The experimental models are made from plaster of Paris. There are eight sets of models with sizes of (25 × 15 × 15) × 2 cm3. The up-slipping angles chosen for every model are 0°, 4°, 9°, 13°, 19°, 22.5°, 28°, 38° respectively, while the depression angles 0°, 15°, 45°, 40°, 18°, 20,° 34°, 15°.The model material (Rc) has a uniaxial compressive strength of 42kg/cm2, shear strength of φb = 45° and Cb = 6 kg/cm2, an elasticity constant (E) of 1.7× 104 kg/ cm2, and Poisson’s ratio of 0.225. According to the shear tests of serrate structure surface and the theoretical study, the following conclusions can be obtained :1. There are three types of shear resistance-displacement curves in the shear of serrate structure surface: (1) the curve of snip-off; (2) the curve both of up-slip and of snip-off after up-slipping; (3) the curve of up-slip.2. There are three failure mechanisms in shearing of serrate structure surface: (1) the up-slipping failure; (2) the snip-off failure after up-slipping; (3) the snip-off failure without up-slipping.3. The whole process of shearing from beginning of shear deformation to yielding residual strength has gone through three stages: (1) the shear deformation stage; (2) the shear fracture stage and (3) the stage of transformation of shear zone.4. The shear tests of serrate structure surface show that the frictional angle of serrate structure surface may be considered as φa = φj + a, where φj is frictional angle of straight structure surface, and a is up-slipping angle.5. The normal stress of critical snip-off (zzm) on experiments is in coincidence with the results of theoretical analysis. Thus,zzm=(Cb - Cj[ since (ctgα + ctgβ) (cosα -sinαtgφj)]-1)/(tg(φj+2)-tgφb)can be used as a criterion to correct the up-slipping angle in analysing the mechanical action on serrate structure surface. In the formula β is the depression angle, φb and Cb are parameters of shear strength of rock block.
. 1979, 锯齿状结构面力学效应实验研究. 地质科学, 14(2): 157-166.
. EXPERIMENTAL STUDY ON MECHANICAL PROPERTIES OF SERRATE STRUCTURE SURFACE[J]. Chinese Journal of Geology, 1979, 14(2): 157-166.