With reference to Problem 4.32, develop an approximately equivalent bolting reinforcement system using one-inch diameter, Grade 60

Question:

With reference to Problem 4.32, develop an approximately equivalent bolting reinforcement system using one-inch diameter, Grade 60 steel (410 MPa elastic limit) bolts. Rock properties are: E =33.8GPa, v = 0.18, Co = 51.7 MPa, To = 5.17Mpa, γ = 23.4kN/m3. Specify bolt spacing’s (in-row, between rows, m) and bolt lengths (m).