Experimental Study on Microscopic Structure and Permeability of Tectonic Soft Coal

Kui Gao; Wei Yi Xue

doi:10.4028/www.scientific.net/AMR.734-737.241

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 734-737Experimental Study on Microscopic Structure and...

Experimental Study on Microscopic Structure and Permeability of Tectonic Soft Coal

Abstract:

To analyze the mining effect to gas permeability of tectonic soft coal seam, we choose typical sample from tectonic soft coal, study the gas permeability and microstructure. The results suggest that tectonic soft coal has been badly destroyed, and its micro fracture pore develops. Confining pressure has a great influence on the permeability of tectonic soft coal. When gas pressure remains constant, with the increase of confining pressure of tectonic soft coal permeability began to decrease very fast. But when decreasing to a certain degree, it changes slowly; when confining pressure remains constant, with the increase of gas pressure, permeability of tectonic soft coal first decreases and then increases. Under the condition of low gas pressure, tectonic soft coal permeability shows a significant Klinkenberg effect.

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Periodical:

Advanced Materials Research (Volumes 734-737)

Pages:

241-245

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.734-737.241

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Online since:

August 2013

Authors:

Kui Gao, Wei Yi Xue

Keywords:

Gas Pressure, Penetration Test, Permeability, Surrounding Rock Pressure, Tectonic Soft Coal

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