Assessment of coal pillar behaviour at great depth using numerical models

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Assessment of coal pillar behaviour at great depth using numerical models

Popis výsledku v původním jazyce

Room and Pillar method was used to develop shaft protection pillar, below 850 m from the surface at CSM mine of Upper Silesian Coal Basin of Czech Republic. First panel V was developed on rhomboid shaped pillars of different sizes by driving roadway of 3.5-4.5 m in height and 5.2 m in width. Field study was conducted using different geo-technical instruments. This study revealed that core of the pillar is softening too due to yielding characteristics. Further, to understand the behaviour of coal pillar, numerical modelling was carried out using FLAC3D. Mohr-Coulomb strain-softening and Mohr-Coulomb plasticity constitutive models were adopted for coal seam/poor strata and competent strata respectively. The extent of yielding of coal pillar was decided by the observed contour of the stresses and tensile/shears failure in the model. Results obtained on numerical models were validated and found to be in good tune with the actual monitored pillar behaviour.

Název v anglickém jazyce

Assessment of coal pillar behaviour at great depth using numerical models

Popis výsledku anglicky

Room and Pillar method was used to develop shaft protection pillar, below 850 m from the surface at CSM mine of Upper Silesian Coal Basin of Czech Republic. First panel V was developed on rhomboid shaped pillars of different sizes by driving roadway of 3.5-4.5 m in height and 5.2 m in width. Field study was conducted using different geo-technical instruments. This study revealed that core of the pillar is softening too due to yielding characteristics. Further, to understand the behaviour of coal pillar, numerical modelling was carried out using FLAC3D. Mohr-Coulomb strain-softening and Mohr-Coulomb plasticity constitutive models were adopted for coal seam/poor strata and competent strata respectively. The extent of yielding of coal pillar was decided by the observed contour of the stresses and tensile/shears failure in the model. Results obtained on numerical models were validated and found to be in good tune with the actual monitored pillar behaviour.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20301 - Mechanical engineering

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Rock Mechanics for Natural Resources and Infrastructure Development - Full Papers

ISBN

978-0-367-42284-4

ISSN

2639-7749

e-ISSN

2639-7757

Počet stran výsledku

9

Strana od-do

2812-2820

Název nakladatele

CRC Press/Balkema

Místo vydání

Leiden

Místo konání akce

Foz do Iguassu

Datum konání akce

13. 9. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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