Influencing Factors of the Young’s Modulus of Anthracite Coals

Jun Qian Li; Da Meng Liu; Yan Bin Yao; Yi Dong Cai

doi:10.4028/www.scientific.net/AMM.295-298.2762

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Influencing Factors of the Young’s Modulus of Anthracite Coals
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 295-298Influencing Factors of the Young’s Modulus of...

Influencing Factors of the Young’s Modulus of Anthracite Coals

Abstract:

In this paper, the influencing factors of the Young’s modulus of coals were investigated by measuring the stress-strain behaviors under different confining stress and water ratio conditions and constituents for 13 anthracite coal samples obtained from the southern Qinshui basin of China. The results show that: (1) For a coal, its Young’s modulus increases in the form of convex increasing parabolic curve with increasing confining stress acting on the coal but reduces with increasing water ratio in the form of convex decreasing parabola. (2) The Young’s modulus of coals is negatively proportional to fixed carbon and vitrite contents; while it positively related to inertite content. The Young’s modulus of coals becomes remarkable when ash yield is of larger than about 11%. The coals with 60% vitrinite and 40% inertinite contents have the maximum Young’s modulus.