in which the Jiweishan landslide developed may have limited the effect of thermal decomposition.

Czech name

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Czech description

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Type

J_imp - 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

Name of the periodical

Rock Mechanics and Rock Engineering

ISSN

0723-2632

e-ISSN

1434-453X

Volume of the periodical

57

Issue of the periodical within the volume

2

Country of publishing house

AT - AUSTRIA

Number of pages

14

Pages from-to

793-806

UT code for WoS article

001101725500001

EID of the result in the Scopus database

2-s2.0-85176812802