Geomechanics and Engineering

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Investigating the effect of strength on the LCPC abrasivity of igneous rocks

  • Kahraman, Sair (Mining Engineering Department, Hacettepe University) ;
  • Fener, Mustafa (Geological Engineering Department, Ankara University) ;
  • Kasling, Heiko (Engineering Geology Department, Technische Universitat Munchen) ;
  • Thuro, Kurosch (Engineering Geology Department, Technische Universitat Munchen)
  • Received : 2017.08.07
  • Accepted : 2017.12.23
  • Published : 2018.06.10
⟨ Previous Next ⟩

Abstract

The abrasivity of rocks results in tool wear in rock excavation or drilling projects. It can affect significantly the cost and schedule of the projects performed in abrasive rock massess. For this reason, the understanding of the mechanism of rock abrasivity is very important for excavation projects. This study investigates the effect of strength on the LCPC abrasivity coefficient (LAC) for igneous rocks. The LCPT test, the uniaxial compressive strength (UCS) and the Brazilian tensile strength (BTS) tests were carried out on the igneous rock samples. The abrasive mineral content (AMC) was also determined for each rock type. First, the LAC was correlated to the AMC and a very good correlation was found between the two parameters. Then, the multiple regression analysis was carried out by including the AMC, UCS and BTS to the analysis in order to infer the effect of the strength on the LAC. It was seen that the correlation coefficients of multiple regression models were greater than that of the relation between the LAC and the AMC. It is concluded that the AMC is the dominant parameter determining the abrasivity of rock. On the other hand, the rock strength has also significant effect on rock abrasivity.

Keywords

References

  1. Abu Bakar, M.Z.A., Iqbal, M.M., Majeed, Y., Zahoor, M.K. and Fowell, R.J. (2014), "Reduced propeller speed effects on LCPC rock abrasivity test", Pakistan J. Sci., 66(1), 25-28.
  2. Atkinson, T., Cassapi, V., Singh, R.N. (1986), "Assessment of abrasive wear resistance potential in rock excavation machinery", J. Min. Geol. Eng., 4(2), 151-163. https://doi.org/10.1007/BF01560672
  3. Buchi, E., Mathier, J.F. and Wyss, C. (1995), "Rock abrasivity-A significant cost factor for mechanical tunnelling in loose and hard rock", Tunnel, 5(95), 38-44.
  4. Cheshomi, A. and Moradhaseli, S. (2017), "Effect of petrographic characteristics on abrasive properties of granitic building stones", Q. J. Eng. Geol. Hydrogeol., 50(3), 347-353. https://doi.org/10.1144/qjegh2016-048
  5. Drucker, P. (2011), "Validity of the LCPC abrasivity coefficient through the example of a recent Danube gravel", Geomech. Tunn., 4(6), 681-691. https://doi.org/10.1002/geot.201100051
  6. Dullmann, J., Alber, M. and Plinninger, R.J. (2014), "Determining soil abrasiveness by use of index tests versus using intrinsic soil parameters", Geomech. Tunn., 7(1), 87-97. https://doi.org/10.1002/geot.201310028
  7. Er, S. and Tugrul, A. (2016), "Correlation of physico-mechanical properties of granitic rocks with Cerchar Abrasivity Index in Turkey", Measurement, 91, 114-123. https://doi.org/10.1016/j.measurement.2016.05.034
  8. Fowell, R.J. and Abu Bakar, M.Z.A. (2007), "A review of the Cerchar and LCPC rock abrasivity measurement methods", Proceedings of the 11th Congress of the International Society for Rock Mechanics, Lisbon, Portugal, July.
  9. Hashemnejad, H., Ghafoori, M., Lashkaripour, G.R., and Azali, S.T. (2012), "Effect of geological parameters on soil abrasivity using LCPC machine for predicting LAC", J. Emerg. Technol. Adv. Eng., 2, 71-76.
  10. Hassanpour, J., Rostami, J., Tarigh Azali, S. and Zhao, J. (2014), "Introduction of an empirical TBM cutter wear prediction model for pyroclastic and mafic igneous rocks: A case history of Karaj water conveyance tunnel, Iran", Tunn. Undergr. Sp. Technol., 43, 222-231. https://doi.org/10.1016/j.tust.2014.05.007
  11. ISRM (2007), The Complete ISRM Suggested Methods for Rock Characterization, Testing and Monitoring: 1974-2006. International Society for Rock Mechanics, Compilation Arranged by the ISRM Turkish National Group, Kozan Ofset, Ankara, Turkey.
  12. Kahraman, S., Fener, M., Kasling, H. and Thuro, K. (2016), "The influences of textural parameters of grains on the LCPC abrasivity of coarse-grained igneous rocks", Tunn. Undergr. Sp. Technol., 58, 216-223. https://doi.org/10.1016/j.tust.2016.05.011
  13. Kasling, H. and Thuro, K. (2010a), "Determining rock abrasivity in the laboratory", Proceedings of the European Rock Mechanics Symposium (EUROCK 2010), Lausanne, Switzerland, June.
  14. Kasling, H. and Thuro, K. (2010b), "Determining abrasivity of rock and soil in the laboratory", Proceedings of the 11th International Association of Engineering Geology Conference, Auckland, New Zealand, September.
  15. Ko, T.Y., Kim, T.K., Son, Y. and Jeon, S. (2016), "Effect of geomechanical properties on Cerchar Abrasivity Index (CAI) and its application to TBM tunneling", Tunn. Undergr. Sp. Technol., 57, 99-111. https://doi.org/10.1016/j.tust.2016.02.006
  16. Kohler, M., Maidl, U., Martak, L. (2011), "Abrasiveness and tool wear in shield tunnelling in soil", Geomech. Tunn., 4(1), 36-54. https://doi.org/10.1002/geot.201100002
  17. Lee, S., Jeong, H.Y. and Jeon, S. (2013), "Assessment of TBM cutter wear using Cerchar abrasiveness test", Proceedings of the World Tunnel Congress 2013, Geneva, Switzerland, May-June.
  18. Mathier, J.F. and Gisiger, J.P. (2003), "Abrasivity of Icelandic basalts", Proceedings of the 10th ISRM Conference: Technology Roadmap for Rock Mechanics, Sandton, South Africa, September.
  19. Moradizadeh, M., Cheshomi, A., Ghafoori, M. and Trigh Azali, S. (2016), "Correlation of equivalent quartz content, Slake durability index and Is50 with Cerchar abrasiveness index for different types of rock", J. Rock Mech. Min. Sci., 86, 42-47.
  20. Nilsen, B., Dahl, F., Holzhauser, J. and Raleigh, P. (2006), "Abrasivity of soils in TBM tunneling", Tunn.Tunn., 36-38.
  21. Nilsen, B., Dahl, F., Holzhauser, J. and Raleigh, P. (2007), "New test methodology for estimating the abrasiveness of soils for TBM tunneling", Proceedings of the Rapid Excavation and Tunneling Conference (RETC), Toronto, Canada, June.
  22. Normalisation Francaise P18-579 (1990), Granulats: Essaid'abrasiviteet de Broyabilite, AFNOR Association Francaise de Normalisation, Paris, France.
  23. Plinninger, R., Kasling, H., Thuro, K. and Spaun, G. (2003), "Testing conditions and geomechanical properties influencing the CERCHAR abrasiveness index (CAI) value", J. Rock Mech. Min. Sci., 40(2), 259-263. https://doi.org/10.1016/S1365-1609(02)00140-5
  24. Plinninger, R.J., Spaun, G., Thuro, K. (2002), "Prediction and classification of tool wear in drill and blast tunneling", Proceedings of the 9th Congress of the International Association for Engineering Geology and the Environment, Durban, South Africa, September.
  25. Rostami, J. (2016), "Performance prediction of hard rock Tunnel Boring Machines (TBMs) in difficult ground", Tunn. Undergr. Sp. Technol., 57, 173-182. https://doi.org/10.1016/j.tust.2016.01.009
  26. Thuro, K., Singer, J., Kasling, H. and Bauer, M. (2007), "Determining abrasivity with the LCPC test", Proceedings of the 1st Canada-U.S. Rock Mechanics Symposium, Vancouver, Canada, May.
  27. Verhoef, P.N.W. (1997), Wear of Rock Cutting Tools, in Implications for the Site Investigation of, CRC Press, London, U.K.
  28. West, G. (1989), "Rock abrasiveness testing for tunneling", J. Rock Mech. Min. Sci. Geomech. Abstr., 26(2), 151-160. https://doi.org/10.1016/0148-9062(89)90003-X
  29. Yarali, O., Yasar, E., Bacak, G. and Ranjith, P.G. (2008), "A study of rock abrasivity and tool wear in coal measures rocks", J. Coal Geol., 74(1), 53-66. https://doi.org/10.1016/j.coal.2007.09.007