Abstract
Failure criteria based on micromechanical models of splitting failure and shear failure are implemented in boundary element programs to analyze the stability of various two-dimensional excavation shapes under high stress. A technique for modelling the failure processes of progressive spalling, shear, and tensile failure is developed and is used to simulate the formation of stable shapes through progressive failure. The shapes resulting from initially circular openings are strikingly similar to those recognized widely as well-bore breakouts. All the shapes studied lead to the formation of Pointed breakout regions, and these final shapes are stable with respect to splitting, shear, and tensile failure. The size of the failed region is smaller for the case of gradually increasing field stress around a preexisting opening than for an opening made instantaneously in rock with preexisting stress.
| Original language | English (US) |
|---|---|
| Pages | 981-985 |
| Number of pages | 5 |
| State | Published - Jan 1 1987 |
| Externally published | Yes |
| Event | 6th International Society for Rock Mechanics and Rock Engineering Congress, ISRM 1987 - Montreal, Canada Duration: Aug 30 1987 → Sep 3 1987 |
Other
| Other | 6th International Society for Rock Mechanics and Rock Engineering Congress, ISRM 1987 |
|---|---|
| Country | Canada |
| City | Montreal |
| Period | 8/30/87 → 9/3/87 |
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ASJC Scopus subject areas
- Geophysics
- Geochemistry and Petrology
Cite this
Generation and analysis of stable excavation shapes under high rock stresses. / Ewy, Russell T.; Kemeny, John M; Zheng, Ziqiong; Cook, Neville G.W.
1987. 981-985 Paper presented at 6th International Society for Rock Mechanics and Rock Engineering Congress, ISRM 1987, Montreal, Canada.Research output: Contribution to conference › Paper
}
TY - CONF
T1 - Generation and analysis of stable excavation shapes under high rock stresses
AU - Ewy, Russell T.
AU - Kemeny, John M
AU - Zheng, Ziqiong
AU - Cook, Neville G.W.
PY - 1987/1/1
Y1 - 1987/1/1
N2 - Failure criteria based on micromechanical models of splitting failure and shear failure are implemented in boundary element programs to analyze the stability of various two-dimensional excavation shapes under high stress. A technique for modelling the failure processes of progressive spalling, shear, and tensile failure is developed and is used to simulate the formation of stable shapes through progressive failure. The shapes resulting from initially circular openings are strikingly similar to those recognized widely as well-bore breakouts. All the shapes studied lead to the formation of Pointed breakout regions, and these final shapes are stable with respect to splitting, shear, and tensile failure. The size of the failed region is smaller for the case of gradually increasing field stress around a preexisting opening than for an opening made instantaneously in rock with preexisting stress.
AB - Failure criteria based on micromechanical models of splitting failure and shear failure are implemented in boundary element programs to analyze the stability of various two-dimensional excavation shapes under high stress. A technique for modelling the failure processes of progressive spalling, shear, and tensile failure is developed and is used to simulate the formation of stable shapes through progressive failure. The shapes resulting from initially circular openings are strikingly similar to those recognized widely as well-bore breakouts. All the shapes studied lead to the formation of Pointed breakout regions, and these final shapes are stable with respect to splitting, shear, and tensile failure. The size of the failed region is smaller for the case of gradually increasing field stress around a preexisting opening than for an opening made instantaneously in rock with preexisting stress.
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M3 - Paper
AN - SCOPUS:85056142314
SP - 981
EP - 985
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