Plastic Failure Analysis of Roadway Floor Surrounding Rocks Based on Unified Strength Theory

Figure 3

The three-dimensional stress states and change rules of the stress distribution in the surrounding rock plastic zone and plastic zone boundary with the increase of α. (a) Three-dimensional stress state change, (b) plastic failure zone distribution changes, (c) plastic failure zone boundary radial stress distribution change, (d) plastic failure zone boundary tangential stress distribution change.

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(b)

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