Evaluation of the sawability of block-cutting (S/T) and gangsaw machines used in production of the sedimentary and metamorphic origin natural stones

Abstract

The natural stone sector in Türkiye has developed significantly in recent years and it is seen that enterprises are tried to use modern production methods and techniques with large investments. When these production methods used in factories and quarries are investigated, it is seen that especially diamond wire cutting, chain saw machines, circular saw block cutting (S/T) and gang saw machines come to the fore. These machines due to high productivity, production and profit rates are more preferred by companies in the natural stone quarries. In this study, natural stones with sedimentary and metamorphic origin were obtained from a natural stone enterprise in Denizli. Then, some important physical-mechanical properties of these samples are determined by performing rock mechanics experiments. Finally, new empirical models are proposed for the estimation of the areal slab production rate (ASPR) of the S/T and gang saw machines used in the natural stone enterprise. This study shows that uniaxial compressive strength, indirect tensile strength, Cerchar abrasivity index and density properties of natural stones can be used to estimate sawing performance of S/T and gang saw machines. In addition, the reliability of the proposed models is compared with other models in the literature. This study should be continued to develop more generalized and reliable estimation models especially by adding natural stones of different origin and with different physical-mechanical properties to the database.

Keywords

• Natural stone
• Block-cutting machine
• Gangsaw machine
• Sawability
• Modeling

Sedimanter ve metamorfik kökenli doğal taşların üretiminde kullanılan blok kesme (S/T) ve katrak makinelerinin kesilebilirliğin değerlendirilmesi

Öz

Türkiye’de doğal taş sektörü son yıllarda önemli derecede gelişmiş ve işletmelerin büyük yatırımlar ile modern üretim yöntemlerine ve tekniklerine yöneldiği görülmektedir. Fabrika ve ocaklarda kullanılan üretim yöntemlerine bakıldığında özellikle elmas boncuklu tel kesme, zincirli kollu kesme, dairesel testereli blok kesme (S/T) ve katrak makinelerinin ön plana çıktığı görülmektedir. Yüksek verimlilik, üretim ve kar oranlarına sahip bu makineler firmalar tarafından daha çok tercih edilmektedir. Bu çalışmada Denizli’de bulunan bir doğal taş işletmesinden sedimanter ve metamorfik kökenli doğal taşlar elde edilmiştir. Daha sonra bu örnekler üzerinde kaya mekaniği deneyleri yapılarak bazı önemli fiziksel-mekanik özellikler belirlenmiştir. Sonunda işletmede kullanılan S/T ve katrak makinelerinin alansal plaka üretim oranı (APÜO) tahmininde kullanılabilecek ampirik modeller önerilmiştir. Yapılan analizler sonucunda doğal taşların tek eksenli basınç dayanımı, Cerchar aşındırıcılık indeksi, dolaylı çekme dayanımı ve yoğunluk özellikleri S/T ve katrak makinelerinin kesme performansının tahmini için kullanılabilirliğini göstermiştir. Ayrıca, önerilen modellerin güvenilirliği literatürde bulunan diğer modellerle kıyaslanmıştır. Bu çalışma, farklı kökenli ve farklı fiziksel-mekanik özelliklere sahip doğal taşların veri tabanına ekleyerek daha genel ve güvenilir tahmin modelleri geliştirmek için sürdürülmelidir.

Anahtar Kelimeler

• Doğal Taş
• Blok Kesme Makinesi
• Katrak Makinesi
• Kesilebilirlik
• Modelleme

Kaynakça

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