DRUG BIT CUTTING TRACE IMAGE COLOURS AND CUTTING FORCE FLUCTUATION RELATION

Abstract

Rock cutting is developing area in mining and tunnelling sectors. In order to open an

excavation inside or surface of the rock masses, they should be dig up to obtain required engineered

volume. Beside the conventional blasting methods result in total breakage of the selected parts of rock

masses, rock cutting machineries are used in some engineering projects which they have cutting bits to

trim the rock masses into small chips. Drag bits, as a type, is one of the bit kinds which researchers have

analysed for its design parameters for different rock masses. When rock bit cutting performances are

under consideration, laboratory cutting tests are performed and rocks are cut with different bit profiles

to evaluate its design parameters. In these researches cutting traces have mostly been photographed for

test file data. It was realised here in this research and analyzed some of these images for their colour

properties. Different coloured sectors were determined along the selected cutting trace images which

were compared also with the cutting force records of the related cutting tests. The colour distribution

and colour difference areas of the trace images were then analysed with the cutting actions and rock

mass features. The resultant enhanced coloured images and cutting forces fluctuation data obtained

during cutting tests of drag bits showed that colour analysed can also be the indicators of cutting

performance if they are carefully appraised.

Keywords

• Rock cutting tests
• Cutting traces
• Drag bits cutting traces
• Colour analyses

Kama Keskinin Oluşturduğu İzlerdeki Renkler ve Kesme Sırasında Ölçülen Kesme Kuvvetiyle İlişkisi

Öz

Maden ve tünel kazı aşamalarında, kaya kesme çalışmaları üzerinde araştırma yapılan konular arasındadır. Kayaçların içinde veya üzerinde herhangi bir mühendislik uygulaması için bir boşluk

oluşturulacaksa, orada kaya kütlesinin parçalara ayrılarak boşaltılması gerekecektir. Kayaçları istenen boyutlara göre tamamen parçalayarak kazılması işlemlerini içeren klasik patlatma-yükleme-taşıma sistemine karşılık kazıcı makinelerin keski uçlarıyla kayayı çentikleyerek sürekli kazması ve otomatik olarak yüklemesine bağlı mekanizasyon sistemleri de geliştirilmiştir. Bu uygulamalarda kullanılan keski uçlarının hangi kaya kütlelerinde daha verimli olduğunun araştırılması uçların tasarım parametrelerinin belirlenmesinde önemlidir. Bu çalışmalarda, keski izlerinin fotoğrafları veri olarak arşivlenen sonuçlardandır. Bu araştırma kapsamında, kama keski uçlarının kullanıldığı kesme deneylerinde ortaya çıkan keski izleri üzerinde renk analizleri yapılmıştır. Keski izlerinde belirlenen renk öbeklenmeleriyle, bu kesme deneyleri sırasında ölçülen kesme kuvveti değişimleri karşılaştırılarak değerlendirilmiştir. Ölçülen ve grafiği çizilen kesme kuvveti değişimleriyle, keski izlerinde belirlenen renk farklılıklarının belirli ölçüde uyum içinde olduğu ve keski izlerinde belirlenecek renk öbeklenme ve kodlamalarının kesme performansı hakkında fikir verebileceği değerlendirmesi yapılmıştır.

Anahtar Kelimeler

• Kaya kesme deneyleri
• Keski izleri
• Kama keski izi
• Renk analizi

Kaynakça

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