Geomechanics and Ground Control · Geomechanics · 2 marks · Numerical answer
A pit has5 benches,each8 m high with70° face angle. One bench width is24 m and the other four widths10 m. Find overall slope angle in degrees to two decimals.
Total height is40 m. Total horizontal face projection is40cot70°≈14.56 m. Using the stated five widths, berm contribution is24+4×10=64 m. Overall angle is arctan[40/(64+14.56)]≈26.98°. The broad official range also accommodates alternative conventions about the top/bottom berms.
More Geomechanics questions
GATE 2025 MN Q51– Subsidence is s=(S max/2)[1.002-(4.8x/H)]. Here x is measured from the inflection…
GATE 2024 MN Q22– For major/minor principal stresses σ₁ and σ₃=−σ₁/2, find maximum shear stress.
GATE 2024 MN Q31– A 1000 m³ unconsolidated soil heap has void ratio 1.0. It consolidates to 800 m³ with…
GATE 2024 MN Q33– The 2 m scanline AB crosses the discontinuities shown. With RQD=100(0.1+1)e-0.1 and λ the…
GATE 2024 MN Q54– A rock obeys Mohr–Coulomb τ=7.5+0.84σn in MPa. In triaxial failure with confinement 5 MPa,…
GATE 2024 MN Q55– A circular tunnel is 100 m deep under rock of unit weight 27 kN/m³. Tangential stress at…