Abstract:

This article through the triaxial compression, shear, fracturing and hardness coefficient and determination of experiment, full understanding of shanxi coal mined here to DONGYI 9 # coal mechanics performance parameters; Through the triaxial compression experiment, get the measured cohesion of coal samples for C = 4.87 MPa, internal friction Angle for ; Through the shear experiment, get the measured cohesion of coal samples for , and internal friction Angle for ; The difference with the experiment results, because of coal samples bedding shear strength great influence, and for triaxial compression strength small effects. The maximum tensile strength of coal samples for 2.19 MPa, the minimum value is 0.74 MPa, the coefficient of variation was 0.293. Coal samples of the maximum pressure into the hardness of 613.06 MPa, the minimum value is 439.17 MPa, the coefficient of variation was 0.084. Plastic coefficient for a maximum of 3.00, the minimum value is 1.20, the variation coefficient is 0.26.Experimental results show that the coal strong level of medium strong ~ soft, rock Ⅴ ~ Ⅷ level. Through to the mechanical properties of coal quality experiment, for the mine coal mining machinery such as cut heart patient choice to provide the technical support and the scientific basis. Key words：mechanical properties, hardness coefficient, triaxial

Key words: mechanical properties, hardness coefficient, triaxial