EFFECT OF CUTTING PICKS AND CUTTING PERFORMANCE ON UNIAXIAL COMPRESSIVE STRENGTH

Year 2012, Issue: 027, 89 - 96, 16.04.2012

Cihan Doğruöz Naci Bölükbaşı

Abstract

Sharp picks become blunt due to wear in
time and require replacement. Although it is known that the pick blunting
affects adversely the rock cuttability, no study exists to show the
relationships between the degree of pick wear and the cutting specific energy
obtained by standard cutting tests. In this study, standard cutting tests were
carried out on different rock types, with picks having varying degrees of
blunting and the relationships between the uniaxial compressive strength
parameter were established.

Keywords

Wear flat, uniaxial compressive strength, cutting picks

KESİCİ UÇLAR VE KESME PERFORMANSININ TEK EKSENLİ BASMA DAYANIMINA ETKİSİ

Abstract

Keskin uçlar aşınmaya bağlı olarak
zamanla körleşmekte ve değiştirilmeleri gerekmektedir. Kesici uçlardaki
körleşmenin kayaçların kesilebilirliğini olumsuz etkilediği bilinmekle
birlikte, körleşme derecesi ile standart kesme deneyleri sonucu elde edilen kesme
özgül enerjisi arasındaki ilişki üzerine bir çalışma henüz bulunmamaktadır. Bu
çalışmada, değişik körleşme derecelerindeki kesici uçlar kullanılarak değişik
kayaçlar üzerinde standart kesme deneyleri yapılmış ve tek eksenli basma
dayanımı parametresi ile aralarındaki ilişkiler saptanmıştır.

Keywords

Aşınma yüzeyi genişliği, tek eksenli basma dayanımı, kesici uçlar

References

• [1] McFeat-Smith, I. and Fowell, R.J. ‘Correlation of Rock Properties and the Cutting Performance of Tunnelling Machines’. Proceedings Conference on Rock Engineering, 4-7 April 1977, Newcastle upon Tyne, p.581.
• [2] Gehring, K. H., “A cutting comparison”, Tunnels & Tunneling, pp. 27-30, November, 1989. Bilgin, N., Yazıcı, S., Eskikaya, Ş., “A Model to Predict the Performance of Roadheaders and Impact Hammers in Tunnel Drivages”, EUROCK ’96, pp. 710-721, Torino, September 2-5, 1996.
• [3] Çopur, H., Özdemir, L., Rostami, J., “Roadheader Applications in Mining and Tunneling Industries”, The Mining Engineer, pp. 38-42, March, 1998.
• [4] Thuro, K., Plinninger, R.J., “Roadheader Excavation Performance – Geological and Geotechnical Influences”, 9th ISRM Congress Paris, Theme 3: Rock Dynamics and Tectonophysics/Rock Cutting and Drilling, 25-28 August, 1999.
• [5] Göktan, R. M. and Güneş, N., “A Comperative Study of Schmidt Hammer Testing Procedure with Reference to Rock Cutting”, International Journal of Rock Mechanics & Mining Sciences, Vol. 42, pp. 466-472, 2005.
• [6] Keleş, S. ‘Cutting Performance Assessment of a Medium Weight Roadheader at Çayırhan Coal Mine’. M.Sc. Thesis, Middle East Technical University, 58p.,2005
• [7] Fowell, R.J. and McFeat-Smith, I. ‘Factors Influencing The Cutting Performance of a Selective Tunnelling Machine’. Proceedings of Tunnelling Symposium, 76. Department of Mining Engineering, University of Newcastle upon Tyne, England, 1976, p.301.
• [8] Fowell, R.J. and Pycroft, A.S. ‘Rock Machinability Studies For The Assessment of Selective Tunnelling Machine Performance’. 21st National Rock Mechanics Symp. USA, Miss.pp.149-158,1980.
• [9] Fowell, R.J. and Johnson, S.T. ‘Rock Classification and Assessment for Rapid Excavation’. Proc. Of the Symp. On Strata Mech. Newcastle Upon Tyne, pp.241-244, 1982.
• [10] Balcı, C. and Bilgin, N. ‘Mekanize Kazı Makinalarının Seçiminde Küçük ve Tam Boyutlu Kazı deneylerinin Karşılaştırılması’. İTÜ, Maden Fakültesi, Maden Mühendisliği Bölümü, Haziran 2005.
• [11] McFeat-Smith, I. ‘Correlation of Rock Properties and Tunnel Machine Performance in Selected Sedimentary Rocks’. Ph.D. Thesis, University of Newcastle upon Tyne, June 1975.
• [12] Neil, D.M., Rostami, J., Ozdemir, L. and Gertsch, R. ‘Production Estimating Techniques for Underground Mining Using Roadheaders’. SME, AIME Annual Meeting, Albuquerque, New Mexico, 1994.
• [13] Bölükbaşı, N. ‘Yeraltı Kömür ve Ayak Kazı Mekanizasyonu’, TKİ Genel Müdürlüğü Seminerleri No.4, Mining Eng.Dept. METU, Ankara, August, 1986.
• [14] Tucker, R.H., ‘Improvement of Potential in Mining Development and Tunneling Systems in the National Coal Board’.The Mining Engineer, pp.663-669, June 1985.
• [15] Schneider, H.,’Criteria for Selecting a Boom-Type Roadheading’. Mining Magazine, pp.183-187, September 1988.
• [16] Eyyuboğlu, E.M. ‘Effect of Cutting Head Design on Roadheading Machine Performance at Çayırhan Lignite Mine’. Ph.D. Thesis, METU, 145p.2000
• [17] Speight, H.E. and Fowell, R.J. ‘The Influence of Operational Parameters of Roadheader Productivity and Efficiency With Particular Reference to Cutting Pick Wear’. Dosco Overseas Engineering, Newark, University of Newcastle upon Tyne, 1984.
• [18] Fowell, R.J., Richardson G. And Gollick M.J. ‘Prediction of Boom Tunnelling Machine Excavation Rates’. Nelson pp.Laubach S.editors. Proceedings of the Symposiumon Rock Mechanics Models and Measurements Challenges form Industry,1994.p.243-51
• [19] Bilgin, N., Yazıcı, S., Eskikaya, Ş., “A Model to Predict the Performance of Roadheaders and Impact Hammers in Tunnel Drivages”, EUROCK ’96, pp. 710-721, Torino, September 2-5, 1996.