Record details

    Analysis of Äspö Pillar Stability Experiment: Continuous thermo-mechanical model development and calibration
    Blaheta, Radim
    Byczanski, Petr
    Čermák, M.
    Hrtus, Rostislav
    Kohut, Roman
    Kolcun, Alexej
    Malík, Josef
    Sysala, Stanislav
Publication type
    článek v odborném periodiku
Source title - serial
    Journal of Rock Mechanics and Geotechnical Engineering
    Roč. 5, č. 2
    s. 124-135
    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
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.
    AV ČR Brno, Ústav geoniky
Contributor code
    AV ČR, ÚG
Source format
Import date
    24. 10. 2014