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EQUIPMENT AND MATERIALS
ArticleName Selection of suitable drilling method in Razgah nepheline syenite mine, a systematic approach
DOI 10.17580/em.2020.01.11
ArticleAuthor Hoseinie S. H., Ghorbani S., Ghodrat B.
ArticleAuthorData

Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran:

Hoseinie S. H., Head of the Mining Machinery Laboratory, PhD, hadi.hoseinie@iut.ac.ir
Ghorbani S., PhD Candidate

 

Division of Operation and Maintenance Engineering, Lulea University of Technology, Lulea, Sweden:
Ghodrat B., Professor

Abstract

Assessment of rock drillability is an essential stage in selecting the suitable drilling method along with specifying an operation costs and tool wear prediction. Drillability is a complex concept which consist of rock material characteristics, rock mass condition and operational parameters of machine. In this paper, the drillability of ore rock in Razgah Nepheline Syenite mine has been studied to select the suitable drilling method. For this purpose, a stepwise approach is recommended and followed which includes a range of mineralogical, mechanical and physical parameters. During the laboratorial studies which carried on samples collected from bench faces and exploration drilling cores the grain size, grains shape factor and aspect ratio, mineral composition, density, uniaxial compressive strength, Brazilian tensile strength, modulus of elasticity, Schmidt hammer number, Mohs hardness, equivalent quartz content and Schimazek abrasion index were determined based on related ISRM and ASTM standards. The analysis revealed that the studied rock type is classified in moderate strength and abrasive class. In the other hand, considering the scheduled annual production of 1.3 million tones, the borehole diameter is recommended to be six inches. In total, according to laboratorial studies and based on the recommended method for drilling method selection, the down-the-hole (DTH) drilling method is selected as suitable system for studied rock type in Razhag Nefeline Syenite mine. Comparison between the result of presented approach and the past drilling method selection technique reveals that selecting drilling method by focus on mineralogical and hardness values presents more clear result than the past method which considers only uniaxial compressive strength of rock.

The financial support of Isfahan University of Technology and Center of Advanced Mining and Metallurgy (CAMM) at Lulea University of Technology is also acknowledged.

keywords Selection, drillability, hardness, abrasiveness, DTH drilling
References

1. Gokhale B. V. Surface drilling Rotary Drilling and Blasting in Large Surface. CRC Press/Balkema, Leiden, Netherland, 2011. 744 p.
2. Thuro K. Drillability prediction: geological influences in hard rack drill and blast tunneling, International Journal of Earth Sciences. GR Geologische Rundschau. 1997. Vol. 86(2). pp. 426–438.
3. Hustrulid W. A., Kuchta M., Martin, R. K. Open Pit Mine Planning and Design. 3rd Edition, CRC Press, 2013. 1308 p.
4. Jimeno C. L., Jimeno E. L., Carcedo F. J. A., Drilling and Blasting of Rocks. 1st Edition. Balkema, Rotterdam, 1995, 408 p.
5. Drake R. Bench drilling techniques and equipment selection manual. Ingersol-Rand, Italy 2004.
6. Wilbur L. Kuesel T. R., King E. H., Bickel J. O. (Eds). Rock tunnel engineering handbook. Melbourne, Florida : Krieger, 1982.
7. Ersoy A., Waller M. D. Prediction of drill-bit performance using multi-variable linear regression analysis. Transactions of the Institution of Mining and Metallurgy, Section A: Mining Industry, 1995. 104. pp. A101–114.
8. Serradj T. Method of assessment of rock drillability incorporating the Protodyakonov index. Transactions of the Institution of Mining and Metallurgy, Section A: Mining Industry. 1996. Vol. 105. pp. A175–A179.
9. Kahraman S., Balci C., Yazici S., Bilgin N., Prediction of the penetration rate of rotary blast hole drilling using a new drillability index. International Journal of Rock Mechanics and Mining Science. 2000. Vol. 37. pp. 729–743.
10. Hoseinie S. H., Ataei M., Osanloo M. A new classification system for evaluating rock penetrability. International Journal of Rock Mechanics and Mining Sciences. 2009. Vol. 46(8). pp. 1329–1340.
11. Hoseinie S. H., Ataei M., Mikaiel R. Comparison of some rock hardness scales applied in drillability studies. Arabian Journal for Science and Engineering. 2012. Vol. 37(5). pp. 1451–1458.
12. Hoseinie S. H., Ataei M., Mikaiel R. Texture Effects of microfabric on drillability of rocks. Bulletin of Engineering Geology and the Environment. 2017. Vol. 78(3). pp. 1443–1449.
13. Rao K. U. M., Misra B. Principles of rock drilling. Balkema, Rotterdam, 1998.
14. Ersoy A., Waller M. D. Textural characterization of rocks. Journal of Engineering Geology. 1995. Vol. 39(3-4). pp. 123–136.
15. Singh T. N, Gupta A. R, Sain R. A. Comparative analysis of cognitive system for the prediction of drillability of rocks and wear factor. Geotechnical and Geological Engineering. 2006. Vol. 24. pp. 299–312.
16. Thuro K., PLinnge, R. J., Spam G. Drilling, Blasting and Cutting-Is it possible to qualify geological parameters relating to excavability? Proceeding of 9th Congress of International Association of Engineering geology and the Environment. Durban, South Africa, 2002. pp. 2226–2236.
17. Hoseinie S. H., Aghababaei H., Pourrahimian Y. Development of a new classification system for assessing of rock mass drillability index (Rdi). International Journal of Rock Mechanics and Mining Sciences. 2008. Vol. 45(1). pp. 1–10.
18. Kahraman S. Rotary and percussive drilling prediction using regression analysis. International Journal of Rock Mechanics and Mining Science. 1999. Vol. 36. pp. 981–989.
19. Li X., Rupert G., Summers D. A., Santi P., Liu D. Analysis of impact hammer rebound to estimate rock drillability. Journal of Rock Mechanics & Rock Engineering. 2000. Vol. 33(1). pp. 1–13.
20. Singh S. P., Ladouceur M., Rouhi F. Sources, implication and control of blasthole deviation. 7th International Symposium on Mine Planning and Equipment Selection. Balkema, Rotterdam, 1998. pp. 391–397.
21. Akun M. E., Karpuz C. Drillability studies of surface-set diamond drilling in Zonguldak region sandstones from Turkey. International Journal of Rock Mechanics and Mining Science. 2005. Vol. 42. pp. 473–479.
22. Přikryl P. Assessment of rock geomechanical quality by quantitative rock fabric coefficients: limitations and possible source of misinterpretation. Engineering Geology. 2006. Vol. 87. pp. 149–162.
23. Ulusay R., Hudson J. A. The Blue Book–The Complete ISRM Suggested Methods for Rock Characterization. Testing and Monitoring, 1974–2006. Turkish, ISRM and Turkish National Group of ISRM, 2007.
24. Osanloo M., Drilling Methods. Iran: Sadra Publication, 1998.

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