(Solved): An iafinite stope is shown in the figure. The stear strength parameters at the interface of soil an ...

An iafinite stope is shown in the figure. The stear strength parameters at the interface of soil and rock are as follows: \( c^{\circ}=18 \mathrm{kN} / \mathrm{m}^{2} \) and \( \phi^{\prime}=25^{\circ} \), Consider that there is co. seeospe thesugh the said. a) If \( \mathrm{H}=8 \mathrm{~m} \) and \( \mathrm{B}=20 \), find the FoS against siding on the fock surface. b) if \( \beta=30 \), find the hoight, \( H \) for which the FoS \( =1 \).