20th International Mining Congress and Exhibition of Turkey (IMCET 2007) -- JUN 06-08, 2007 -- Ankara, TURKEYWOS: 000248289300021In this study, unaxial compressive strength, indirect (Brazilian) tensile strength and dirilling rate index (DRI) have been carried out on the rock samples colected 16 different area. The drilling rate index of rocks was assessed on the basis of two laboratory tets, the brittleness test and Sievers' miniature drill test. Three brittleness concepts, which are used two brittlenes measurements acceppted (B1, 132) in literature, together with a new brittleness concept (B3) were used in order to determine of brittleness of rocks. A meaningful relationships between the measuring brittleness of B1 and B2 and drilling rate index were not found. A exponential relationship between brittleness of B3 and drilling rate index was found. The effect of brittleness on drillability can be clearly observationed by the time the third brittleness concept uses in drillability analyses.Sci & Technol Res Council Turkey, Turkish Coal Enterprises, Eti Mine Works Gen Management, Turkish Hardcoal Enterprises, Yildizlar Holding, Black Sea Copper Works, Eti Copper Corp, Dedeman Holding, Chamber Mining Engineers Turke
