A Study of Acoustic Emission and Damage Evolution of Limestone under Different Stress Paths and Confining Pressures

Table 3

The mechanics and damage characteristic values of each scheme.

	Specimen number	Confining stress (MPa)	Peak strength (MPa)	Residual strength (MPa)	Damage variable
Scheme 1	A1	5	74.63	21.11	0.712
	A6	10	123.29	70.55	0.419
	B4	20	196.38	137.66	0.298
Scheme 2	B1	5	60.10	15.64	0.740
	B7	10	110.46	56.08	0.492
	C6	20	143.01	66.63	0.534
Scheme 3	A7	5	56.54	29.55	0.477
	C1	10	87.59	39.46	0.545
	C5	20	123.92	55.24	0.552