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Journal of Mining Sciences

2019 year, number 6

Developing Empirical Models for Uniaxial Compressive Strength Prediction by Using Non-Destructive Test Results

M. B. Hayat1,2, D. Ali1, Ur A. Rehman1, A. Saleem3, N. Mustafa4
1Missouri University of Science & Technology, Rolla MO, 65401 USA
2University of Engineering & Technology, Lahore, 54890 Pakistan
3General Department of Mines, Lahore, 54000 Pakistan
4Dewan Cement Ltd, Karachi, 74200 Pakistan
Keywords: известняк, предел прочности на одноосное сжатие, корреляция, точечная нагрузка, молоток Шмидта, скорость продольных и поперечных волн, Limestone, uniaxial compressive strength, correlation, point load, Schmidt hammer, P-wave velocity, S-wave velocity


In the current study, uniaxial compressive strength, Schmidt hammer and Sonic velocity tests are performed on NX size rock core samples from Sakesar and Namal formation limestone. Least square regression analysis is used to develop any possible correlations between the destructive and non-destructive test results. Empirical models, for predicting the uniaxial compressive strength of rocks by using the rebound number and P-wave/S-wave velocity, have been developed and evaluated. Analysis shows that the empirical model for predicting UCS with Schmidt hammer rebound number is more reliable over a wide range of strength values for both the formations. Whereas the models that uses P-wave/S-wave velocities is reliable particularly when the strength values are low to medium.