Akademik Veri Yönetim Sistemi
JOURNAL OF THE SOUTH AFRICAN INSTITUTE OF MINING AND METALLURGY, cilt.103, sa.8, ss.515-522, 2003 (SCI-Expanded)
The correlations between the modulus ration and the penetration rate of rotary and percussive drills were statistically investigated using the raw data obtained from the experimental works of different researchers. An inverse power law was found between the modulus ratio and the penetration rate of rotary and diamond drills. The penetration rate of rotary drills and diamond drills decrease with an increasing modulus ratio. The penetration rates of percussive drills increase with an increasing modulus ratio. There are significant linear correlations between the penetration rates of percussive drills and the modulus ratio. In one of the cases of percussive drilling, a strong correlation between the penetration rate and the modulus ratio was found for the rocks having a porosity value lower 1.23%.