Experimental Study on Basic Mechanical Properties of Water-saturated Coal
YU Yanbin
ZHOU Gang
CHEN Lianjun
ZHOU Bo
TIAN Xianghong
Abstract：The uniaxial compression and tensile tests of coal samples in both water-saturated and natural states were carried out with MTS electro-hydraulic servo rock test system, it was found from the test results that the uniaxial compressive strength of water-saturated coal samples decreased by 26. 71% as compared to that in natural state, the elastic modulus decreased by 26. 85%, the axial strain increased, and the hardness coefficient and Poisson’ s ratio decreased to some extent; the tensile strength of water-saturated coal samples decreased by 43. 86% on an average and the damage time greatly shortened. In addition, the uniaxial compression and tensile test curves of coal samples were all in jagged forms, the uniaxial compression course of coal samples successively went through four phases, including the fissures compaction, the apparent line elastic deformation, the elastic and plastic deformation and the failure, and in the tensile test, the force exerted on coal samples increased linearly until the instability failure occurred instantaneously.
Keywords：water-saturated coalnatural coalmechanical propertyuniaxial compressiontensile
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 4-7 )