Record details

Title
    Analysis of Äspö Pillar Stability Experiment: Continuous thermo-mechanical model development and calibration
Author
    Blaheta, Radim
    Byczanski, Petr
    Čermák, M.
    Hrtus, Rostislav
    Kohut, Roman
    Kolcun, Alexej
    Malík, Josef
    Sysala, Stanislav
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Journal of Rock Mechanics and Geotechnical Engineering
Vol./nr.
    Roč. 5, č. 2
Pages
    s. 124-135
Year
    2013
Notes
    Autoři celkem: 8
    Rozsah: 12 s. : E
Subject category
    continuous mechanics
    damage of granite rocks
    Finite element method (FEM)
    in situ pillar stability experiment
    model calibration by back analysis
Keyword
    Analysis
    Äspö
    Calibration
    Continuous
    Development
    Experiment
    Model
    Pillar
    Stability
    Thermo-mechanical
Abstract (in english)
   The paper describes an analysis of thermo-mechanical (TM) processes appearing during the Äspö Pillar Stability Experiment (APSE). This analysis is based on finite elements with elasticity, plasticity and damage mechanics models of rock behaviour and some least squares calibration techniques. The main aim is to examine the capability of continuous mechanics models to predict brittle damage behaviour of granite rocks. The performed simulations use an in-house finite element software GEM and self-developed experimental continuum damage MATLAB code. The main contributions are twofold.First, it is an inverse analysis, which is used for (1)verification of an initial stress measurement by back analysis of convergence measurement during construction of the access tunnel and (2)identification of heat transfer rock mass properties by an inverse method based on the known heat sources and temperature measurements.
   Second, three different hierarchically built models are used to estimate the pillar damage zones, i.e. elastic model with Drucker-Prager strength criterion, elasto-plastic model with the same yield limit and a combination of elasto-plasticity with continuum damage mechanics.
Contributor
    AV ČR Brno, Ústav geoniky
Contributor code
    AV ČR, ÚG
Source format
    U
Import date
    24. 10. 2014