Rock Mass rating

Seria I: Studenci IV-go roku GÓRNICTWO I GEOLOGIA Akademia Górniczo - Hutnicza

Prof. Zdzisław Bieniawski Bieniawski Design Enterprises, USA

Kraków 23. X. 2010

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Wprowadzenie

Dane geotechniczne niezbędne do projektowania

Podsumowanie najważniejszych klasyfikacji masywu skalnego Terzaghi, RQD, RMR and Q Mniej polecane: GSI

‘Dziesięć Przykazań’ dla używania RMR i Q

Nowa Austriacka Metoda budowania Tuneli

Oszacowanie własności masywów skalnych2

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Nowa Austriacka Metoda Tunelowa ”NATM”

RMR NATM (2004 ÖNORM B2203) Q

80 –100 Class I (80-100) A1 Strong/stable >10060 – 80 Good II (65-80) A2 Loosening/Block failure 10 – 10050 – 60 Fair IIIa (58-65) B1 Friable/Low stress failure 4 – 1040 – 50 IIIb (45-58) B2 Deep stress failure 1 – 420 – 40 Poor IV (29-45) B3 Rock pressure 0.1 – 110 – 20 Va (20-29) C1 Shear failure 0.01 – 0.1 0 – 10 Vb (5-20) C2 Ravelling, flowing < 0.01 “over L1 Soil, high cohesion V” L2 Soil, slight cohesion

New ref: Austrian Society for Geomechanics, 2008 Draft

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Palmström and Singh, 2001

Odkształcenie masywu skalnego

Moduł EM (GPa)

Galera 2008:

EM = Elab e[(RMR - 100)/36]

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Rock Mass Strength (MPa)

MASS = c (intact) e[(RMR - 100)/24] Kalamaras [1995]

Galera 2008:

EMASS= E intacte[(RMR - 100)/36]

dlatego:EM M

Ei c

2/3

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Kalamaras, 1995

Praktyczne zastosowaniaKlasyfikacji w Górnictwie• M-RMR (Laubscher and Taylor, 1975) Mod.RMR (Newman and Bieniawski, 1981) MBRMR (Cummings and Kendorski, 1982) Coal Mining RMR (Unal, 1983) Indian Coal RMR (CMRS, 1986) Coal Mine Roof Rating (Molinda and Mark, 1994) Weak Rock RMR (Unal, 1996) Deutsche Steinkohle klasifikacion (Witthaus,

2006)

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MBR (Mining Basic RMR) system Kendorski et al:

“A rock mass classification for caving mine design”, RETC, 1983, p.193

Conclusions Place rock mass classifications within the

overall engineering design methodology and process;

Observe the Ten Commandments for use of rock mass classifications;

For best engineering practice, exchange experience between tunnelling and mining projects.

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Literatura Alber, M (1996)

Classifying TBM contracts. Tunnels & Tunneling Int., December, p.41.

Aksoy, C O (2008) Review of Rock Mass Rating classification. Journal of Mining Science, v. 44, no. 1, p.51.

Barton, N and Bieniawski, Z T (2008) RMR and Q – Setting records straight. Tunnels & Tunnelling Int., February, p 26.

Bieniawski, Z T (1997) Quo Vasis Rock Mass Classifications. Felsbau, v. 15, no. 3, June, p.177.

Bieniawski, Z T (1992) Design Methodology in Rock Engineering: Theory, Education and practice. A A Balkema Publishers, Rotterdam, 198p.

Jakubec, J and Esterhuizen, G S (2007) Use of mining rock mass rating classification. NIOSH Info. Cir. IC 9498, ed C Mark, p.73.

Kalamaras, G and Bieniawski, Z T (1995) A rock mass strength concept incorporating the effect of time. Proc ISRM Congress, Tokyo, Balkema, p.295.

Palmström, A (2009) Combining the RMR, Q and RMi classification systems. TUST, in press (on line), doi:10.1016.

Palmström, A and Singh, R (2001) The deformation modulus of rock masses – comparisons between in situ tests and indirect estimates. TUST, v.16, p.115.

Ramamurthy, T (2004) A geo-engineering classification for rocks and rock masses. Int.J.Rock Mech., v. 41, p.89.

Ramamurthy, T (2007)) A realistic approach to stand-up time. Proc. 11th ISRM Congress, Lisbon, p. 757.

Russo, G and Grasso, P (2007)On the classification of the rock mass excavation behaviour in tunneling. Proc. 11th ISRM Congress, Lisbon, p.979.

W Y K Ł A D YW Y K Ł A D YDla studentów Górnictwa, Budownictwa i GeologiiDla studentów Górnictwa, Budownictwa i Geologii

ProfesorProfesor

Z.T. Bieniawski Z.T. Bieniawski

A G HA G H

18. X. 201018. X. 2010

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Rock Mass rating

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