Title: Petrophysical parameters affecting the microbit drillability of rock

Authors: T.N. Singh, Abhishek Jain, Kripamoy Sarkar

Addresses: Department of Earth Sciences, IIT Bombay, Powai 400 076, India. ' Institute of Technology, BHU, Varanasi 221005, India. ' Department of Earth Sciences, IIT Bombay Powai 400 076, India

Abstract: Drillability of rock is one of the important parameter to decide the progress and economics of excavation. It depends on number of parameters like ground condition, drill geometry and other rock parameters. The important physico-mechanical properties were determined. It was found that Uniaxial Compressive Strength, Point load index, tensile strength, shear strength, cohesion are strongly correlated with Penetration Rate (PR), however elastic modulus, P and S wave velocity indicate moderate correlation. Abrasivity does not show significant relation with PR. The |t| test was performed to verify the empirical relation which confirmed the validity of the equations. These equations can be used to predict drillability performance.

Keywords: petrophysical properties; rock drillability; t test; microbit drillability; drillability performance; drilling; physico-mechanical properties.

DOI: 10.1504/IJMME.2009.027256

International Journal of Mining and Mineral Engineering, 2009 Vol.1 No.3, pp.261 - 277

Published online: 18 Jul 2009 *

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