Influence of Pressure on Application of Mercury Injection Capillary Pressure for Determining Coal Compressibility

Abstract:

Mercury injection capillary pressures (MICP) on the coal samples were measured with a variety of pressure regimes. The goal was to compare the effects of different pressure regimes for determining the compressibility of the coal. The two samples were taken from Northeast China. MICP profiles up to 204 MPa were measured on two different crushed samples of the same size. Three linear regimes namely, at 10-40 MPa, 40-100 MPa and P>100 Mpa are defined, corresponding with the diameters of mesopore and microspore. The standard deviations of the compressibility values were less than 20%. The results from the present study suggest that the different pressure regimes affect the compressibility values slightly.

• Periodical: Applied Mechanics and Materials (Volumes 295-298)
• Pages: 2726-2731
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.295-298.2726
• Online since: February 2013
• Authors: Xiao Qian Guo, Da Meng Liu, Yan Bin Yao, Yi Dong Cai, Jun Qian Li
• Keywords: Coal Matrix, Compressibility, Mercury Injection Capillary Pressure, Pressure Regime

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