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A G H 2010

A G H 2010. Badania Polowe. Teoria , Metodologia i Praktyka. Profesor Zdzis ł aw Bieniawski. “Idea” #1. Badania polowe w Geoinżynierii. Plate jacking tests. Another well-known in situ test. Large Flat Jack (LFJ) test.

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A G H 2010

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  1. A G H 2010 BadaniaPolowe Teoria, Metodologia iPraktyka Profesor Zdzisław Bieniawski

  2. “Idea” #1 Badania polowe w Geoinżynierii

  3. Plate jacking tests

  4. Another well-known in situ test Large Flat Jack (LFJ) test

  5. Other types of large in situ testsTri-axial block test Coal mine pillar test

  6. RMR versus Rock Mass Modulus Em from penetrometer tests (Galera 2005)

  7. RMR versus ratio Emass/Eintact(penetrometer data after Galera 2005)

  8. Rock mass deformation Modulus (GPa) EMASS = 10[(RMR - 10)/40]and for RMR > 50: EMASS = 2RMR – 100 Latest correlations (Galera 2008): EMASS= 147 e[(RMR - 100)/24] - 0.2RMR Alternatively for RMR < 50: EMASS= 0.09RMR and for RMR > 50: EMASS = 0.09 RMR + 1.06 (RMR-50) + 0.015(RMR-50)2 Correlation coefficient: R = 0.89.

  9. Rock Mass Modulus versus RMR and Q (check correlation)

  10. Rock Mass Strength Kalamaras, 1995

  11. Rock mass deformation Modulus Another correlation by Galera 2008: EMASS= Eintacte[(RMR - 100)/36] For full range of RMR

  12. Rock mass strength (MPa) sMASS = sc intacte[(RMR - 100)/24]Kalamaras [1995] As per the last correlation of Galera 2008: EMASS= E intacte[(RMR - 100)/36] it follows: EMsM Eisc 2/3

  13. concerning Rock Mass Strength W a r n i n g ! This expression: EMsM Eisc is preferable to the Hoek – Brown criterion in which: m/mi= e[(RMR - 100)/28]ands= e[(RMR - 100)/9] Due to uncertainty of mi values and equating RMR with GSI 2/3

  14. Example of needed Rock Mechanics focus Mechanized excavation in Mining and Tunneling deserves special attention in Rock Mechanics today Consider the case of TBM tunneling: determination of rock mass excavability (TBM rate of advance)

  15. World Record! The largest Tunnel Boring Machine (T B M) cannot function without Rock Mechanics!

  16. Ratings for Rock Mass Excavability index (RME): Input parameters

  17. Roof Span versus Stand Up Time as function of RMR and Q

  18. Correlation between Rock Mass Excavability index (RME) and Average Rate of Advance (m/day) for Double Shield TBMs

  19. Double Shield TBMs σci < 45 MPa

  20. “Idea” #3 Maszyny tarczowe T B M

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