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Influence of stress on the permeability of coal and sedimentary rocks of the Upper Silesian Basin
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SYSNO ASEP 0359914 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Influence of stress on the permeability of coal and sedimentary rocks of the Upper Silesian Basin Author(s) Konečný, Pavel (UGN-S) RID
Kožušníková, Alena (UGN-S) RIDNumber of authors 2 Source Title International Journal of Rock Mechanics and Mining Sciences. - : Elsevier - ISSN 1365-1609
Roč. 48, č. 2 (2011), s. 347-352Number of pages 6 s. Publication form www - www Language eng - English Country GB - United Kingdom Keywords permeability ; triaxial test ; coal and sedimentary rocks Subject RIV DH - Mining, incl. Coal Mining CEZ AV0Z30860518 - UGN-S (2005-2011) UT WOS 000286980600016 DOI 10.1016/j.ijrmms.2010.11.017 Annotation The results of measurement of permeability in triaxial state of stress of sedimentary rocks and coal of the Upper Silesian basin is presented in this paper. The study of influence of stress on the permeability was performed by two methods. Permeability measurement during the increase of hydrostatic pressure and study of permeability changes due to the increase of axial stress. The cylindric tested specimens of sedimentary rocks and coal was used for laboratory experiments, the nitrogen was used as a reference gas. The experimental results of the measurement of more than 100 specimens showed that increasing of the hydrostatic pressure affect the pore medium by closing of the pores and cracks and by the decrease of the permeability. The presence and rising of the cracks and fractures in the process of failure multiply the filtration ability of the tested specimens. Therefore the permeability change is one of the very sensitive methods for the observation of the deformation process during the triaxial strength measurement. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2012 Electronic address http://www.sciencedirect.com/science/article/pii/S1365160910002194
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