# Geostudio 2012 UPDATED Full Crack 19

A cracked earthen dam with hydraulic fracturing can be detected through the analysis of Seep/W or Sigma/W, as a result of a numerical simulation. Figure 2 depicts the stresses on the earthen dam, which is in a state of steady-state of seepage before the start of reservoir operation. The major (minor) principal stresses are 3 (1) prior to the reservoir operation. Because of the minor principal stresses and a condition of steady-state of seepage, the state of steady-state of seepage has a new minor principal stress, but with the same magnitude as before the reservoir operation as follows: Figure 2: Stress Analysis for Steady-State Conditions of Seepage, Before Reservoir Operation (before the start of reservoir operation) Geostudio 2012 Full Crack 19 Figure 2 shows that the principal stresses before the reservoir operation is 3, in this case, the tensile stresses develop on the upstream face of the earthen dam. This is the beginning of a newly developed crack on the upstream face of the earthen dam. This tensile stress is generated as follows.

## Geostudio 2012 Full Crack 19

Because of the reservoir operations, the 1 and 3 principal stresses are changed as follows, with minor and major principal stresses of 13.03 and 3.73 before reservoir operation 1 (1.0 N/mm2) and 3 ( 3.73 N/mm2) and 4.7 (2.1 N/mm2) and 14.3 (2.5 N/mm2) after reservoir operation. The beginning of the crack on the upstream face is accelerated due to the decreasing of the 1 and 3 principal stresses.

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