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Triaxial stress state of cylindrical openings for rocks modeled by elastoplasticity and strength criterion |
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| Authors: | X.P. Zhou X.R. Bao Q. Xie |
| Affiliation: | a School of Civil Engineering, Chongqing University, Chongqing 400045, PR China b Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Ministry of Education, Chongqing 400045, PR China c Department of Civil Engineering and Mechanics, Xi’an Jiaotong University, Xi’an 710049, PR China d Geotechnical Center, IST, Technical University of Lisbon, Lisbon 1049-001, Portugal |
| Abstract: | An analytical solution for calculating the triaxial stress state around a cylindrical opening in an elastoplastic cohesive medium is developed. Magnitude of the slip zones around a cylindrical opening in crack-weakened rock masses is considered by modifying the existing strength criterion for rocks of different types. The disturbance coefficient, the geological strength index and the other strength parameters are also investigated. |
| Keywords: | Modified strength criterion Triaxial stress state Slip zones Circular underground openings |
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