THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

online first only

Research on physical-mechanical properties and energy evolution characteristics of granite after high temperature treatment

ABSTRACT
Granite is the main carrier of geothermal energy of hot dry rock. Therefore, the study of influence of different temperatures on the physical-mechanical properties and energy evolution characteristics of granite after high temperature treatment is an important way to guide the successful exploitation of hot dry rock geothermal resources. Physical tests and uniaxial compression tests were carried out on granite after high temperature treatment ranging from 25 to 350ÂșC. The results show that change rates in volume, mass, density, P-wave velocity and porosity of granite increase with increasing temperature. The research results can provide basic data support for the safe and efficient development of hot dry rock in China, and also develop the theory of high temperature rock mechanics.
KEYWORDS
PAPER SUBMITTED: 2022-08-27
PAPER REVISED: 2022-11-05
PAPER ACCEPTED: 2022-11-23
PUBLISHED ONLINE: 2023-01-21
DOI REFERENCE: https://doi.org/10.2298/TSCI220827009L
REFERENCES
  1. Gao, M.Z., et al., Discing Behavior and Mechanism of Cores Extracted from Songke-2 Well at Depths below 4,500 m, International Journal of Rock Mechanics and Mining Sciences, 149 (2022), 2, Aritlce ID 104976
  2. Gao, M.Z., et al., Principle and Technology of Coring with In-situ Pressure and Gas Maintaining in Deep Coal Mine (in Chinese), Journal of China Coal Society, 46.(2021), 3, pp. 885-897
  3. Gao, M.Z., et al., Calculating Changes in Fractal Dimension of Surface Cracks to Quantify How the Dynamic Loading Rate Affects Rock Failure in Deep Mining, Journal of Central South University, 27.(2020), 10, pp. 3013-3024
  4. Yang, B.G., et al., Exploration of Weakening Mechanism of Uniaxial Compressive Strength of Deep Sandstone under Microwave Irradiation, Journal of Central South University, 29.(2022), 2, pp. 611-623
  5. Gao, M.Z., et al., In-situ Disturbed Mechanical Behavior of Deep Coal Rock (in Chinese), Journal of China Coal Society, 45.(2020), 8, pp. 2691-2703
  6. Kumari, W.G.P., et al., Hydraulic Fracturing under High Temperature and Pressure Conditions with Micro CT Applications: Geothermal Energy from Hot Dry Rocks, Fuel, 230.(2018), 4, pp. 138-154
  7. Sun, Z.X., et al., Numerical Simulation of the Heat Extraction in EGS with Thermal-Hydraulic-Mechanical Coupling Method Based on Discrete Fractures Model, Energy, 120.(2017), 2, pp. 20-33
  8. Wang, H., et al., Coupling Characteristics of Meso-Structure and Thermophysical Parameters of Deep Granite under High Geo-Temperature, Thermal Science, 25.(2021), 6, pp. 4621-4629
  9. Yang, S.Q., et al., An Experimental Investigation on Thermal Damage and Failure Mechanical Behavior of Granite after Exposure to Different High Temperature Treatments, Geothermics, 65 (2017), 2, pp. 180-197
  10. Zhang, J.Y., et al., Inconsistency of Changes in Uniaxial Compressive Strength and P-wave Velocity of Sandstone after Temperature Treatments, Journal of Rock Mechanics and Geotechnical Engineering, 13.(2021), 1, pp. 143-153
  11. Gao, M.Z., et al., Characteristics and Mechanism of Rock 3D Volume Fracturing in Microwave Field (in Chinese), Journal of China Coal Society, 47.(2022), 3, pp. 1122-1137
  12. Gao, M.Z., et al., The Mechanism of Microwave Rock Breaking and Its Potential Application to Rock-Breaking Technology in Drilling, Petroleum Science.19.(2022), 3, pp. 1110-1124
  13. Gautam, P.K., et al., Evolution of Thermal Damage Threshold of Jalore Granite, Rock Mechanics and Rock Engineering, 51.(2018), 9, pp. 2949-2956
  14. Freire-Lista, D.M., et al., Thermal Stress-Induced Microcracking in Building Granite, Engineering Geology, 206.(2016), pp. 83-93
  15. Rossi, E., et al., The Effects of High Heating Rate and High Temperature on the Rock Strength: Feasibility Study of a Thermally Assisted Drilling Method, Rock Mechanics and Rock Engineering, 51.(2018), 9, pp. 2957-2964
  16. Zhang, Y., et al., Influence of Temperature on Physical and Mechanical Properties of a Sedimentary Rock: Coal Measure Mudstone, Thermal Science, 25.(2021), 1, pp. 159-169
  17. Luo, N., et al., Temperature Dependence of Young's Modulus of Red Sandstone, Thermal Science, 23.(2019), 3, pp. 1599-1606
  18. Qiao, L., et al., Influence of Temperature on the Transformation and Self-Control of Energy during Sandstone Damage: Experimental and Theoretical Research, International Journal of Mining Science and Technology, 32.(2022), 4, pp. 761-777
  19. Ai, T., et al., Changes in the Structure and Mechanical Properties of a Typical Coal Induced by Water Immersion, International Journal of Rock Mechanics and Mining Sciences, 138, (2021), 2, Article ID 104597
  20. 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, 31.(2021), 5, pp. 825-841