The Effect of Bedding Structure on Mechanical Property of Coal

Table 1

Basic information and main results of coal specimens.

Specimen number	Diameter (mm)	Length (mm)	Density (g/cm^3)	Peak stress (MPa)	Strain corresponding to peak stress (%)			Young’s Modulus (GPa)	Poisson’s ratio	Specimen type
					Axial strain	Circumferential strain	Volumetric strain
M3-1	47.67	99.41	1.35	6.32	0.398	−0.575	−0.752	1.659	0.052	Parallel specimen
M3-2	47.67	99.69	1.33	5.40	0.412	−1.343	−2.275	1.379	0.356
M3-3	47.72	99.55	1.37	6.95	0.272	−0.696	−1.119	2.749	0.112
M3-8	47.60	101.81	1.31	5.85	0.206	−0.886	−1.566	1.568	0.375
M3-10	47.72	101.72	1.31	10.24	0.472	−1.180	−1.888	5.192	0.441
Average	47.68	100.44	1.34	6.95	0.352	−0.936	−1.520	2.509	0.267
M6-5	47.68	99.18	1.37	23.21	0.553	−0.189	0.174	4.105	0.305	Perpendicular specimen
M6-6	47.70	99.07	1.36	21.65	0.566	−0.163	0.240	4.340	0.268
M6-7	47.73	100.62	1.37	16.73	0.537	−0.429	−0.321	3.318	0.289
M6-9	47.70	100.75	1.36	26.03	0.628	−0.190	0.248	4.358	0.246
M6-11	47.71	100.71	1.36	12.37	0.739	−0.085	0.568	1.968	0.114
Average	47.70	100.07	1.36	20.00	0.604	−0.211	0.182	3.618	0.244