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Vol 185
Pages:
61-63
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RUS

Account of stress gradients in rock mass in designing of mining constructions

Authors:
S. V. Suknyov1
M. D. Novopashin2
About authors
  • 1 — Ph.D., Dr.Sci. Head of Laboratory Institute of Mining Art of the North, SO RAS
  • 2 — Ph.D., Dr.Sci. Professor Institute of Mining Art of the North, SO RAS
Date submitted:
2009-07-18
Date accepted:
2009-09-30
Date published:
2010-04-22

Abstract

Using the gradient approach the criteria of shear and tensile cracking are developed in compression under conditions of stress concentrations near mine workings. Considering the size effect, a function type of local strength is determined, expressions for critical pressure are derived and comparison between analytical and experimental data is performed.

Keywords:
displacement fractures rupture fractures ultimate state of stress scale effect function of local strength
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References

  1. Сукнёв С.В. Применение градиентного подхода для оценки прочности горных пород / С.В.Сукнёв, М.Д.Новопашин // ФТПРПИ. 1999. № 4. С.54-60.
  2. Сукнёв С.В. Определение локальных механических свойств материалов / С.В.Сукнёв, М.Д.Новопашин // ДАН. 2000. Т.373. № 1. С.48-50.
  3. Сукнёв С.В. Критерий образования трещин отрыва в горных породах при сжатии / С.В.Сукнёв, М.Д.Новопашин // ФТПРПИ. 2003. № 2. С.30-37.
  4. Nesetova V. Fracture from compressive stress concentrations around elastic flaws / V.Nesetova, E.Z.Lajtai // Int. J. Rock Mech. Min. Sci. & Geomech. Abstr. 1973. Vol.10. P.265-284.
  5. Carter B.J. Tensile fracture from circular cavities loaded in compression / B.J.Carter, E.Z.Lajtai, Y.Yuan // Int. J. Fract. 1992. Vol.57. № 3. P.221-236.

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