Approximate analytical model of rock thermal cyclical disintegration under convective cooling

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Authors:

A.Yu.Dreus, Dr. Sc. (Tech.), Assoc. Prof., orcid.org/0000-0003-0598-9287, Oles Honchar Dnipro National University, Dnipro, e‑mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

 A.A.Kozhevnykov, Dr. Sc. (Tech.), Prof., orcid.org/0000-0002-6876-4168, Dnipro University of Technology, Dnipro, Ukraine, e‑mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Baochang Liu, PhD, Prof., orcid.org/0000-0002-0185-3684, College of Construction Engineering, Jilin University, Chanchung, China, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

D.A.Sudakova, Cand. Sc. (Tech.), Assoc. Prof., orcid.org/0000-0002-8676-4006, Dnipro University of Technology, Dnipro, Ukraine, e‑mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract:

Purpose. Development of an approximate analytical method for calculating strength reduction of different rocks under thermal cycling effects, taking into account the intensity of convective heat transfer.

Methodology. To solve the problem, an analytical approach based on the thermoelasticity theory was used within the framework of the Griffiths model of fragile fracture.

Findings. It is demonstrated, that cooling of the previously heated rock formation stipulates for intensifies of the rock decomposition process, due to developing fractures zone and decreasing rock strength. Methods for calculating were developed and effect of the intensity of convective heat transfer on crack opening processes in the rock was studied. The results of calculation of destruction time lag for various rocks are presented. It is shown that the efficiency of thermal cyclic decomposition depends on the type of rock.

Originality. A new approximate analytical approach to the investigation of the development of initiated cracks in mining rocks under thermal cyclic load and cooling applied to the surface is proposed. An analytical expression has been obtained for the relationship between the parameters of the fracture process and the parameters of the cooling process. Theoretical substantiation of the use of variable thermal effects on the rock to improve the efficiency of rock destruction during drilling has been carried out.

Practical value. The outcomes of the study can be used to estimate of the parameters of the heat exchange processes to provide effective rock disintegration during drilling. The studies carried out confirmed the possibility of control of the temperature mode on the working face and thermal softening of the rock by changing the flow rate of the drilling fluid.

References.

1. Plevova, E., Vaculikova, L., Kozusnikova, A., Ritz, M., & Martynkova, G.S. (2016). Thermal expansion behaviour of granites. Journal of Thermal Analysis and Calorimetry, 123, 1555-1561. DOI: 10.1007/s10973-015-4996-z.

2. Chen, Y.-L., Wang, S.-R., Ni, J., Azzam, R., & Fernández-steeger, T.M. (2017). An experimental study of the mechanical properties of granite after high temperature exposure based on mineral characteristics. Engineering Geology, 220, 234-242. DOI: 10.1016/j.enggeo.2017.02.010, 71–74.

3. Kong, B., Wang, E., Li, Z., Wang, X., Liu, J., & Li, Nan. (2016). Fracture Mechanical Behavior of Sandstone Subjected to High-Temperature Treatment and Its Acoustic Emission Characteristics Under Uniaxial Compression Conditions. Rock Mechanics and Rock Engineering, 49(12), 4911-4918. DOI: 10.1007/s00603-016-1011-3.

4. Zhao, Z. (2016). Thermal Influence on Mechanical Properties of Granite: A Microcracking Perspective. Rock Mechanics and Rock Engineering, 49(3), 747-762. DOI: 10.1007/s00603-015-0767-1.

5. Kant, M.A., Rossi, E., Madonna, C., Höser, D., & P. Rudolf von Rohr (2017). A theory on thermal spalling of rocks with a focus on thermal spallation drilling. Journal of Geophysical Research: Solid Earth, 122, 1805-1815. DOI: 10.1002/2016JB013800.

6. Buckstegge, F., Michel, T., Zimmermann, M., Roth, S., & Schmidt, M. (2016). Advanced Rock Drilling Technologies Using High Laser Power. Physics Procedia, 83, 336-343. DOI: 10.1016/j.phpro.2016.08.035.

7. Kristofic, T., Kocis, I., Balog, T., Gajdos, M., Kocis, I., & Gelfgat, M. (2016). Well Intervention Using Plasma Technologies. In SPE Russian Petroleum Technology Conference and Exhibition, Moscow, Russia, 24–26 October 2016, SPE-182120-MS. DOI: 10.2118/182120-MS.

8. Voloshyn, O., Potapchuk, I., Zhevzhyk, O., & Zhovtonoha, M. (2018). Results of the experimental research of the heat-transfer jet pressure to the rock surface during thermal reaming of the borehole. InE3S Web of Conferences, 60, 00024. DOI: 10.1051/e3sconf/20186000024.

9. Zhang, А., Zhao, О., Hu, В., Skoczylas, А., & Shao, J. (2018). Laboratory Investigation on Physical and Mechanical Properties of Granite After Heating and Water-Cooling Treatment. Rock Mechanics and Rock Engineering, 51(3), 677-694. DOI: 10.1007/s00603-017-1350-8.

10. Hosseini, M. (2017). Effect of temperature as well as heating and cooling cycles on rock properties. Journal of Mining & Environment, 8(4), 631-644. DOI: 10.22044/jme.2017.971.

11. Zhang, H., Gao, D., Salehi, S., & Guo, B. (2014). Effect of fluid temperature on rock failure in borehole drilling, Journal Engineering Mechanics, 140, 82-90. DOI: 10.1061/(ASCE)EM.1943-7889.0000648.

12. Kozhevnykov, A., & Dreus, A. (2018). Power consumption of rock decomposition process during diamond core drilling using pulse flushing. Mining of Mineral Deposits, 12(3), 22-27. DOI: 10.15407/mining12.03.022.

13. Dreus, A.Yu., Sudakov, A.K., Kozhevnykov, A.A., & Vakhalin, Yu.N. (2016). Study on thermal strength reduction of rock formation in the diamond core drilling process using pulse flushing mode. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 2, 5-10.

14. Zhang, X.-Y., Chen, Z.-T., & Li, X.-F. (2018). Thermal shock fracture of an elastic half-space with a subsurface penny-shaped crack via fractional thermoelasticity. Acta Mechanica,229(12), 4875-4893. DOI: 10.1007/s00707-018-2252-x.

15. Shankar, V.K., Kunar, B.M., & Murthy, C.S. (2018). Experimental investigation and statistical analysis of operational parameters on temperature rise in rock drilling. International Journal of Heat and Technology, 36(4), 1174-1180. DOI: 10.18280/ijht.360403.

16. Dreus, A.Y., & Lysenko, K.Ye. (2016). Computer simulation of fluid mechanics and heat transfer processes at the working face of borehole rock. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 5, 29-35.

17. Kozhevnykov, A.O., Dreus, A.Yu., Baochang, Liu, & Sudakov, A.K. (2018). Drilling fluid circulation rate influence on the contact temperature during borehole drilling. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 1, 35-42. DOI: 10.29202/nvngu/2018-1/14.

18. Khomenko, O., Kononenko, M., & Bilegsaikhan, J. (2018). Classification of Theories about Rock Pressure. Solid State Phenomena, 277, 157-167, DOI: 10.4028/www.scientific.net/SSP.277.1.57.

19. Sdvyzhkova, О., Golovko, Y., & Klimenko, D. (2017). Theoretical substantiation of the rock outburst criterion in terms of amplitude-frequency characteristics of an acoustic signal. In Conference Proceeding 16th International Conference Geoinformatics: Theoretical and Applied Aspects, Kyiv; Ukraine; 15–17 May 2017, 129036. DOI: 10.3997/2214-4609.201701822.

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