THERMAL SCIENCE

International Scientific Journal

Huan Wang

,

Shuang You

,

Hong-Guang Ji

,

Hui-Ci Xu

,

Qi Li

,

Hu-Zhen Li

COUPLING CHARACTERISTICS OF MESO-STRUCTURE AND THERMOPHYSICAL PARAMETERS OF DEEP GRANITE UNDER HIGH GEO-TEMPERATURE

ABSTRACT
Polarizing microscope, nuclear magnetic resonance, and thermal constant analyzer were used to test the granite samples in the depth of 1500-2000 m in San­shandao before and after the heat treatment and be carried out to study the cor­responding relationship between rock meso-structure characteristics and different geothermal temperature circumstances, and the influence of thermal cycling on rock meso-structure. Tests results present that the porosity, pore size distribution, thermal conductivity and specific heat capacity are significantly affected by the environment where the rock occurs, mineral composition and particle size, and the increase in porosity and water content will cause the thermal conductivity and specific heat capacity to decrease.
KEYWORDS
deep granite, geo-temperature, meso-structure, thermal properties, laboratory test
PAPER SUBMITTED: 2021-01-01
PAPER REVISED: 2021-03-10
PAPER ACCEPTED: 2021-04-20
PUBLISHED ONLINE: 2021-12-24
DOI REFERENCE: https://doi.org/10.2298/TSCI2106621W
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 6, PAGES [4621 - 4629]
REFERENCES
  1. Teng, J. W., et al., Analysis of ChineseCoal Demand, Exploration Potential and Efficient Utilization, Chinese Journal of Geophysics, 59 (2016), 12, pp. 4633-4653
  2. Xie, H. P., et al., Research and Exploration of Deep Rock Mass Mechanics, Chinese Journal of Rock Mechanics and Engineering, 34 (2015), 11, pp. 6-23
  3. Peng, K., et al., Evolutionary Characteristics of Mode-I Fracture Toughness and Fracture Energy in Granite from Different Burial Depths under High-Temperature Effect, Engineering Fracture Mechanics, 239 (2020), 7, ID107306
  4. Gao, M. Z., et al., Principle and Technology of Coring with in-situ Pressure and Gasmaintaining in Deep Coal Mine, Journal of China Coal Society, 46 (2021), 3, pp. 885-897
  5. Xie, H. P., et al., Several Disruptive Technical Ideas and Research Directions in the Field of Deep Science, Advanced Engineering Sciences, 49 (2017), 1, pp. 1-8
  6. Nasseri, M. H. B., et al., Coupled Evolution of Fracture Toughness and Elastic Wave Velocities at High Crack Density in Thermally Treated Westerly Granite, International Journalof Rock Mechanics and Mining Sciences, 44 (2007), 5, pp. 601-616
  7. Gan, F., et al., Effect of Thermal Cycling-Dependent Cracks on Physical and Mechanical Properties of Granite for Enhanced Geothermal System, International Journal of Rock Mechanics and Mining Sciences, 134 (2020), 5, ID104476
  8. Zhou, X. P., et al., Real-Time Experiment Investigations on the Coupled Thermomechanical and Cracking Behaviors in Granite Containing Three Pre-Existing Fissures, Engineering Fracture Mechanics, 224 (2020), 4, ID106797
  9. Wang, F., et al., Influence of Repeated Heating on Physical-Mechanical Properties and Damage Evolution of Granite, International Journal of Rock Mechanics and Mining Sciences, 136 (2020), 5, ID104514
  10. Avanthi, B. L. I., et al., Quantification of Thermally-induced Microcracks in Granite Using X-ray CT Imaging and Analysis, Geothermics, 81 (2019), 7, pp. 152-167
  11. Gautam., P. K., et al., Effect of High Temperature on Physical and Mechanical Properties of Jalore Granite, Journal of Applied Geophysics, 159 (2018), 6, pp. 460-474
  12. Gautam, P. K., et al., Experimental Investigations on the Thermal Properties of Jalore Granitic Rocks for Nuclear Waste Repository, Thermochimica Acta, 681 (2019), 7, ID178381
  13. Fan, L. F., et al., An Investigation of Thermal Effects on Micro-properties of Granite by X-Ray CT Technique, Applied Thermal Engineering, 140 (2018), 5, pp. 505-519
  14. Yu, B. P., et al., Experimental Study on High Temperature Thermal Damage Mechanical Properties of Granite in Gonghe Basin, Qinghai, Chinese Journal of Rock Mechanics and Engineering, 39 (2020), 1, pp. 69-83
  15. Kun, W., et al., Application of Nuclear Magnetic Resonance Technology in Rock Physics and Characterization of Pore Structure, Chinese Journal of Scientific Instrument, 41 (2020), 2, pp. 101-114
  16. Sun, Z. G., et al., Research on Thermal Damage of Beishan Granite Based on Low-Field Magnetic Resonance, Journal of China Coal Society, 45 (2020), 3, pp. 1081-1088
  17. Jing, A. B., et al., Influence of Different Cooling Conditions on Physical and Mechanical Properties of High Temperature Sandstone, Rock and Soil Mechanics, 11 (2020), 4, pp. 1-10
  18. Gao, M. Z., et al., The Location Optimum and Permeability-Enhancing Effect of a Low-Level Shield Rock Roadway, Rock Mechanics and Rock Engineering, 51 (2018), 9, pp. 2935-2948
  19. Gao, M. Z., et al., Mechanical Behavior of Coal under Different Mining Rates: A Case Study from Laboratory Experiments to Field Testing, International Journal of Mining Science and Technology, 7645 (2021), 7, pp. 78-100
PDF VERSION [DOWNLOAD]
Coupling characteristics of meso-structure and thermophysical parameters of deep granite under high geo-temperature

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, 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