Experimental Research on the Mechanical Characteristics and the Failure Mechanism of Coal-Rock Composite under Uniaxial Load

Table 2

Physical and mechanical parameters of the combined sample.

Category	Sample number	Size (mm)	Poisson’s ratio	Compressive strength (MPa)	Elastic modulus (GPa)
Composite samples	C-1	50 × 99.90	0.24	34.67	4.86
	C-2	50 × 100.27	0.24	33.70	4.34
	C-3	50 × 99.64	0.26	36.33	4.66
	D-1	50 × 100.24	0.26	27.87	3.52
	D-2	50 × 99.84	0.26	28.48	3.69
	D-3	50 × 101.16	0.27	31.37	3.65
	E-1	50 × 99.08	0.27	22.04	2.58
	E-2	50 × 99.68	0.28	22.28	3.88
	E-3	50 × 100.18	0.28	18.54	2.30