Prediction of Rock Mechanical Parameters as a Function of P-Wave Velocity
Author Affiliations
- 1Faculty of Civil Engineering, Islamic Azad University, Rudehen Branch, Rudehen, Tehran, IRAN
- 2 Department of Geophysics, Islamic Azad University, Chalous branch, Chalous, IRAN
- 3 Uppsala University, Box 534, Construction Engineering Department, SE-75121 Uppsala, SWEDEN
Int. Res. J. Earth Sci., Volume 2, Issue (9), Pages 7-14, October,25 (2014)
Abstract
Due to non destructive and easy method of P-wave velocity (V) measurements in field and laboratory conditions, and also its relation to mechanical parameters of the material, it has increasingly been conducted to determine the physical properties of rock materials. In this paper an experimental study of the measurement of P-wave velocity, uniaxial compressive strength (UCS), Schmidt hammer test (N), porosity (n), saturated and dry density () and elasticity modulus (E) for two types of rocksincluding the sandstone and schist at a selected site in West of Iran in Hamedan province were performed. According to available reports of Geological Survey of Iran (GSI), in most of areas of Zagros fault zone including our selected area, particularly in Sanandaj – Sirjan zone, the majority of rock types are consisting of sandstones and metamorphed Jurassic rocks in green schist. Therefore, in the present paper, we aim to determine reliable empirical predictive models as a function of P-wave velocity to estimate the rocks properties for these two rock types. For this purpose, 30 samples consisting of 9 schist and 21 sandstones were tested in laboratory. By application of statistical analysis and student t-test the computed regression coefficient value evaluated and showed that these obtained empirical relations can be applied for the West of Iran. To verify and validate our results a detailed comparison between results of this study by other researchers were conducted by plotting graphs. The result of comparison shows good compatibility with each other.
