Rock strength anisotropy in high stress conditions: a case study for application to shaft stability assessments

• Autorzy: Watson J. M. , Vakili M. , Jakubowski M.

Identyfikatory

DOI

10.1515/sgem-2015-0013

• Języki publikacji: EN

Abstrakty

EN

Although rock strength anisotropy is a well-known phenomenon in rock mechanics, its impact on geotechnical design is often ignored or underestimated. This paper explores the concept of anisotropy in a high stress environment using an improved unified constitutive model (IUCM), which can account for more complex failure mechanisms. The IUCM is used to better understand the typical responses of anisotropic rocks to underground mining. This study applies the IUCM to a proposed rock shaft located in high stress/anisotropic conditions. Results suggest that the effect of rock strength anisotropy must be taken into consideration when assessing the rock mass response to mining in high stress and anisotropic rock conditions.

Słowa kluczowe

EN

anisotropy; high stress; numerical modelling; constitutive model

• Wydawca: De Gruyter
• Czasopismo: Studia Geotechnica et Mechanica
• Rocznik: 2015
• Tom: Vol. 37, nr 1
• Strony: 115--125
• Opis fizyczny: Bibliogr. 26 poz., tab., rys.

Twórcy

autor

Watson J. M.

• Geotechnical Engineering & Hydrogeology, KGHM International, Ltd., Suite 202 – 8105 Birch Bay Square St, Blaine, WA, USA 98230

autor

Vakili M.

• Mining One Pty, Ltd., Level 9, 50 Market Street, Melbourne, VIC, Australia 3000

autor

Jakubowski M.

• Business Development Department, KGHM Polska Miedź S.A., ul. Marii Sklodowskiej-Curie 48, 59-301 Lubin, Poland

Bibliografia

• [1] BARTON N., Shear strength criteria for rock, rock joints, rockfill and rock masses: Problems and some solutions, Journal of Rock Mechanics and Geotechnical Engineering, 2013, 5(4), 249–261, DOI: 10.1016/j.jrmge.2013.05.008.
• [2] BARTON N., PANDEY S.K., Numerical modelling of two stoping methods in two Indian mines using degradation of c and mobilization of φ based on Q-parameters, International Journal of Rock Mechanics and Mining Sciences, 2011, 48(7), 1095–1112, DOI: 10.1016/j.ijrmms.2011.07.002.
• [3] BAHRANI N., VALLEY B., KAISER P.K., Discrete element modeling of drilling-induced core damage and its influence on laboratory properties of Lac De Bonnet granite, Proc. 45th US Rock Mechanics Conference, 26–29 June 2011, pp. 9, San Francisco, USA.
• [4] BROWN E.T., Estimating the mechanical properties of rock masses, Proceedings First Southern Hemisphere International Rock Mechanics Symposium, 16–19 September 2008, pp. 3–22, Perth, WA, Australia: The Australian Centre for Geomechanics.
• [5] CARRANZA-TORRES C., DIEDERICHS M.S., Mechanical analysis of a circular liner with particular reference to composite supports – For example liners consisting of shotcrete and steel sets, Tunnelling and Underground Space Technology, 2009, 24(5), 506–532, DOI:10.1016/j.tust.2009.02.001.
• [6] DIEDERICHS M.S., Instability of hard rockmasses: the role of tensile damage and relaxation, Unpublished doctoral dissertation, Department of Civil Engineering, University of Waterloo, Waterloo, Canada, 1999.
• [7] DIEDERICHS M.S., KAISER P.K., EBERHARDT E., Damage initiation and propagation in hard rock during tunnelling and the influence of near-face stress rotation, International Journal of Rock Mechanics and Mining Sciences, 2004, 41(5), 785–812, DOI: 10.1016/j.ijrmms.2004.02.003.
• [8] HADJIGEORGIOU J., KARAMPINOS E., TURCOTE P., MERCIER- -LANGEVIN F., Assessment of the influence of drift orientation on observed levels of squeezing in hard rock mines, Seventh International Symposium on Ground Support in Mining and Underground Construction, 13–15 May 2013, pp. 109–117, Perth, WA, Australia, Australian Centre for Geomechanics.
• [9] HAJIABDOLMAJID V., KAISER P.K., MARTIN C.D., Modelling brittle failure of rock, International Journal of Rock Mechanics and Mining Sciences, 2002, 39(6), 731–741, DOI: 10.1016/S1365-1609(02)00051-5.
• [10] HOEK E., CARTER T.G., DIEDERICHS M.S., Quantification of the geological strength index chart, 47th US Rock Mechanics/ Geomechanics Symposium, 23–26 June 2013, San Francisco, California, USA.
• [11] HOEK E., CARRANZA-TORRES C., DIEDERICHS M.S., CORKUM B., Integration of geotechnical and structural design in tunnelling, Proceedings University of Minnesota 56th Annual Geotechnical Engineering Conference, 29 February 2008, pp. 1–53, Minneapolis, Minnesota, USA.
• [12] HOEK E., CARRANZA-TORRES C.T., CORKUM B., Hoek– Brown failure criterion – 2002 edition, Proceedings of the Fifth North American Rock Mechanics Symposium (NARMS-TAC), 7–10 July 2002, pp. 267–273, Toronto, Ontario, Canada.
• [13] ITASCA Consulting Group, Inc. (2012) FLAC3D – Fast Lagrangian Analysis of Continua in Three-Dimensions, Ver. 5.0. Minneapolis, Minnesota, USA.
• [14] KAISER P.K., DIEDERICHS M.S., MARTIN C.D., SHARP J., STEINER W., Underground works in hard rock tunneling and mining. Keynote lecture, Geo-Eng 2000 International Conference on Geotechnical and Geological Engineering, 19–24 November 2000, pp. 841–926, Melbourne, Victoria, Australia.
• [15] KAISER P.K., KIM B., Rock mechanics advances of underground construction and mining. Keynote lecture, Proceedings Korean Rock Mechanics, Symposium, October 2008, pp. 1–16, Seoul, South Korea: Korean Society for Rock Mechanics.
• [16] LORIG L.J., VARONA P., Guidelines for numerical modelling of rock support for mines. Keynote lecture, Seventh International Symposium on Ground Support in Mining and Underground Construction, 13–15 May 2013, pp. 81–105, Perth, Western Australia, Australia: Australian Centre for Geomechanics.
• [17] MARTIN C.D., KAISER P.K., MCCREATH D.R., Hoek–Brown parameters for predicting the depth of brittle failure around tunnels, Canadian Geotechnical Journal, 1999, 36(1), 136–151, DOI: 10.1139/cgj-36-1-136.
• [18] MARTIN C.D., Seventeenth Canadian geotechnical colloquium: the effect of cohesion loss and stress path on brittle rock strength, Canadian Geotechnical Journal, 1997, 34(5), 698–725, DOI: 10.1139/cgj-34-5-698.
• [19] REYES-MONTES M., SAINSBURY B., ANDREWS J.R., YOUNG R.P., Application of cave-scale rock degradation models in the imaging of the seismogenic zone, Proceedings Sixth International, Conference and Exhibition on Mass Mining, Massmin 2012, 10–14 June 2012, pp. 3–22, Sudbury, Ontario, Canada.
• [20] SANDY M., SHARROCK G., ALBRECHT J., VAKILI A., Managing the transition from low-stress to high-stress conditions, Proceedings Second Australasian Ground Control in Mining Conference, 23–24 November 2010, pp. 247–254, Sydney, New South Wales, Australia, The Australasian Institute of Mining and Metallurgy.
• [21] TRIFU C., SUORINENI F., Use of microseismic monitoring for rockburst management at Vale Inco mines, [in:] C. Tang (Ed.), Controlling Seismic Hazard and Sustainable Development of Deep Mines, Rinton Press, New York 2009, 1105–1114.
• [22] VAKILI A., An improved unified constitutive model for rock material and a guideline for its application in numerical modelling, (Unpublished paper – currently under completion), 2015.
• [23] VAKILI A., ALBRECHT J., SANDY M., Rock strength anisotropy and its importance in underground geotechnical design, Proceedings AusRock 2014, Second Australasian Ground Control in Mining Conference, 5–6 November 2010, pp. 167–180, Sydney, New South Wales, Australia, The Australasian Institute of Mining and Metallurgy 2014.
• [24] VAKILI A., SANDY M., MATHEWS M., RODDA B., Ground support under highly stressed conditions, Proceedings Seventh International Symposium on Ground Support in Mining and Underground Construction, 13–15 May 2013, pp. 551– 564, Perth, Western Australia, Australia, Australian Centre for Geomechanics.
• [25] VAKILI A., SANDY M., ALBRECHT J., Interpretation of nonlinear numerical models in geomechanics – a case study in the application of numerical modelling for raise bored shaft design in a highly stressed and foliated rock mass, Proceedings sixth International Conference and Exhibition on Mass Mining, Massmin 2012, 10–14 June 2012, Sudbury, Ontario, Canada, The Canadian Institute of Mining, Metallurgy and Petroleum.
• [26] ZHAO X.G., CAI M., A mobilized dilation angle model for rocks, International Journal of Rock Mechanics and Mining Sciences, 2010, 47(3), 368–384, DOI: 10.1016/j.ijrmms.2009.12.007.