Generation and analysis of stable excavation shapes under high rock stresses.

R. T. Ewy, John M Kemeny, Z. Zheng, N. G W Cook

Research output: Chapter in Book/Report/Conference proceedingChapter

17 Citations (Scopus)

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 pre-existing opening than for an opening made instantaneously in rock with pre-existing stress.-Authors

Original languageEnglish (US)
Title of host publicationProc. 6th congress International Society for Rock Mechanics, Montreal, 1987. Vol. 2
EditorsG. Herget, S. Vongpaisal
PublisherBalkema
Pages875-881
Number of pages7
StatePublished - 1987
Externally publishedYes

Fingerprint

excavation
rock
spalling
stress field
analysis
well
modeling

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Ewy, R. T., Kemeny, J. M., Zheng, Z., & Cook, N. G. W. (1987). Generation and analysis of stable excavation shapes under high rock stresses. In G. Herget, & S. Vongpaisal (Eds.), Proc. 6th congress International Society for Rock Mechanics, Montreal, 1987. Vol. 2 (pp. 875-881). Balkema.

Generation and analysis of stable excavation shapes under high rock stresses. / Ewy, R. T.; Kemeny, John M; Zheng, Z.; Cook, N. G W.

Proc. 6th congress International Society for Rock Mechanics, Montreal, 1987. Vol. 2. ed. / G. Herget; S. Vongpaisal. Balkema, 1987. p. 875-881.

Research output: Chapter in Book/Report/Conference proceedingChapter

Ewy, RT, Kemeny, JM, Zheng, Z & Cook, NGW 1987, Generation and analysis of stable excavation shapes under high rock stresses. in G Herget & S Vongpaisal (eds), Proc. 6th congress International Society for Rock Mechanics, Montreal, 1987. Vol. 2. Balkema, pp. 875-881.
Ewy RT, Kemeny JM, Zheng Z, Cook NGW. Generation and analysis of stable excavation shapes under high rock stresses. In Herget G, Vongpaisal S, editors, Proc. 6th congress International Society for Rock Mechanics, Montreal, 1987. Vol. 2. Balkema. 1987. p. 875-881
Ewy, R. T. ; Kemeny, John M ; Zheng, Z. ; Cook, N. G W. / Generation and analysis of stable excavation shapes under high rock stresses. Proc. 6th congress International Society for Rock Mechanics, Montreal, 1987. Vol. 2. editor / G. Herget ; S. Vongpaisal. Balkema, 1987. pp. 875-881
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