Monitoring of coal pillars yielding during room and pillar extraction at the great depth

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68145535%3A_____%2F18%3A00491705" target="_blank" >RIV/68145535:_____/18:00491705 - isvavai.cz</a>

Výsledek na webu

<a href="https://onepetro.org/ISRMEUROCK/proceedings-abstract/EUROCK18/All-EUROCK18/ISRM-EUROCK-2018-097/448923" target="_blank" >https://onepetro.org/ISRMEUROCK/proceedings-abstract/EUROCK18/All-EUROCK18/ISRM-EUROCK-2018-097/448923</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Monitoring of coal pillars yielding during room and pillar extraction at the great depth

Popis výsledku v původním jazyce

A considerable amount of coal reserves are located in protection pillars that lie under built-up region in active mining areas at the Czech part of the Upper Silesian Coal Basin. The commonly used controlled caving longwall mining method is not applicable in these areas because significant deformation of the surface is not permitted. For this reason the room and pillar method with stable coal pillars has been tested in order to minimise subsidence of surface. nStress-deformation monitoring was essential as this was the first application of the conventional room and pillar mining method within the Upper Silesian Coal Basin mines. More than six kilometres of roadways were driven within two panels during last three years. To determine pillar stability, vertical stress and horizontal displacement of coal pillars were measured in coal pillars which are located within a row of pillars forming the panels. Two monitored pillars diamond in shape and slightly irregular sides have been observed into the first mined panel “V” and three monitored pillars have been observed into the second panel “II”. To measure the increase in vertical stress due to mining, hydraulic stress cells were installed in each coal pillar. The 5-level multipoint rib extensometers measured displacements of all sides within each monitored pillar. The results of stress-deformation monitoring allowed pillar loading and yielding characteristics to be described. n

Název v anglickém jazyce

Monitoring of coal pillars yielding during room and pillar extraction at the great depth

Popis výsledku anglicky

A considerable amount of coal reserves are located in protection pillars that lie under built-up region in active mining areas at the Czech part of the Upper Silesian Coal Basin. The commonly used controlled caving longwall mining method is not applicable in these areas because significant deformation of the surface is not permitted. For this reason the room and pillar method with stable coal pillars has been tested in order to minimise subsidence of surface. nStress-deformation monitoring was essential as this was the first application of the conventional room and pillar mining method within the Upper Silesian Coal Basin mines. More than six kilometres of roadways were driven within two panels during last three years. To determine pillar stability, vertical stress and horizontal displacement of coal pillars were measured in coal pillars which are located within a row of pillars forming the panels. Two monitored pillars diamond in shape and slightly irregular sides have been observed into the first mined panel “V” and three monitored pillars have been observed into the second panel “II”. To measure the increase in vertical stress due to mining, hydraulic stress cells were installed in each coal pillar. The 5-level multipoint rib extensometers measured displacements of all sides within each monitored pillar. The results of stress-deformation monitoring allowed pillar loading and yielding characteristics to be described. n

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20703 - Mining and mineral processing

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

EUROCK 2018 - Geomechanics and Geodynamics of Rock Masses

ISBN

978-113861645-5

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

711-718

Název nakladatele

CRC Press/Balkema, Taylor and Francis Group

Místo vydání

London

Místo konání akce

Saint Petersburg

Datum konání akce

22. 5. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000570546600097