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An Empirical Correlation of Index Geomechanical Parameters with the Compressional Wave Velocity

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Abstract

The geomechanical strength of rockmass plays a key role in planning and design of mining and civil construction projects. Determination of geomechanical properties in the field as well as laboratory is time consuming, tedious and a costly affair. In this study, density, slake durability index, uniaxial compressive strength (UCS) and P-wave velocity tests were conducted on four igneous, six sedimentary and three metamorphic rock varieties. These properties are crucial and used extensively in geotechnical engineering to understand the stability of the structures. The main aim of this study is to determine the various mechanical properties of 13 different rock types in the laboratory and establish a possible and acceptable correlation with P-wave velocity which can be determined in the field as well as laboratory with ease and accuracy. Empirical equations were developed to calculate the density, slake durability index and UCS from P-wave velocities. Strong correlations among P-wave velocity with the physical properties of different rock were established. The relations mainly follow a linear trend. Student’s ‘t’ test and ‘F’ test were performed to ensure proper analysis and validation of the proposed correlations. These correlations can save time and reduce cost during design and planning process as they represent a reliable engineering tool.

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Sarkar, K., Vishal, V. & Singh, T.N. An Empirical Correlation of Index Geomechanical Parameters with the Compressional Wave Velocity. Geotech Geol Eng 30, 469–479 (2012). https://doi.org/10.1007/s10706-011-9481-2

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  • DOI: https://doi.org/10.1007/s10706-011-9481-2

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