Permeability changes of coal cores and briquettes under tri-axial stress conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68145535%3A_____%2F14%3A00437714" target="_blank" >RIV/68145535:_____/14:00437714 - isvavai.cz</a>

Výsledek na webu

<a href="http://mining.archives.pl" target="_blank" >http://mining.archives.pl</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2478/amsc-2014-0079" target="_blank" >10.2478/amsc-2014-0079</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Permeability changes of coal cores and briquettes under tri-axial stress conditions

Popis výsledku v původním jazyce

The paper is dealing with the permeability of coal in triaxial state of stress. The permeability of coal, besides coal?s methane capacity, is the main parameter determining the quantity of methane inflow into underground excavations. The stress in a coalseam is one of the most important factors influencing coal permeability therefore the permeability measurements were performed in tri-axial state of stress. The hydrostatic three-axial state of stress was gradually increased from 5MPa with steps of 5MPaup to a maximum of 30MPa. Nitrogen was applied as a gas medium in all experiments. The results of the permeability measurements of coal cores from the ?Zofiówka mine, Poland, and three mines from the Czech Republic are presented in this paper. As a ?reference, permeability measurements were also taken for coal briquettes prepared from coal dust with defined porosity. It was confirmed that the decreasing porosity of coal briquettes affects the decreasing permeability.

Název v anglickém jazyce

Permeability changes of coal cores and briquettes under tri-axial stress conditions

Popis výsledku anglicky

The paper is dealing with the permeability of coal in triaxial state of stress. The permeability of coal, besides coal?s methane capacity, is the main parameter determining the quantity of methane inflow into underground excavations. The stress in a coalseam is one of the most important factors influencing coal permeability therefore the permeability measurements were performed in tri-axial state of stress. The hydrostatic three-axial state of stress was gradually increased from 5MPa with steps of 5MPaup to a maximum of 30MPa. Nitrogen was applied as a gas medium in all experiments. The results of the permeability measurements of coal cores from the ?Zofiówka mine, Poland, and three mines from the Czech Republic are presented in this paper. As a ?reference, permeability measurements were also taken for coal briquettes prepared from coal dust with defined porosity. It was confirmed that the decreasing porosity of coal briquettes affects the decreasing permeability.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DH - Báňský průmysl včetně těžby a zpracování uhlí

OECD FORD obor

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Projekt

<a href="/cs/project/ED2.1.00%2F03.0082" target="_blank" >ED2.1.00/03.0082: Institut čistých technologií těžby a užití energetických surovin</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Archives of Mining Sciences

ISSN

0860-7001

e-ISSN

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Svazek periodika

59

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

PL - Polská republika

Počet stran výsledku

11

Strana od-do

1129-1138

Kód UT WoS článku

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EID výsledku v databázi Scopus

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