Mechanical Characteristics and Failure Mechanism of Siltstone with Different Joint Thickness

Table 1

Mechanical parameters of specimens under uniaxial compression.

Lithology	Sample	H (mm)	D (mm)	(MPa)	(10^−3)	E (GPa)
Siltstone	DFS-1	99.60	49.92	87.32	5.58	18.19	0.22
	DFS-2	99.42	49.90	79.11	5.70	15.52	0.26
	DFS-3	99.24	49.98	75.90	6.82	12.98	0.22
Jointed siltstone	DF5-1	100.36	49.90	44.19	7.60	7.04	0.29
	DF5-2	99.60	49.80	44.18	6.98	7.05	0.30
	DF5-3	98.96	49.72	42.74	6.22	7.67	0.24
	DF10-1	99.76	49.72	38.90	7.13	6.74	0.24
	DF10-2	99.86	49.80	40.91	8.02	5.97	0.18
	DF10-3	100.10	49.88	41.99	7.75	6.05	0.31
	DF15-1	100.02	50.02	29.85	10.75	3.78	0.24
	DF15-2	99.10	49.72	38.02	8.22	5.58	0.31
	DF15-3	98.96	49.96	34.38	7.47	5.05	0.26
	DF20-1	100.10	49.86	32.21	8.02	4.90	0.31
	DF20-2	96.80	49.62	29.27	7.60	4.59	0.36
	DF20-3	99.80	49.90	30.95	8.09	4.67	0.31
Coal	DFC-1	100.40	49.60	21.05	14.26	1.61	0.19
	DFC-2	99.20	50.10	24.24	15.97	1.77	0.21
	DFC-3	100.40	49.90	23.61	17.32	1.39	0.18