Experimental Investigation on the Deformation, Strength, and Acoustic Emission Characteristics of Sandstone under True Triaxial Compression

Table 1

Tested sandstone specimens and conditions in this research.

Loading program	Group	Specimen number	Dimensions (mm)	Quality (g)	(MPa)	(MPa)
CTT	C1	C1-1	100.2 × 50.0 × 49.8	622.5	10	10
		C1-2	100.2 × 49.8 × 50.1	613.2
		C1-3	100.3 × 50.1 × 49.9	612.9
	C2	C2-1	100.0 × 49.5 × 50.0	613.0	20	20
		C2-2	100.5 × 49.5 × 50.0	613.5
		C2-3	99.8 × 50.3 × 50.3	605.1
	C3	C3-1	100.3 × 50.0 × 50.1	636.0	30	30
		C3-2	99.9 × 50.1 × 50.2	633.9
		C3-3	99.6 × 50.3 × 49.6	602.3
	C4	C4-1	99.9 × 50.1 × 50.2	625.3	40	40
		C4-2	99.8 × 50.2 × 50.1	629.5
		C4-3	100.2 × 50.0 × 49.2	639.7
TTT ()	T2	T2-1	100.1 × 50.3 × 49.8	628.1	20	10
		T2-2	100.4 × 50.5 × 50.1	636.0
		T2-3	100.3 × 50.6 × 50.1	646.6
	T3	T3-1	100.4 × 49.9 × 50.3	630.5	30	10
		T3-2	100.0 × 50.2 × 50.1	650.0
		T3-3	99.8 × 50.4 × 50.5	624.7
	T4	T4-1	100.4 × 49.6 × 49.6	618.8	40	10
		T4-2	100.3 × 49.7 × 49.9	626.7
		T4-3	100.1 × 50.4 × 50.6	607.1
	T5	T5-1	100.1 × 50.1 × 49.9	615.6	50	10
		T5-2	99.9 × 49.5 × 50.2	610.8
		T5-3	100.2 × 50.1 × 49.9	614.5
	T6	T6-1	99.7 × 49.7 × 50.3	610.4	60	10
		T6-2	99.8 × 49.9 × 50.2	606.3
		T6-3	100.1 × 49.8 × 50.2	595.7
TTT ()	T7	T7-1	100.3 × 49.9 × 50.2	630.5	30	20
		T7-2	99.8 × 50.4 × 50.5	624.2
		T7-3	99.9 × 49.5 × 50.2	612.3
	T8	T8-1	100.4 × 49.8 × 50.2	599.8	40	20
		T8-2	100.1 × 50.4 × 50.3	603.1
		T8-3	99.7 × 50.1 × 50.3	615.4
	T9	T9-1	100.3 × 49.7 × 49.9	621.7	50	20
		T9-2	100.1 × 50.1 × 49.9	615.6
		T9-3	100.0 × 49.7 × 50.1	630.1
	T10	T10-1	99.8 × 49.9 × 50.4	626.3	60	20
		T10-2	100.2 × 50.1 × 49.9	624.6
		T10-3	100.3 × 49.8 × 49.9	621.7