Seepage Law of Gas-Containing Coal on Loading Condition

Abstract:

To further study, mesoscopic percolation evolution of gas-containing coal on loading conditions, this paper uses a self-developed loading system in seepage experiments to study the permeability changes of gas-containing coal on loading conditions, and it conducts CT reconstruction scan experiments on some pressure points. The results show that the permeability of coal samples decreases with increasing axial pressure when the air inlet pressure and confining pressure remain constant. It can be drawn by observation of the coal pore three-dimensional reconstructed images that when axial pressure increases to a certain value as well as other stress conditions remain unchanged, continue to increase the axial compression, coal pores and fissures appear contraction and even close, and the permeability of coal gets a reduction.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 3683-3687
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.3683
• Online since: January 2013
• Authors: Zhen Liu, Xiao Qiang Qin, Lin Chao Dai, Ting Hong, Chuan Jia
• Keywords: CoAl, Gas, Seepage, Three-Dimensional Reconstruction

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