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Vol 239
Pages:
502-509
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RUS ENG
Research article
Mining

Estimation of Rock Mass Strength in Open-Pit Mining

Authors:
A. A. Pavlovich1
V. A. Korshunov2
A. A. Bazhukov3
N. Ya. Melnikov4
About authors
  • 1 — Ph.D. Head of Laboratory Saint-Petersburg Mining University
  • 2 — Ph.D. Leading Researcher Saint-Petersburg Mining University
  • 3 — Postgraduate Student Saint-Petersburg Mining University
  • 4 — Postgraduate Student Saint-Petersburg Mining University
Date submitted:
2019-04-27
Date accepted:
2019-07-10
Date published:
2019-10-23

Abstract

The paper presents results of an experimental study on strength characteristics of the rock mass as applied to the assessment of open-pit slope stability. Formulas have been obtained that describe a correlation between ultimate and residual strength of rock samples and residual shear strength along the weakening surface. A new method has been developed to calculate residual interface strength of the rock mass basing on data from the examination of small-scale monolith samples with opposing spherical indentors. A method has been proposed to estimate strength characteristics (structural weakening coefficients and internal friction angles) of the fractured near-slope rock mass. The method relies on test data from shattering small-scale monolith samples with spherical indentors, taking into ac- count contact conditions along the weakening surface, and can be applied in the field conditions. It is acceptable to use irregular-shaped samples in thetests.

Keywords:
open-pit slope stability near-slope rocks mass geomechanical model structural weakening coefficient laboratory tests strength certificate of rocks residual strength contact conditions
10.31897/pmi.2019.5.502
Go to volume 239

References

  1. Korshunov V.A., Petrov D.N., Yastrebova K.N. Calculation Method of Plotting Rock Mass Strength Certificate on the Results of Testing Samples with Spherical Indentors. Innovatsionnye napravleniya v proektirovanii gornodobyvayushchikh predpriyatii: geomekhanicheskoe obespechenie proektirovaniya i soprovozhdeniya gornykh rabot: Sbornik nauchnykh trudov. VIII Mezhdunarodnaya nauchno-prakticheskaya konferentsiya. Sankt-Peterburgskii Gornyi Universitet. St. Petersburg, 2017, p. 256-265 (in Russian).
  2. Methodical Guidelines on Estimation of Inclination Angles for Edges, High-Walls and Dump Slopes of Open-Pit Mines under Construction and Exploitation. VNIMI. Leningrad, 1972, p. 165 (in Russian).
  3. Regulations on Ensuring Slope Stability in the Open-Pit Coal Mines. VNIMI. St. Petersburg, 1998, p. 208 (in Russian).
  4. Protosenya A.G., Verbilo P.E Estimation of Scale Effect in Strength Characteristics of the Fractured Rock Mass. Izvestiya TulGU. Nauki o Zemle. 2016. Iss. 1, p. 167-176 (in Russian).
  5. Fisenko G.L. Slope Stability of Open-Pit Mines and Dumps. Мoscow: Nedra,1965, p. 373 (in Russian).
  6. Barton N. A relationship between joint roughness and joint shear strength. Rock fracture: In Proceedings of International Symposium on Rock Fracture. Nancy. 1971, p. 1-8.
  7. Bandis S., Lumsden A., Barton N. Experimental studies on scale effects on the shear behaviour of rock joints. International Journal of Rock Mechanics and Mining Science and Geomechanics. 1981, p. 1-21.
  8. Barton N. Shear strength investigations for surface mining. In Stability in Surface Mining: Proceedings of 3rd International Conference. Vancouver, British Columbia. 1982, p. 171-196.
  9. Pavlovich A.A., Korshunov V.A., Tsirel S.V., Melnikov N.Ya., Bazhukov A.A. Geomechanical substantiation of calculate indentors of the rock mass strength for slopes stability analysis of open pit. Geomechanics and Geodynamics of Rock Masses: Proceedings of the European Rock Mechanics Symposium (Eurock 2018, Saint-Petersburg, Russia, 22-26 May 2018). London: Taylor and Francis Group. UK. 2018. Vol. 2, p. 1053-1058.
  10. Hoek E., Caranza-Torres C., Corcum B. Hoek – Brown failure criterion. Proceedings of the North American Rock Me- chanics Society: Mining Innovation and Technology. Toronto. 2002, p. 267-273.
  11. Korshunov V.A., Solomoichenko D.A., Bazhukov A.A. Strength estimation of fractured rock using compression a speci- men with spherical indenters. Geomechanics and Geodynamics of Rock Masses: Proceedings of the European Rock Mechanics Symposium (Eurock 2018, Saint-Petersburg, Russia, 22-26 May 2018). London: Taylor and Francis Group. UK. 2018. Vol. 1, p. 299-305.
  12. Litvinenko V. Preface. Geomechanics and Geodynamics of Rock Masses // International European Rock Mechanics Symposium (Eurock 2018, Saint-Petersburg, Russia, 22-26 May 2018). London: Taylor and Francis Group. UK. 2018. Vol. 1, p. 9-15.
  13. Litvinenko V. Advancement of geomechanics and geodynamics at the mineral ore mining and underground space development // Geomechanics and Geodynamics of Rock Masses: Proceedings of the European Rock Mechanics Symposium (Eurock 2018, Saint-Petersburg, Russia, 22-26 May 2018). London: Taylor and Francis Group. UK. 2018. Vol. 1, p. 3-16.
  14. Muller L. Rock mass behavior – determination and application in engineering practice // Proceed. 3rd Congr. Int. Soc. Rock Mech. 1974. Vol. 1A, p. 205-215.
  15. Yang Jian Ping, Chen Wei Zhong, Yang Dian Sen, Yuan Jing Qiang. Numerical determination of strength and deformability of fractured rock mass by FEM modeling. Computers and Geotechnics. 2015. Vol. 64, p. 20-31.
  16. Schlotfeldt P., Elmo D., Panton B. Overhanging rock slope by design: An integrated approach using rock mass strength characterization, large-scale numerical modelling and limit equilibrium methods. Journal of Rock Mechanics and Geotechnical Engineering. 2018. N 10, p. 72-90.

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