Characterization and 3D visualization of underground research facility for deep geological repository experiments: A case study of underground research facility Bukov, Czech Republic

Modelling of sensitivity of underground space stability to the in situ stress uncertainties: case study at the Bukov underground research facility phase II (Rozna mine, Czechia)

“…(Bukovská et al, 2020;Souček et al, 2018 To extrapolate the averaged Hoek-Brown parameters from intact rock samples to filed-scale values, the Geological Strength Index ( ) of the rock mass was employed (Hoek et al, 2013). Structural characteristics including persistence, roughness, undulation, and opening and filling of rock mass discontinuities were previously documented on the uncovered opening walls within the Bukov URF -Phase I (Bukovská et al, 2019;Souček et al, 2018). The was then calculated using two different methods:…”

“…The region of interest is formed by a highly metamorphosed volcano-sedimentary rock sequence at the north-eastern edge of the Strážek Moldanubicum Unit of the Bohemian Massif (Bukovská et al, 2019;Kříbek and Hájek, 2005;Ptáček et al, 2013;Souček et al, 2017;Vavro et al, 2015). The dominant rock types are paragneisses, migmatites and amphibolites with minor intercalation of calc-silicate rocks, marbles, granulites, granites/pegmatites, and peridotites.…”

“…Laboratory testing was conducted in three different directions to their metamorphic foliation planes. The aim was to capture the anisotropy of mechanical and deformation properties, which is in the rock mass in question very well-known (Bukovská et al, 2020;Bukovská et al, 2019;Souček et al, 2018;Vavro et al, 2015). Testing results are summarised in (Patocka and Jaros, 2020;Ptáček et al, 2013).…”

“…Deep geological repositories (DGRs) have been constructed all over the world for disposal of high-level radioactive waste and spent nuclear fuel, which has been widely accepted to be the safest way of long-term isolation and containment of such waste materials (Apted and Ahn, 2017;Feiveson et al, 2011). A large number of underground research facilities (URFs) have also been built in many countries to investigate the geological, geomechanical and environmental issues of such DGRs and to study their isolation ability and performance (Apted, 2019;Bukovská et al, 2019;Delay et al, 2014;Laverov et al, 2016;NEA-OECD, 2013;Wang et al, 2018). The first part of the Bukov URF, which contains 475 m of galleries in total, was successfully constructed between 2013 and 2017 in the Rožná Mine area (hereinafter referred to as the Bukov URF -Phase I) (Souček et al, 2017).…”

Mechanical Properties of Granulite From Horní Bory in Bohemian Massif

“…It is a consensus that the waste repository will be located in crystalline rocks, similar to pilot projects in Sweden and Finland [15,16]. The waste is planned to be stored up to a maximum depth of 500 m below surface [10]. Recently, several geologically suitable deposition sites have been identified [9], with two highly favourable sites: Horka near Velké Meziříčí in syenitic rocks [17 and references therein] and Kraví hora near Dolní Rožínka in granulitic rocks.…”