Experimental study on mechanical properties of immersed coal body
WANG Sulong
SUN Di
Abstract：The strength of coal body is an important index to ensure the safe mining of the working face.The static and dynamic compressive strength of the coal sample of the water-rich coal seam of 11 # coal in a certain mine was tested under the condition of water immersion.The test results show that the natural water content of 11 # coal in a certain mine is 2.56％and the saturated water content is 10.18％.The uniaxial compressive strength and elastic modulus of coal are negatively correlated with the change of water content,and the maximum decreases are 46.85％and 20.38％,respectively.The dynamic compressive strength of coal decreases with the increase of water content and is positively correlated with the impact pressure.The fragmentation dimension of coal is positively corre-lated with water content and impact pressure.
Keywords：immersion effectSHPBuniaxial compressive strengthdynamic compressive strengthfragment dimension
Publication Date：2025-08-10
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 100-104,83 )