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Types of slope failure

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Plane failure Typical view of Plane failure

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Plane failure with condition of failures

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The dip direction of the planar discontinuity must be within ( ±20 o ) of the dip direction of the slope face The dip of the planar discontinuity must be less than the dip of the slope face (Daylight) The dip of the planar discontinuity must be greater than the angle of friction of the surface.

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Wedge Failure: wedge failure with dip and dip direction.

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Wedge Failure: The necessary structural conditions for this failure are summarized as follows: The trend of the line of intersection must approximate the dip direction of the slope face. The plunge of the line of intersection must be less than the dip of the slope face. The line of intersection under this condition is said to daylight on the slope. The plunge of the line of intersection must be greater than the angle of friction of the surface

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Occurance of Wedge failure in a slope

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Toppling failure view of Toppling failure

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Flexural toppling block toppling of columns of rock containing widely spaced orthogonal joints(a); flexural toppling of slabs of rock dipping steeply into face (b)

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Rockfalls Typical view of Rock fall

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Rotational Failure Typical view of Non Circular failure Typical view of Circular failure

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