Benching Slope Stability

For multiple bench systems in TYPE A soil and trench depth of less than 20 feet the steepest maximum allowable slope is 53 degrees from the horizontal. Clay soil types you described may be subject to instability if it has a substantial amount of moisture.

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It is the one area of the slope where the mining practices exert a large degree of control over slope stability.

Benching slope stability. We the slopes and soil. As Willy said soil moisture saturation will play a factor in the slope stability. This translates to a 075H.

1V incline and is shown below. The local stability of the benches is largely a construction issue. The stability condition is created contemporaneously with the mining as the equipment digs toward the final slope limits.

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