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  2. Vol 3, No 2 (2018)
  3. Septian

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Abstract


mining area. Planning of the slope geometry will be used by Bishop Simplified and Hoek and Bray methods.
Initial data Clay: Unit Wight (γ) = 19.67 kN / m3, Cohesion (c ') = 32.17 kN/ m2 and internal angle (φ') = 39.11 °. The initial slope height is 14.543 meters and overall angle of the slope is 51 °.
Geometry of slope recommendation: 1. Bishop Simplified method of saturated condition FK 0.984 witch mean slope is insecurity, reduction of slope angle from 51 ° to 42 °, FK 1,324 slope in safe state. 2. Method Hoek and Bray saturated conditions FK 1.25 Unsafe slope, slope angle from 51 ° to 42 °, then FK 1.41 slope in safe condition.


Keywords: initial geometry, bishop simplified, hoek and bray, security factor