Faculty Publications
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Item Investigation on rock thermal properties in Godavari Valley Coalfield, Telangana, India(CRC Press/Balkema, 2024) Dileep, G.; Tripathi, A.K.; Murthy, Ch.S.N.; Ray, L.The study of thermal properties provides significant contributions to the field of geothermal research, material characterization, geological assessments and optimization of heat load in underground mines. The research focuses on the examination of thermal properties in rocks, specifically sandstone, aiming to explore the correlation between thermal properties with density and porosity. The investigation on sandstone rocks within the Godavari coal basin coal mines employed a steady-state instrument to measure thermal properties. The rocks exhibit notable variations in thermal conductivity (ranging from 1.10-4.38 W/m.K) and thermal diffusivity (ranging from 0.63-1.96 J/kg.K), which are substantially influenced by changes in both porosity (ranging from 0.6-19%) and density (ranging from 2.13-2.68 g/cm3). The research findings indicate that in sandstone rocks, thermal conductivity and thermal diffusivity rise with increasing density and decline with porosity. In contrast, the specific heat capacity of rocks remains constant. © 2024 The Author(s).Item A review study of thermal conductivity and influencing physico-mechanical properties of rocks(Inderscience Publishers, 2023) Dileep, G.; Tripathi, A.K.; Murthy, C.S.N.; Pal, S.K.Geothermal exploration and heat flow studies rely heavily on rock's thermal conductivity, and it controls the subsurface temperature distribution. A broad study of rock thermal properties has become progressively indispensable for geotechnical, civil, mining, and tunnel engineers. The thermal properties of rocks are essential to the ground modification technique of geothermal heat pumps, environmentally conscious projects like dumping high-level nuclear waste in underground sites, and a wide range of engineering projects. The steady-state technique is commonly employed for homogeneous materials, providing a more precise thermal conductivity value despite longer testing times. Conversely, the transient technique is preferred for heterogeneous materials with moisture content, considering this factor but requiring multiple tests to achieve accurate results. This paper explores the predominant approaches used to measure rock thermal conductivity and identify the factors that influence it. Additionally, researchers present a generic equation for predicting the thermal conductivity of rocks using data they have gathered. According to this article, the thermal conductivity of rocks is influenced by several factors such as porosity, density, pressure, moisture content, variations in mineral composition, temperature, and more. © 2023 Inderscience Enterprises Ltd.Item Prediction of thermal conductivity of quartz chlorite schist rocks: a comparative study of MLR and ridge regression(Inderscience Publishers, 2025) Tripathi, A.K.; Pal, S.K.; Dileep, G.; Raj, A.Thermal conductivity is a key physical property with broad applications in engineering and geosciences, particularly in energy-efficient building design, geothermal energy systems, and subsurface geological studies. Accurate determination of thermal conductivity is essential for understanding heat transfer mechanisms in rock materials. However, direct in-situ measurement is often impractical due to technical and logistical constraints. As a result, indirect estimation methods, which establish empirical relationships between thermal conductivity and various physico-mechanical properties, have gained attention. This study investigates the thermal conductivity of quartz chlorite schist through laboratory experiments, alongside measuring key physico-mechanical properties, including P-wave velocity, porosity, density, and uniaxial compressive strength (UCS). The objective is to analyse the correlations between thermal conductivity and these properties to develop a reliable predictive model. Multiple regression and ridge regression analysis are employed to derive an empirical equation for estimating thermal conductivity based on the measured parameters. The findings of this study contribute to improving indirect assessment techniques, which are valuable for geotechnical and geological applications where direct measurements are challenging. © © 2025 Inderscience Enterprises Ltd.Item Thermal Conductivity Assessment in Limestone Rocks: Unveiling Patterns through P-Wave Velocity, Uniaxial Compressive Strength and Mineral Composition(World Researchers Associations, 2025) Dileep, G.; Kumar, T.A.; Murthy, C.S.N.; Labani, R.; Kumar, P.S.Rock thermal conductivity is a critical property in the building and construction industry, playing a key role in optimizing energy efficiency. It guides material selection for insulation and ensures effective resistance to heat transfer within structures. This study introduces an alternative approach for estimating the thermal conductivity of rocks using an indirect method. The proposed approach leverages P-wave velocity, uniaxial compressive strength and mineral composition as predictive parameters. This study examines the relationship between thermal conductivity and key rock properties, including P-wave velocity, uniaxial compressive strength and quartz content. A significant positive correlation was identified, highlighting the potential of these parameters as reliable predictors for estimating the thermal conductivity of rocks. © 2025, World Researchers Associations. All rights reserved.