Compressibility and Fractal Dimension Analysis in the Bituminous Coal Specimens
International Journal of Oil, Gas and Coal Engineering
Volume 6, Issue 1, January 2018, Pages: 25-39
Received: Mar. 6, 2018; Accepted: Mar. 20, 2018; Published: Apr. 14, 2018
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Authors
Bo Zhang, School of Mechanics & Civil Engineering, China University of Mining and Technology (Beijing), Beijing, China
Jie Zhu, School of Mechanics & Civil Engineering, China University of Mining and Technology (Beijing), Beijing, China; State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China
Fa He, School of Mechanics & Civil Engineering, China University of Mining and Technology (Beijing), Beijing, China
Yaodong Jiang, School of Mechanics & Civil Engineering, China University of Mining and Technology (Beijing), Beijing, China
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Abstract
The fractal characteristics of pore structures in six coal samples with the same rank were investigated. Insights into the relationship between fractal dimension and pore structure parameter were provided. Compressibility effect on the mercury intrusion porosimetry (MIP) data was evaluated. N2 adsorption (NA) and mercury intrusion porosimetry were applied to analyze the pore structure of coal. The mercury intrusion process was divided into three stages including interpore filling, large intrapore filling and small intrapore filling with compression. Three pore fractal dimensions corresponding to the three stages, D1C, D2C, and D3C were calculated with the Brooks–Corey capillary pressure model. Df calculated with Farin model is used to estimate an overall fractal dimension. The correlation between the pore fractal dimension and the pore size distribution (PSD) characteristics was further discussed.
Keywords
Pore Size Distribution, Fractal Dimension, Compressibility, Mercury Intrusion Porosimetry (MIP), Nitrogen Adsorption (NA)
To cite this article
Bo Zhang, Jie Zhu, Fa He, Yaodong Jiang, Compressibility and Fractal Dimension Analysis in the Bituminous Coal Specimens, International Journal of Oil, Gas and Coal Engineering. Vol. 6, No. 1, 2018, pp. 25-39. doi: 10.11648/j.ogce.20180601.14
Copyright
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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