Effective usage of the diamond wire in a marble quarry is important to get high production rates and low production costs. In a quarry, cutting rate of the wire and wear of the diamond beads on wire are the performance parameters for the diamond wire cutting operation. In this study, the effects of the rock brittleness on the efficiency of diamond beads are examined by investigating cutting rate and unit wear values. Until now, the effect of the rock brittleness on diamond wire cutting has not been put forward by any researchers. Therefore, it is aimed to correlate the relationships between performance parameters and some brittleness concepts proposed by Hunca & Das (1974) (B1 and B2), Altindag (1974) (B3) and Yarali & Soyer (2011) (B4). These brittleness concepts were used to investigate the relationships between performance parameters in diamond wire cutting, which include bead wear and cutting rate, and rock brittleness. This study was performed on nine different rocks, composed of seven marble samples and two limestone samples. As a result of this study it is found out that unit wear values increase with increasing brittleness concepts B1, B2, B3 and B4. It is also found out that cutting rate values decrease with increasing brittleness concepts B1, B2, B3 and B4.
Generally, the diamond wire cutting method, as shown in Figure 1, is used in natural stone mining and decorative cutting tests, cutting and lifting basic construction structures, railway bridges, old concrete chimneys and dams (Ozcelik 1999). These are affected by numerous factors such as rock characteristics, cutting tools and equipment and working conditions. Rock cutting with minimum costs and maximum efficiency can only be possible by examining these factors carefully. Most of them have been investigated in detail by several researchers.