Efficiency of Rock Cutting and Wear Behavior of Coated Bits via Lab-Scale Linear Rock-Cutting Machine: Experimental Approach
Publication: International Journal of Geomechanics
Volume 23, Issue 2
Abstract
In mining industries, the prime concern is to overcome the challenges of using conical cutting bits for excavating hard and abrasive rocks. In this research, a speculative investigation was performed to measure the efficiency of rock cutting and identify the wear behavior of aluminum titanium nitride-coated conical cutting bits. A newly designed and customized shaping machine is used with a triaxial force dynamometer to cut the rock samples linearly and to calculate their associated powers. Coated conical bits have a maximum hardness range of 2,291 to 2,459 HV, and uncoated conical bits possess minimum hardness range of 1,945 to 1,948 HV. Two rock samples of fine-grained sandstone with UCS of 83.77 and 97.00 MPa are used in this study. Various cutting ranges were investigated and the best range of cutting parameters are identified between the variables, such as cutting forces and extracted volume of rock, cutting effectiveness, specific energy produced while cutting, and bit wear. The percentage decrease in wear rate of a coated conical bit compared with an uncoated conical bit is 40.36%, 52.28%, and 53.30% for Rock 1 and 42.67%, 54.76%, and 60.90% for Rock 2 under varying depths of cut. The worn surface has been significantly investigated through scanning electron microscopy and energy dispersive X-ray analysis. The output of this study helps in extending the application of a surface miner for excavating harder rocks in mines.
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Acknowledgments
The corresponding author thanks the Department of Mining Engineering, Indian Institute of Technology Kharagpur, West Bengal, for providing the resources and laboratory facilities.
References
Alehossein, H., X. S. Li, and J. N. Boland. 2009. “Towards improving rock cutting tools using thermally stable diamond composites.” Adv. Mater. Res. 76–78: 585–590. https://doi.org/10.4028/www.scientific.net/AMR.76-78.585.
ASTM. 2010. Standard test method for laboratory determination of abrasiveness of rock using the CERCHAR method. ASTMD7625–10. West Conshohocken, PA: ASTM.
Balci, C., and N. Bilgin. 2006. “Correlative study of linear small and full-scale rock cutting tests to select mechanized excavation machines.” Int. J. Rock Mech. Min. Sci. 32: 468–476.
Balci, C., M. A. Demircin, H. Copur, and H. Tuncdemir. 2004. “Estimation of optimum specific energy based on rock properties for assessment of roadheader performance.” J. South Afr. Inst. Min. Metall. 104: 633–642.
Balci, C., and D. Tumac. 2012. “Investigation into the effects of different rocks on rock cuttability by a V-type disc cutter.” Tunnelling Underground Space Technol. 30: 183–193. https://doi.org/10.1016/j.tust.2012.02.018.
Bao, R. H., L. C. Zhang, Q. Y. Yao, and J. Lunn. 2011. “Estimating the peak indentation force of the edge chipping of rocks using single point-attack pick.” Rock Mech. Rock Eng. 44 (3): 339–347. https://doi.org/10.1007/s00603-010-0133-2.
Bilgin, N., H. Copur, and C. Balci. 2014. Mechanical excavation in mining and civil industries. Boca Raton, FL: CRC Press.
Bilgin, N., M. A. Demircin, H. Copur, C. Balci, H. Tuncdemir, and N. Akcin. 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 (1): 139–156. https://doi.org/10.1016/j.ijrmms.2005.04.009.
Boland, J. N. 2002. “Diamond composite rock cutting tools.” In Proc., European Conf. on Hard Materials and Diamond Tooling, 103–108. France: European Powder Metallurgy Association AISBL.
Boland, J. N., and X. S. Li. 2010. “Microstructural characterisation and wear behaviour of diamond composite materials.” Materials 3 (2): 1390–1419. https://doi.org/10.3390/ma3021390.
Copur, H., N. Bilgin, C. Balci, D. Tumac, and E. Avunduk. 2017. “Effects of different cutting patterns and experimental conditions on the performance of a conical drag tool.” Rock Mech. Rock Eng. 50 (6): 1585–1609. https://doi.org/10.1007/s00603-017-1172-8.
Copur, H., H. Tuncdemir, C. Balci, and A. Ozturk. 2003. Investigation of the parameters affecting rock brittleness from the rock cutting mechanics point of view. TUBITAK Project Rep. INTAG-721. Istanbul, Turkey: Istanbul Technical Univ., Mining Engineering Dept.
Copur, H., H. Tuncdemir, N. Bilgin, and T. Dinçer. 2001. “Specific energy as a criterion for the use of rapid excavation systems in Turkish mines.” Trans. Inst. Min. Metall., Sect. A 110: 149–157.
Demou, S. G., R. C. Olson, and C. F. Wingquist. 1983. Determination of bit forces encountered in hard rock cutting for application to continuous miner design. US Bureau of Mines RI8748. Washington, DC: U.S. Dept. of the Interior.
Entacher, M., S. Lorenz, and R. Galler. 2014. “Tunnel boring machine performance prediction with scaled rock cutting tests.” Int. J. Rock Mech. Min. Sci. 70: 450–459. https://doi.org/10.1016/j.ijrmms.2014.04.021.
Entacher, M., E. Schuller, and R. Galler. 2015. “Rock failure and crack propagation beneath disc cutters.” Rock Mech. Rock Eng. 48 (4): 1559–1572. https://doi.org/10.1007/s00603-014-0661-2.
Evans, I. 1972. “Line spacing of picks for effective cutting.” Int. J. Rock Mech. Min. Sci. Geomech. Abstr. 9 (3): 355–361. https://doi.org/10.1016/0148-9062(72)90003-4.
Evans, I. 1984. “A theory of the cutting force for point-attack picks.” Int. J. Min. Eng. 2 (1): 63–71. https://doi.org/10.1007/BF00880858.
Goktan, R. M. 1997. “A suggested improvement on Evans’ cutting theory for conical bits.” In Proc., 4th Int. Symp. on Mine Mechanization and Automation, 57–61. Kenmore, Queensland: Cooperative Research Centre for Mining Technology and Equipment.
Goktan, R. M., and N. Gunnes. 2005. “A semi-empirical approach to cutting force prediction for point-attack picks.” J. South Afr. Inst. Min. Metall. 105: 257–263.
He, X., and C. Xu. 2016. “Specific energy as an index to identify the critical failure mode transition depth in rock cutting.” Rock Mech. Rock Eng. 749 (4): 1461–1478. https://doi.org/10.1007/s00603-015-0819-6.
Hurt, K. G., and K. MacAndrew. 1981. “Designing road header cutting heads.” Min. Eng. 141: 167–170.
Jacobs, N., and P. Hagan. 2009. “The effect of stylus hardness and some test parameters on CERCHAR Abrasivity Index.” In Proc., of 43rd US Rock Mechanics Symp. Alexandria, Virginia: American Rock Mechanics Association (ARMA).
Kang, H., J.-W. Cho, J.-Y. Park, J.-S. Jang, J.-H. Kim, K.-W. Kim, J. Rostami, and J.-W. Lee. 2016. “A new linear cutting machine for assessing the rock-cutting performance of a pick cutter.” Int. J. Rock Mech. Min. Sci. 88: 129–136. https://doi.org/10.1016/j.ijrmms.2016.07.021.
Langham-Williams, J., and P. Hagan. 2014. “An assessment of the correlation between the strength and cuttability of rock.” In Proc., 14th Underground Coal Operators’ Conf. Wollongong, Australia: Univ. of Wollongong.
Li, X. S., and J. N. Boland. 2005. “The wear characteristics of superhard composite materials in abrasive cutting operations.” Wear 259 (7–12): 1128–1136. https://doi.org/10.1016/j.wear.2005.02.091.
Li, X. S., J. N. Boland, and H. Guo. 2008. “A comparison of wear and cutting performance between diamond composite and tungsten carbide tools.” Ind. Diamond Rev. 1: 51–54.
Li, X. S., and Y. Sun 2013. “Development of hard rock cutting tool with advanced diamond composites.” Adv. Mater. Res. 690–693: 1831–1835. https://doi.org/10.4028/www.scientific.net/AMR.690-693.1831.
Li, X. S., B. Tiryaki, and P. W. Cleary. 2011. “Hard rock cutting with smart cut technology.” In Proc., 22nd World Mining Congress and Expo, 726–732. Ankara, Turkey: Aydoğdu Ofset.
Liu, Z. C., and F. Roxborough. 1996. Mining science and technology. Amsterdam, Netherlands: Balkema.
McFeat-Smith, I. 1977. “Rock property testing for the assessment of tunnelling machine performance.” Tunnels Tunnelling Int. 9 (2): 29–33.
Menezes, P. L., M. R. Lovell, I. V. Avdeev, and C. F. Higgs. 2014. “Studies on the formation of discontinuous rock fragments during cutting operation.” Int. J. Rock Mech. Min. Sci. 71: 131–142. https://doi.org/10.1016/j.ijrmms.2014.03.019.
Moseley, S. G., K. P. Bohn, and M. Goedickemeier. 2009. “Core drilling in reinforced concrete using polycrystalline diamond (PCD) cutters: Wear and fracture mechanisms.” Int. J. Refract. Met. Hard Mater 27 (2): 394–402. https://doi.org/10.1016/j.ijrmhm.2008.11.014.
Mostafavi, S., Q. Y. Yao, L. C. Zhang, X. S. Li, J. Lunn, and C. Melmeth. 2006. “Effect of attack angle on the pick performance in linear rock cutting.” In Proc., 45th US Rock Mechanics/Geomechanics Symp. California, CA: American Rock Mechanics Association.
Palaniappan, S. K., S. K. Pal, M. Chinnasamy, and R. Rathanasamy. 2021. “Performance assessment of hard coating on rock cutting bit and process parameter optimization through multi-response approach using DEAR-Taguchi technique.” Arabian J. Geosci. 14 (11): 959. https://doi.org/10.1007/s12517-021-07302-0.
Palaniappan, S. K., S. K. Pal, and M. P. Dikshit. 2020. “A study on rock cutting forces and wear mechanisms of coated picks by lab-scale linear cutting machine.” In Proc., 28th Int. Symp. on Mine Planning and Equipment Selection, 467–475. Cham, Switzerland: Springer International Publishing AG.
Pal Dey, S., and S. C. Deevi. 2003. “Single layer and multilayer wear resistant coatings of (Ti, Al)N: A review.” Mater. Sci. Eng., A 342 (1–2): 58–79. https://doi.org/10.1016/S0921-5093(02)00259-9.
Rogers, S., and B. Roberts. 1991. “Wear mechanisms associated with rock excavation using attack picks.” Min. Sci. Technol. 12 (3): 317–323. https://doi.org/10.1016/0167-9031(91)91249-H.
Roxborough, F. F., and Z. C. Liu. 1995. “Theoretical considerations on pick shape in rock and coal cutting.” In Proc., 6th Underground Operator’s Conf, 189–193. Kalgoorlie, WA: Western Australian School of Mines.
Roxborough, F. F., and H. R. Phillips. 1974. “Experimental studies on the excavation of rocks using picks.” In Proc., 3rd ISRM Congress, 1407–1412. Lisbon, Portugal: International Society for Rock Mechanics and Rock Engineering.
Roxborough, F. F., and H. R. Phillips. 1975. “Rock excavation by disc cutter.” Int. J. Rock Mech. Min. Sci. Geomech. Abstr. 12 (12): 361–366. https://doi.org/10.1016/0148-9062(75)90547-1.
Roxborough, F. F., and G. C. Sen. 1986. “Breaking coal and rock, Australian coal mining practice.” Aust. Inst. Min. Metall. 8: 130–147.
Sun, Y., X. S. Li, and W. Shao. 2012. “Influence of cutting parameters and interactions on the depth of cut in continuous mining operation.” In Proc., 2nd Int. Conf. on Advanced Engineering Materials and Technology, 1422–1428. Stafa-Zurich, Switzerland: Trans Tech Publications.
Thuro, K., and R. J. Plinninger. 2003. “Hard rock tunnel boring, cutting, drilling and blasting: Rock parameters for excavatability.” In Proc., 10th Int. Congress on Rock Mechanics. Lisbon, Portugal: International Society for Rock Mechanics and Rock Engineering.
Tiryaki, B. 2006. “Evaluation of the indirect measures of rock brittleness and fracture toughness in rock cutting.” J. South. Afr. Inst. Min. Metall. 106: 409–423.
Tumac, D., and C. Balci. 2015. “Investigations into the cutting characteristics of CCS type disc cutters and the comparison between experimental, theoretical and empirical force estimations.” Tunnelling Underground Space Technol. 45: 84–98. https://doi.org/10.1016/j.tust.2014.09.009.
Tumac, D., N. Bilgin, C. Feridunoglu, and H. Ergin. 2007. “Estimation of rock cuttability from shore hardness and compressive strength properties.” Rock Mech. Rock Eng. 40 (5): 477–490. https://doi.org/10.1007/s00603-006-0108-5.
Uhlmann, E., and J. Koenig. 2009. “CVD diamond coatings on geometrically complex cutting tools.” CIRP Ann. 58 (1): 65–68. https://doi.org/10.1016/j.cirp.2009.03.063.
Upadhyaya, G. S. 1998. Cemented tungsten carbides: Production, properties and testing. Park Ridge, NJ: Noyes Publications.
Yilmaz, N. G., M. Yurdakul, and R. M. Goktan. 2007. “Prediction of radial bit cutting force in high-strength rocks using multiple linear regression analysis.” Int. J. Rock Mech. Min. Sci. 44 (6): 962–970. https://doi.org/10.1016/j.ijrmms.2007.02.005.
Zhang, D., B. Shen, and F. Sun. 2010. “Study on tribological behavior and cutting performance of CVD diamond and DLC films on Co-cemented tungsten carbide substrates.” Appl. Surf. Sci. 256 (8): 2479–2489. https://doi.org/10.1016/j.apsusc.2009.10.092.
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Information
Published In
International Journal of Geomechanics
Volume 23 • Issue 2 • February 2023
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Mar 29, 2021
Accepted: Jul 15, 2022
Published online: Nov 18, 2022
Published in print: Feb 1, 2023
Discussion open until: Apr 18, 2023
ASCE Technical Topics:
- Business management
- Chemical compounds
- Chemical elements
- Chemicals
- Chemistry
- Construction engineering
- Construction methods
- Engineering fundamentals
- Environmental engineering
- Erosion
- Excavation
- Geology
- Geotechnical engineering
- Hardness (material)
- Industries
- Laboratory tests
- Linear functions
- Material mechanics
- Material properties
- Materials engineering
- Mathematical functions
- Mathematics
- Organizations
- Practice and Profession
- Rocks
- Tests (by type)
- Titanium
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Cited by
- Krzysztof Krauze, Kamil Mucha, Tomasz Wydro, Jan Pawlik, Aleksandra Wróblewska-Pawlik, Mass and Volumetric Abrasive Wear Measurements of the Mining Conical Picks, Sustainability, 10.3390/su15010850, 15, 1, (850), (2023).