Geomechanics and Engineering

  • 제11권5호
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  • Pages.657-670
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  • 2016
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Investigation on energy dissipation and its mechanism of coal under dynamic loads

  • Feng, Junjun (Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology) ;
  • Wang, Enyuan (Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology) ;
  • Shen, Rongxi (Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology) ;
  • Chen, Liang (Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology) ;
  • Li, Xuelong (Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology) ;
  • Xu, Zhaoyong (Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology)
  • 투고 : 2015.12.02
  • 심사 : 2016.06.10
  • 발행 : 2016.11.25
⟨ 이전 논문 다음 논문 ⟩

초록

The energy dissipation of coal under dynamic loads is a major issue in geomechanics and arising extensive concerns recently. In this study, dynamic loading tests of coal were conducted using a split Hopkinson pressure bar (SHPB) system, the characteristics of dynamic behavior and energy dissipation of coal were analyzed, and the mechanism of energy dissipation was discussed based on the fracture processes of coal under dynamic loads. Experimental results indicate that the energy dissipation of coal under dynamic loads has a positive linear correlation with both incident energy and dynamic compressive strength, and the correlation coefficients between incident energy, dynamic compressive strength and the energy dissipation rate are 0.74 and 0.98, respectively. Theoretical analysis demonstrates that higher level of stress leads to greater energy released during unstable crack propagation, thus resulting in larger energy dissipation rate of coal under dynamic loads. At last, a semi-empirical energy dissipation model is proposed for describing the positive relationship between dissipated energy and stress.

키워드

과제정보

연구 과제 주관 기관 : Chinese Ministry of Education, National Natural Science Foundation of China, China University of Mining and Technology

참고문헌

  1. Aydin, A. (2014), "Upgraded ISRM suggested method for determining sound velocity by ultrasonic pulse transmission technique", Rock. Mech. Rock. Eng., 47(1), 255-259. https://doi.org/10.1007/s00603-013-0454-z
  2. Bieniawski, Z.T. (1968), "Fracture dynamics of rock", Int. J. Fract., 4(4), 415-430.
  3. Bieniawski, Z.T. and Bernede, M.J. (1979), "Suggested methods for determining the uniaxial compressive strength and deformability of rock materials", Int. J. Rock. Mech. Min., 16(4), 137-140.
  4. Chen, W.W. and Song, B. (2010), Split Hopkinson (Kolsky) Bar: Design, Testing and Applications, Springer, New York, NY, USA.
  5. Davies, E.D.H. and Hunter, S.C. (1963), "The dynamic compression testing of solids by the method of the split hopkinson pressure bar", J. Mech. Phys. Solids, 11(3), 155-179. https://doi.org/10.1016/0022-5096(63)90050-4
  6. Freund, L.B. (1998), Dynamic Fracture Mechanics, Cambridge University Press, Cambridge, UK.
  7. Gaziev, E. (2001), "Rupture energy evaluation for brittle materials", Int. J. Solids. Struct., 38(42-43), 7681-7690. https://doi.org/10.1016/S0020-7683(01)00037-3
  8. Hong, L., Zhou, Z.L., Yin, T.B., Liao, G.Y. and Ye, Z.Y. (2009), "Energy consumption in rock fragmentation at intermediate strain rate", J. Cent. South Univ. Technol., 16(4), 677-682. https://doi.org/10.1007/s11771-009-0112-5
  9. Huang, D. and Li, Y.R. (2014), "Conversion of strain energy in triaxial unloading tests on marble", Int. J. Rock. Mech. Min., 66(2), 160-168.
  10. Li, M., Mao, X., Lu, A., Tao, J., Zhang, G., Zhang, L. and Li, C. (2014), "Effect of specimen size on energy dissipation characteristics of red sandstone under high strain rate", Int. J Min. Sci. Technol., 24(2), 151-156. https://doi.org/10.1016/j.ijmst.2014.01.002
  11. Liu, J.Z., Xu, J.Y., Lv, X.C., Zhao, D.H. and Leng, B.L. (2012), "Experimental study on dynamic mechanical properties of amphibolites, sericite-quartz schist and sandstone under impact loadings", Int. J. Nonlinear Sci. Numer. Simul., 13(2), 209-217.
  12. Lundberg, B. (1976), "A split Hopkinson bar study of energy absorption in dynamic rock fragmentation", Int. J. Rock. Mech. Min., 13(6), 187-197. https://doi.org/10.1016/0148-9062(76)91285-7
  13. Peng, R.D., Ju, Y., Wang, J.G., Xie, H.P., Gao, F. and Mao, L.T. (2015), "Energy dissipation and release during coal failure under conventional triaxial compression", Rock. Mech. Rock. Eng., 48(2), 509-526. https://doi.org/10.1007/s00603-014-0602-0
  14. Song, D.Z., Wang, E.Y. and Liu, J. (2012), "Relationship between EMR and dissipated energy of coal rock mass during cyclic loading process", Safety Sci., 50(4), 751-760. https://doi.org/10.1016/j.ssci.2011.08.039
  15. Song, D., Wang, E., Li, Z., Liu, J. and Xu, W. (2015), "Energy dissipation of coal and rock during damage and failure process based on EMR", Int. J Min. Sci. Technol., 25(5), 787-795. https://doi.org/10.1016/j.ijmst.2015.07.014
  16. Sufian, A. and Russell, A.R. (2013), "Microstructural pore changes and energy dissipation in Gosford sandstone during pre-failure loading using X-ray CT", Int. J. Rock. Mech. Min., 57(1), 119-131.
  17. Wasantha, P.L.P., Ranjith, P.G. and Shao, S.S. (2014), "Energy monitoring and analysis during deformation of bedded-sandstone: Use of acoustic emission", Ultrasonics, 54(1), 217-226. https://doi.org/10.1016/j.ultras.2013.06.015
  18. Whittles, D.N., Kingman, S., Lowndes, I. and Jackson, K. (2006), "Laboratory and numerical investigation into the characteristics of rock fragmentation", Miner. Eng., 19(14), 1418-1429. https://doi.org/10.1016/j.mineng.2006.02.004
  19. Xie, H.P., Li, L.Y., Ju, Y., Peng, R.D. and Yang, Y.M. (2011), "Energy analysis for damage and catastrophic failure of rocks", Sci. China-Technol. Sci., 54(Suppl. 1), 199-209. https://doi.org/10.1007/s11431-011-4639-y
  20. Yang, L., Yang, R., Qu, G. and Zhang, Y. (2014), "Caustic study on blast-induced wing crack behaviors in dynamic-static superimposed stress field", Int. J Min. Sci. Technol., 24(4), 417-423. https://doi.org/10.1016/j.ijmst.2014.05.001
  21. Zhang, Q.B. and Zhao, J. (2014), "A review of dynamic experimental techniques and mechanical behaviour of rock materials", Rock. Mech. Rock. Eng., 47(4), 1411-1478. https://doi.org/10.1007/s00603-013-0463-y
  22. Zhang, Z.X., Kou, S.Q., Jiang, L.G. and Lindqvist, P.A. (2000), "Effects of loading rate on rock fracture: fracture characteristics and energy partitioning", Int. J. Rock. Mech. Min., 37(7), 745-762. https://doi.org/10.1016/S1365-1609(00)00008-3
  23. Zhou, Y.X., Xia, K., Li, X.B., Li, H.B., Ma, G.W., Zhao, J., Zhou, Z.L. and Dai, F. (2012), "Suggested methods for determining the dynamic strength parameters and mode-I fracture toughness of rock materials", Int. J. Rock. Mech. Min., 49(1), 105-112. https://doi.org/10.1016/j.ijrmms.2011.10.004

피인용 문헌

  1. Energy dissipation rate: An indicator of coal deformation and failure under static and dynamic compressive loads 2018, https://doi.org/10.1016/j.ijmst.2017.11.006
  2. Experimental research on the electromagnetic radiation (EMR) characteristics of cracked rock 2017, https://doi.org/10.1007/s11356-017-1012-0
  3. Quantitative Evaluation Methods of Brittle Failure Characteristics of Coal: A Case Study of Hard Coal in China pp.1573-1529, 2018, https://doi.org/10.1007/s10706-018-0696-3
  4. Numerical Research on Energy Evolution and Burst Behavior of Unloading Coal–Rock Composite Structures pp.1573-1529, 2018, https://doi.org/10.1007/s10706-018-0609-5
  5. The Dynamic Damage Mechanisms and Failure Modes of Coal-Rock Masses under the Action of High Order P-Waves vol.2018, pp.1875-9203, 2018, https://doi.org/10.1155/2018/5386123
  6. Effects of axial static stress and confining pressure on the dynamic compressive behaviours of granite pp.2116-7214, 2021, https://doi.org/10.1080/19648189.2018.1547665
  7. Effect of Nonparallel End Face on Energy Dissipation Analyses of Rocklike Materials Based on SHPB Tests vol.2019, pp.None, 2016, https://doi.org/10.1155/2019/2040947
  8. Determination of Holmquist-Johnson-Cook Constitutive Parameters of Coal: Laboratory Study and Numerical Simulation vol.7, pp.6, 2016, https://doi.org/10.3390/pr7060386
  9. Study on the Dynamic Response Characteristics of Cylindrical Coal-Rock Samples under Dynamic Loads vol.2020, pp.None, 2020, https://doi.org/10.1155/2020/8820316
  10. STUDY ON COAL FRACTOGRAPHY UNDER DYNAMIC IMPACT LOADING BASED ON MULTIFRACTAL METHOD vol.28, pp.1, 2016, https://doi.org/10.1142/s0218348x20500061
  11. Investigations of Damage Characteristics in Rock Material Subjected to the Joint Effect of Cyclic Loading and Impact vol.13, pp.9, 2020, https://doi.org/10.3390/en13092154
  12. Dynamic Mechanical Characteristics of Impact Rock under the Combined Action of Different Constant Temperatures and Static and Dynamic Loads vol.2021, pp.None, 2021, https://doi.org/10.1155/2021/8484391
  13. Fragmentation Characteristic and Energy Dissipation of Coal under Impact Load vol.21, pp.5, 2016, https://doi.org/10.1061/(asce)gm.1943-5622.0002007