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

Table 1

Mechanical parameters of composite specimens with different dip angles.

	Uniaxial compressive strength σu (MPa)		Elastic modulus E (GPa)		Bursting energy index Ke
Specimen group	Tested	Average	Tested	Average	Tested	Average
A10-1	14.236	13.726	1.172	1.206	7.059	7.694
A10-2	13.254		1.252		6.896
A10-3	13.689		1.193		9.126
A20-1	12.240	11.449	1.064	1.077	6.870	6.618
A20-2	11.123		1.143		7.569
A20-3	10.985		1.025		5.415
A30-1	10.234	9.404	0.942	1.003	4.325	5.384
A30-2	9.853		1.073		5.698
A30-3	8.126		0.995		6.129
A40-1	5.756	5.775	0.899	0.831	6.125	4.799
A40-2	6.443		0.792		4.365
A40-3	5.125		0.802		3.906