Strength Characteristics of Nonpenetrating Joint Rock Mass under Different Shear Conditions

Table 2

Summary of specimen numbers.

State during direct shear test	Test piece number
Damage degree	Normal stress (MPa)
Point B	0.5	B1-1-1	B1-2-3	B1-3-5
	1.5	B2-1-2	B2-2-4	B2-3-6
Point C	0.5	C1-1-1	C1-2-2	C1-3-3	C1-4-4	C1-5-5
	1.5	C2-1-1	C2-2-2	C2-3-3	C2-4-4	C2-5-5

Note. The last digit of the specimen number indicates the size of the confining pressure applied during the triaxial test.