Abdullah UYSAL, Hakan ÖZŞEN, Arif Emre DURSUN

KAYAÇLARIN S20 KIRILGANLIK İNDEKSİ İLE SCHMIDT SERTLİĞİ ARASINDAKİ İLİŞKİNİN İSTATİSTİKSEL OLARAK BELİRLENMESİ

Kayaçların kırılganlığının belirlenmesi farklı madencilik uygulamalarında önemli bir ön tasarımaracı olarak kabul edilmektedir. Kırılganlık değeri kayaçların kazısında ve delinebilirliğinde kullanılanönemli bir kaya parametresidir. Schmidt çekici sertliği ise kayaların dayanım, kesilebilirlik (doğrusal vedairesel) ve delinebilirlik gibi mekanik özelliklerini belirlemek için yaygın olarak kullanılan ucuz vekolaylık sağlayan bir yüzey sertliği ölçüsüdür. Bu çalışmada, kayaçların kırılganlık değerlerinibelirlemek için Blindheim ve Bruland’ın (1998) geliştirdiği S20 kırılganlık indeksinin NTNU modelikullanılmıştır. Burada amaç, kayaçların S20 kırılganlık indeksi ile Schmidt sertliği (RL) değerleriarasındaki ilişkinin istatistiksel olarak araştırılarak yeni bir tahmin yöntemi geliştirmesidir. Bunun için,farklı dayanım özelliklerine sahip 7 farklı kayaç numunesi üzerinde S20 kırılganlık indeks deneyi ileSchmidt çekici sertlik deneyleri yapılmıştır. Schmidt çekici sertliği değerleri ile S20 kırılganlık indeksideğerleri “SPSS” programı yardımıyla istatistiksel olarak değerlendirilmiş ve korelasyon yapılmıştır. Budeğerlendirme sonucunda Schmidt çekici sertliği değerleri ile S20 kırılganlık indeksi değerleri arasındayüksek korelasyonlu bir ilişki olduğu belirlenmiştir.

Determining the Statistical Relationship between the S20 Brittleness Index and Schmidt Hardness of Rocks

Determination of the brittleness of rocks is considered as an important preliminary design tool in different mining applications. The brittleness value is an important rock parameter used in the excavation and drilling of rocks. Schmidt's hardness is an inexpensive and easy-to-use surface hardness measure that is commonly used to determine the mechanical properties of rocks, such as strength, cuttability (linear and circular), and permeability. In this study, the S20 brittleness index values were determined by using NTNU model to determine the brittleness values of the rocks which were developed by Blindheim and Bruland (1998). The aim of this study was to investigate the relationship between the S20 brittleness index and Schmidt hardness (RL) values statistically. For this purpose, Schmidt hardness tests and S20 brittleness index tests on 7 different rock samples with different strength properties were performed. Schmidt hardness test values and S20 brittleness index values were statistically evaluated and correlated with SPSS. As a result of this evaluation, it was determined that there was a strong correlation between Schmidt hardness and S20 brittleness index values.

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