Fig 1.
Filled nodes and filling degree(t/d) diagram.
Fig 2.
Specimen production process (a) select JRC curves, (b) Print molds, (c) Pouring specimens, (d) Filling grouting.
Fig 3.
Experimental systems and AE systems.
Table 1.
Mechanical parameters of rock sample materials and filling materials.
Fig 4.
Stress-strain curves of different JRC joint specimens with a filling degree of 1 (a) JRC = 10.8, (b) JRC = 18.7.
Table 2.
Peak shear peak at different factors.
Fig 5.
Variation of peak shear strength with normal stress (a) t/d = 0.5, (b) t/d = 1, (c) t/d = 1.5.
Fig 6.
Shear failure mode of filled joints (a) damage to the adhesive surface of the nodal filler, (b) damage to the adhesive surface of the nodal filler and (c) severe damage to joints and filling material.
Fig 7.
Damage evolution characteristics of AE events (a) Normal stress 2MPa, (b) Normal stress 5MPa, (c) JRC = 2.8, (d) JRC = 10.8, (e) t/d = 0.5, (f) t/d = 1.
Fig 8.
Diagram of the evolution of AE events (a) JRC = 10.8, t/d = 1, (b) JRC = 2.8, t/d = 1, (c) JRC = 18.7, t/d = 0.5.
Fig 9.
AE energy rate and cumulative energy (a) normal stress 2MPa, (b) normal stress 4MPa, (c) normal stress 6MPa.