Research on Structural Characteristics of Dynamic Nuclear Zone in Dynamic System of Coal and Rock

Table 2

Physical and mechanical indexes of coal seam on panel 8939.

Lithology	Uniaxial tensile strength (MPa)	Uniaxial compressive strength (MPa)	Hardness	Modulus of elasticity (GPa)	Poisson ratio	Internal friction angle (°)	Cohesive force (MPa)
Coal	1.34	32.27	3.23	3.66	0.20	29.89	3.67