A Study on the Mechanical Properties and Bursting Liability of Coal-Rock Composites with Seam Partings

Table 2

Mechanical parameters of composite specimens with different thicknesses.

	Uniaxial compressive strength σu (MPa)		Elastic modulus E (GPa)		Bursting energy index Ke
Specimen group	Tested	Average	Tested	Average	Tested	Average
B10-1	12.148	12.662	1.167	1.286	2.968	3.131
B10-2	12.685		1.325		3.556
B10-3	13.154		1.367		2.869
B20-1	13.644	14.382	1.325	1.422	9.091	8.597
B20-2	14.851		1.485		8.873
B20-3	14.652		1.456		7.826
B30-1	15.936	15.779	1.513	1.583	13.521	9.236
B30-2	14.543		1.583		0.371
B30-3	16.859		1.653		13.815
B40-1	20.237	19.906	1.782	1.818	14.071	14.455
B40-2	20.125		1.856		15.026
B40-3	19.356		1.815		14.269