Effect of Joint Roughness and Infill Thickness on Shear Characteristics of Rock Mass

Table 4

Relationship between peak shear stress and coupling of joint roughness and infill thickness for bolted infilled rock joints.

Infill thickness	JRC			Change multiple (from 6–8 to 18–20)
	6–8	12–14	18–20
2.1 mm	9.39 MPa	10.75 MPa	13.67 MPa	1.45
2.6 mm	8.50 MPa	9.57 MPa	11.02 MPa	1.30
3.1 mm	7.69 MPa	8.44 MPa	9.61 MPa	1.25
Change multiple (from 3.1 mm to 2.1 mm)	1.22	1.27	1.42	—