Bulletin of Engineering Geology and the Environment

, Volume 74, Issue 4, pp 1349–1361 | Cite as

Cuttability assessment using the Drilling Rate Index (DRI)

  • Serdar YasarEmail author
  • Mehmet Capik
  • Ali Osman Yilmaz
Original Paper


For given geological conditions, cuttability or performance prediction can be expressed by specific cutting force (SFC), specific normal force (SFN), specific energy (SE), and pick wear rate. These parameters are difficult to determine. For this reason researchers try to assess these parameters indirectly by rock mechanical parameters. The Drilling Rate Index (DRI) is the most important input parameter of a commonly used performance prediction model for tunnel boring machines. However, little research has been seen in the literature about assessing cuttability indirectly by DRI. In this study, different types of rock and ore samples were subjected to a small-scale rock cutting test, the Cerchar abrasivity test, the Sievers J miniature drill test, and the brittleness (S 20) test. With the aid of the Sievers and brittleness test results, the DRI parameter was determined. SFC, SFN, and SE, which are the output parameters of small scale rock cutting tests, and the Cerchar abrasivity index values were correlated with Sievers J (S j ) value and DRI. It was seen that SFC, SFN, SE and CAI parameters slightly decreased with increasing Sievers J value and DRI. With these results, it can be stated that DRI and S j could be an alternative to other mechanical rock parameters for assessing cuttability.


Small Scale Rock Cutting Test Specific energy Cutter forces Cerchar Abrasivity Index (CAI) Drilling Rate Index (DRI) 



Especially to Prof. Dr. Nuh Bilgin, Prof. Dr. Hanifi Copur and Assoc. Prof. Dr. Deniz Tumac, the authors would like to thank to all the crew of the Mine Mechanization and Technology Division of Istanbul Technical University for their generous help. Additionally, the authors would like to acknowledge Prof. Dr. Bjorn Nilsen (NTNU, Norway), Filip Dahl (SINTEF, Norway), and Prof. Dr. Amund Bruland (NTNU, Norway).


  1. Abu Bakar MZ, Gertsch LS (2013) Evaluation of saturation effects on drag pick cutting of a brittle sandstone from full scale linear cutting tests. Tunn Undergr Space Technol 34:124–134CrossRefGoogle Scholar
  2. Al-Ameen SI, Waller MD (1994) The influence of rock strength and abrasive mineral content on the Cerchar abrasivity index. Eng Geol 36:293–301CrossRefGoogle Scholar
  3. Altindag R (2003) Correlation of spesific energy with rock brittleness concepts on rock cutting. J South Af Inst Min Met 103:163–171Google Scholar
  4. Balci C, Bilgin N (2007) Correlative study of linear small and full-scale rock cutting tests to select mechanized excavation machines. Int J Rock Mech Min Sci 44:468–476CrossRefGoogle Scholar
  5. Balci C, Demircin MA, Copur H, Tuncdemir H (2004) Estimation of optimum specific energy based on rock properties for assessment of roadheader performance. J South Af Inst Min Met 104:633–642Google Scholar
  6. Bamford WE (1987) ISRM-Comission on rock boreability, cuttability and drillability. Notes for Workshop, CanadaGoogle Scholar
  7. Bilgin N (1977) Investigation into mechanical cutting characteristics of some medium and high strength rocks. PhD Thesis, Newcastle Upon Tyne University, EnglandGoogle Scholar
  8. Bilgin N, Demircin MA, Copur H, Balci C, Tuncdemir H, Akcin N (2006) Dominant rock properties affecting the performance of conical picks and the comparison of some experimental and theoretical results. Int J Rock Mech Min Sci 43:139–156CrossRefGoogle Scholar
  9. Bilgin N, Copur H, Balci C (2014). Mechanical Excavation in Mining and Civil Industries, CRC Press, p 366Google Scholar
  10. Blindheim OT (1979) Boreability predictions for tunneling. PhD Thesis, Department of Geological Engineering, The Norwegian Institute of Technology, NorwayGoogle Scholar
  11. Bruland A (1998) Hard rock tunnel boring. PhD Thesis, Norwegian University of Science and Technology (NTNU), NorwayGoogle Scholar
  12. Capik M, Yilmaz AO, Yasar S, Yarali O, Cavusoglu I (2013) Comparison of drillability and abrasivity properties of rocks (in Turkish). In: 23rd IMCET, Antalya, pp 659–669Google Scholar
  13. Comakli R, Kahraman S, Balci C (2014) Performance prediction of roadheaders in metallic ore excavation. J TUST 40:38–45Google Scholar
  14. Copur H, Tuncdemir H, Bilgin N, Dincer T (2001) Specific energy as a criterion for use of rapid excavation systems in turkish mines. Trans Inst Min Met Sec A 110:149–157Google Scholar
  15. Copur H, Balci C, Bilgin N, Tumac D, Avunduk E (2012) Predicting cutting performance of chisel tools by using physical and mechanical properties of natural stones. EUROCK 2012, 28–30 May, Stockholm, p 14Google Scholar
  16. Dahl F (2003) Draft of DRI, BWI, CLI standard. Available at Accessed 02 July 2014
  17. Dahl F, Bruland A, Jakobsen PD, Nilsen B, Grøv E (2012) Classifications of properties influencing the drillability of rocks based on the NTNU/SINTEF test method. J TUST 28:150–158Google Scholar
  18. Dursun AE, Gokay MK (2014) Determination of cutting force from some rock properties of rock using statistical method (in Turkish). In: ROCMECH 2014, Afyonkarahisar, Turkey, pp 335–342Google Scholar
  19. Evans I (1962) A theory of the basic mechanics of coal ploughing, In: International Symposium on Mining Research, Missouri, pp 761–798Google Scholar
  20. Fowell RJ, Gillani T, Altınoluk S (1992) Wear characterization of rock. EUROCK 92. Chester, England, pp 13–18Google Scholar
  21. Hemphill GB (2013) Practical tunnel construction. John Wiley Sons, Inc., p 415Google Scholar
  22. Johnson ST, Fowell RJ (1986) Compressive strength is not enough: assessing pick wear rates for drag tool equipped machines, In: 27th U.S. Rock Mechanics Symposium, Tuscaloosa, pp 840–845Google Scholar
  23. Matern N von, Hjelmer A (1943) Försök med pågrus (Tests with Chippings), Medelande nr. 65, Statens väginstitut, Stockholm, pp 65 (English summary, pp 56–60)Google Scholar
  24. McFeat-Smith I, Fowell RJ (1979) The selection and application of roadheaders for rock tunneling. In: RETC 79, Georgia, pp 261–279Google Scholar
  25. Merchant ME (1945) Basic mechanics of metal cutting process. J App Mech 11: A-168Google Scholar
  26. Nishimatsu Y (1972) The mechanics of rock cutting. Int J Rock Mech Min Sci 9:261–270CrossRefGoogle Scholar
  27. Plinninger RJ, Spaun G, Thuro K (2002) Predicting tool wear in drill and blast. Tunnels and Tunnelling International pp 1–5Google Scholar
  28. Plinninger R, Kasling H, Thuro K, Spaun G (2003) Testing conditions and geomechanical properties influencing the Cerchar abrasiveness index (CAI) value. Int J Rock Mech Min Sci 40:259–263CrossRefGoogle Scholar
  29. Rostami J (1997) Development of a force estimation model for rock fragmentation with disc cutters through theoretical modeling and physical measurement of crushed zone pressure. PhD Thesis, Colorado School of Mines, USAGoogle Scholar
  30. Rostami J, Ozdemir L (1993) A new model for performance prediction of hard rock TBM, In: RETC 93, Boston, pp 793–809Google Scholar
  31. Roxborough FF (1985) Research in mechanical rock excavation: progress and prospects. In: RETC 85, Las Vegas, pp 225–244Google Scholar
  32. Roxborough FF (1987) The role of some basic rock properties in assessing cuttability. Seminar on Tunnels, In: Wholly Engineered structures, Sydney, Australia, p 21Google Scholar
  33. Roxborough FF, Pedroncelli EJ (1982) A practical evaluation of some coal-cutting theories using a continuous miner. Min Eng pp 145–155Google Scholar
  34. Roxborough FF, Philips HR (1974) Experimental studies on the excavation of rocks using picks. In: Third ISRM Congress, Denver, pp 1407–1412Google Scholar
  35. Roxborough FF, Rispin A (1973) The mechanical cutting characteristics of the lower chalk. Tunnels and Tunnelling pp 45–67Google Scholar
  36. Selmer-Olsen R, Lien R (1960) Bergartens borbarhet og sprengbarhet. Teknisk Ukeblad nr. 34, Oslo, pp 3–11Google Scholar
  37. Sievers H (1950) Die bestimmung des bohrwiderstandes von gesteinen. Glückauf 86:776–784Google Scholar
  38. Suana M, Peters T (1982) The Cerchar abrasivity index and its relation to rock mineralogy and petrography. Rock Mech 15:1–7CrossRefGoogle Scholar
  39. Tiryaki B, Dikmen AC (2006) Effect of rock properties on spesific cutting energy in linear cutting of sandstones by picks. Rock Mech Rock Eng 39:89–120CrossRefGoogle Scholar
  40. Tumac D, Bilgin N, Feridunoglu C, Ergin H (2007) Estimation of rock cuttability from shore hardness and compressive strength properties. Rock Mech Rock Eng 40:477–490CrossRefGoogle Scholar
  41. West G (1986) A relation between abrasiveness and quartz content for some Coal Measures sediments. Int J Min Geol Eng 4:73–78CrossRefGoogle Scholar
  42. Yagiz S (2006) An investigation on the relationship between linear cutting force and some engineering properties of rocks (in Turkish). In: VIII. Regional Rock Mechanics Symposium, pp 99–106Google Scholar
  43. Yarali O, Kahraman S (2011) The drillabilty assessment of rocks using the different brittleness values. J Tust 26:406–414Google Scholar
  44. Yarali O, Soyer E (2013) Assessment of relationships between drilling rate index and mechanical properties of rocks. J Tust 33:46–53Google Scholar
  45. Yasar S, Yilmaz AO, Capik M (2013) Investigation on relations between tool forces and mechanical characteristics of rocks (in Turkish). 3. UYAK, Istanbul, pp 83–90Google Scholar
  46. Yasar S, Yilmaz AO, Capik M (2014) Investigation on relationships between brittleness properties and cuttability parameters of rocks (in Turkish). ROCMECH 2014. Afyonkarahisar, Turkey, pp 343–350Google Scholar
  47. Zare S, Bruland A (2013) Applications of NTNU/SINTEF drillability indices in hard rock tunneling. Rock Mech Rock Eng 46:179–187CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Department of Mining Engineering, Faculty of EngineeringKaradeniz Technical UniversityTrabzonTurkey

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