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

Title:

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

Creator:

Gong, Libin, Souček, Kamil, Waclawik, Petr, Vavro, Martin, Stas, Lubomir, Nemčík, Ján, and Ram, Sahendra

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:b80aa3ee-fa03-4af3-a5b2-3747636a592a
uuid:b80aa3ee-fa03-4af3-a5b2-3747636a592a
issn:1214-9705
doi:10.13168/AGG.2021.0022

Subject:

numerické modelování, numerical modeling, in situ stress, strength-stress ratio, roadway convergence, stability model, 7, and 551

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

Numerical modelling has been widely used in the underground excavation design, where the in situ stress state plays a crucial role in the stability analysis. However, determination of an exact stress state for a specific geological region remains uncertain due to the complicated tectonic nature and measurement limitations. The stability is thus better analysed by considering the in situ stress as a finite spectrum and pinpointing the possible worst-case scenario. The most probable scenarios of in situ stress states in the Rožná mine area were analysed based on the varying trends in principal stress ratio and mean stress values obtained from four different measurement/analysis campaigns. The influence of different in situ stress judgement on the deformation and failure characteristics of the Bukov Underground Research Facility (URF) (Phase II, Czech) were investigated by the finite volume program FLAC3D. Results show that the increased horizontal stress anisotropy and the mean stress level jointly increase the overall deformation and lower the URF stability. Such influences on the roadway horizontal convergence are more considerable than the vertical ones. A mathematical model considering mean stress and horizontal stress ratio was proposed to quantitatively describe the overall stability, especially useful for excavations possessing complicated configuration., Libin Gong, Kamil Soucek, Petr Waclawik, Martin Vavro, Lubomir Stas, Jan Nemcik and Sahendra Ram., and Obsahuje bibliografii

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

319-334

Source:

Acta geodynamica et geomaterialia : | 2021 Volume:18 | Number:3 (203)

Harvested from:

CDK

Metadata only:

false