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)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68145535%3A_____%2F21%3A00546770" target="_blank" >RIV/68145535:_____/21:00546770 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.irsm.cas.cz/index_en.php?page=acta_detail_doi&id=403" target="_blank" >https://www.irsm.cas.cz/index_en.php?page=acta_detail_doi&id=403</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.13168/AGG.2021.0022" target="_blank" >10.13168/AGG.2021.0022</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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)

Popis výsledku v původním jazyce

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 exactnstress 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 situnstress 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 trendsnin 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 failurencharacteristics of the Bukov Underground Research Facility (URF) (Phase II, Czech) were investigated by the finite volume program FLAC3D. Results show that the increased horizontalnstress 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 thannthe 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.n

Název v anglickém jazyce

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)

Popis výsledku anglicky

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 exactnstress 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 situnstress 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 trendsnin 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 failurencharacteristics of the Bukov Underground Research Facility (URF) (Phase II, Czech) were investigated by the finite volume program FLAC3D. Results show that the increased horizontalnstress 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 thannthe 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.n

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20703 - Mining and mineral processing

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Acta geodynamica et geomaterialia

ISSN

1214-9705

e-ISSN

2336-4351

Svazek periodika

18

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

16

Strana od-do

319-334

Kód UT WoS článku

000729653600003

EID výsledku v databázi Scopus

2-s2.0-85120807835