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NUMERICAL STUDY OF INFLUENCE OF DEEP CORING PARAMETERS ON TEMPERATURE OF IN-SITU CORE

ABSTRACT
The In-situ coring has a significant effect on the exploration of deep earth. However, in deep hard rock coring, the cutting heat in the process of coring generates high temperature and causes fidelity distortion of the in-situ core. Exploration of the mechanism of heat effect in the coring process is necessary to achieve the continuous control of temperature and obtain in-situ core. Due to the lack of systematic study on the surface and internal temperature rise of core samples during coring process, this paper uses the finite element simulation study the heat effect on the surface of the core under the influence of various cutting parameters. The numerical simulation results show that the surface of the core will not be burned under the cutting speed of 100 mm/s. At the condition of cutting speed 100 mm/s, feed rate 0.03 mm/r, thermal conductivity coefficient 1 W/m°C, the whole temperature rise will not exceed 1°C. The interest results showed that cutting fluid has little effect on the temperature rise in the cutting process. If the requirement of core quality should avoid the pollution by drilling fluid, this study has supported the no drilling fluid for in-situ coring.
KEYWORDS
PAPER SUBMITTED: 2018-08-13
PAPER REVISED: 2018-11-11
PAPER ACCEPTED: 2019-02-01
PUBLISHED ONLINE: 2019-05-26
DOI REFERENCE: https://doi.org/10.2298/TSCI180813209W
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE 3, PAGES [1441 - 1447]
REFERENCES
  1. Pathegama, G. R., et al., Opportunities and Challenges in Deep Mining: a Brief Review, Engineering, 3(2017), 04, pp. 250-261
  2. Liu, J., et al., History, advancements, and Perspective of Biological Research in Deep-Underground Laboratories: a Brief Review, Environment International, 120(2018), 1, pp. 207-214
  3. Klotz, A. R., The Gravity Tunnel in a Non-Uniform Earth. American Journal of Physics, 83 (2015), 3, pp. 231-237
  4. Gao, M., et al., Field Experiments on Fracture Evolution and Correlations between Connectivity and Abutment Pressure under Top Coal Caving Conditions, International Journal of Rock Mechanics and Mining Science, 111(2018), 2, pp. 84-93
  5. Magagnoli, M., A New Coring Method in Deep Water, Marine Georesources & Geotechnology, 34(2016), 4, pp. 496-503
  6. Wasantha, P. L. P., et al., Do Joint Geometrical Properties Influence the Fracturing Behaviour of Jointed Rock? an Investigation through Joint Orientation, Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 1(2015), 1-2, pp. 3-14
  7. Cui, J., et al., Prediction of the Temperature of a Drill in Drilling Lunar Rock Simulant in a Vacuum, Thermal Science, 21(2017), 2, pp. 51-51
  8. Prakash, V., et al., Temperature Distribution in Synthetic Diamond Cutters during Orthogonal Rock Cutting. SPE Drilling Engineering, 4(1989), 2, pp. 137-143
  9. Che, D., et al., Analytical Modeling of Heat Transfer in Polycrystalline Diamond Compact Cutters in Rock Turning Processes, Journal of Manufacturing Science and Engineering, 137 (2015), 3, pp. 031005
  10. Shao, W., et al. , An Experimental Study of Temperature at the Tip of Point-Attack Pick during Rock Cutting Process, International Journal of Rock Mechanics and Mining Sciences, 107(2018), 3, pp. 39-47
  11. Rojek, J., Discrete Element Thermomechanical Modelling of Rock Cutting with Valuation of Tool Wear. Computational Particle Mechanics, 1(2014), 1, pp. 71-84
  12. Loui, J. P., et al., Heat Transfer Simulation in Drag-Pick Cutting of Rocks, Tunnelling & Underground Space Technology Incorporating Trenchless Technology Research, 20(2005), 3, pp. 263-270
  13. Jiang, F., et al., Estimation of Temperature-Dependent Heat Transfer Coefficients in Near-Dry Cutting, International Journal of Advanced Manufacturing Technology, 86(2016), 5-8, pp. 1207-1218
  14. Shaw M. C., Metal Cutting Principles, Clarendon Press, Oxford, 1989
  15. Chen, W. C., et al., Determination of Temperature Distributions on the Rake Face of Cutting Tools Using a Remote Method, International Communications in Heat & Mass Transfer, 24(1997), 2, pp. 161-170
  16. Johnson G. R., Cook W. H., Fracture Characteristics of Three Metals Subjected to Various Strains, Strain Rates, Temperatures and Pressures, Engineering Fracture Mechanics, 26(1985), 1, pp.31-48
  17. Gui, W. Q., High Speed Machining Technology, National Defense Industry Press, Beijing,2003

© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence