Geomechanics and Engineering

  • 제23권6호
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  • Pages.535-546
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  • 2020
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Study on the mechanical properties and rheological model of an anchored rock mass under creep-fatigue loading

  • Song, Yang (Department of Architecture and Transportation, Liaoning Technical University) ;
  • Li, Yong qi (Department of Civil Engineering, Liaoning Technical University)
  • 투고 : 2020.10.10
  • 심사 : 2020.12.14
  • 발행 : 2020.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

The stress environment of deep rock masses is complex. Under the action of earthquakes or blasting, the strength and stability of anchored rock masses in fracture zones or faults are affected. To explore the variation in anchored rock masses under creep-fatigue loading, shear creep comparative testing of anchored marble specimens with or without fatigue loading is performed. Considering the damage variable of rock under fatigue loading, a rheological model is established to characterize the whole shear creep process of anchored rock masses under creep-fatigue loading. The results show that (1) the overall deformation of marble under creep-fatigue loading is larger than that under only shear creep loading, and the average deformation is increased by 18.3%. (2) By comparing the creep curves with and without fatigue loading, the two curves basically coincide when the first level stress is applied, and the two curves are stable with the increase in stress level. The results show that the strain difference among the specimens increases gradually in the steady-state stage and reaches the maximum at the fourth level. (3) The shear creep is described by considering the creep mechanical properties of anchored rock masses under fatigue loading. The accuracy of this creep-fatigue model is verified by laboratory tests, and the applicability of the model is illustrated by the fitting parameter R2. The proposed model provides a theoretical basis for the study of anchored rock masses under low-frequency earthquakes or blasting and new methods for the stability and reinforcement of rock masses.

키워드

과제정보

The research described in this paper was financially supported by the National Natural Science Foundation (51974146), Liaoning Natural Science Foundation (2019-ZD-0042) and Discipline Innovation team of Liaoning Technical University (LNTU20TD08).

참고문헌

  1. Ajamzadeh, M., Sarfarazi, V. and Dehghani, H. (2019), "Evaluation of plow system performance in long-wall mining method using particle flow code", Int. J. Coal Sci. Technol., 6(4), 518-535. https://doi.org/10.1007/s40789-019-00266-3.
  2. Bagde, M.N. and Petros, V. (2005), "Waveform effect on fatigue properties of intact sandstone in uniaxial cyclical loading", Rock Mech. Rock Eng., 38(3), 169-196. https://doi.org/10.1007/s00603-005-0045-8.
  3. Chen, G., Chen, T., Chen, Y., Huang, R. and Liu, M. (2018), "A new method of predicting the prestress variations in anchored cables with excavation unloading destruction", Eng. Geol., 241, 109-120. https://doi.org/10.1016/j.enggeo.2018.05.015.
  4. Chen, L., Wang, E., Junjun, F., Li, X., Kong, X. and Zhang, Z. (2016), "Numerical simulation on gas continuous emission from face during roadway excavation", Geomech. Eng., 10(3), 297-314. https://doi.org/10.12989/gae.2016.10.3.297.
  5. Choi, S.G., Chu, J. and Kwon, T.H. (2019), "Effect of chemical concentrations on strength and crystal size of biocemented sand", Geomech. Eng., 17(5), 465-473. https://doi.org/10.12989/gae.2019.17.5.465.
  6. Griggs, D. (1939), "Creep of rocks", J. Geol., 47(2), 225-251. https://doi.org/10.1086/624775.
  7. Jiang, Z., Jiang, Z., Li, H. and Wang, S. (2017), "Creep-seepage coupling laws of quartzite under cyclic loading-unloading conditions", Chin. J. Geotech. Eng., 39(10), 1832-1841. https://doi.org/10.11779/CJGE201710011.
  8. Jorat, M.E., Kreiter, S., Morz, T., Moon, V. and de Lange, W. (2013), "Strength and compressibility characteristics of peat stabilized with sand columns", Geomech Eng, 5(6), 575-594. https://doi.org/10.12989/gae.2013.5.6.575.
  9. Kaya, A. and Sayin, A. (2017), "Engineering geological appraisal and preliminary support design for the Salarha Tunnel, Northeast Turkey", B. Eng. Geol. Environ., 78(2), 1095-1112. https://doi.org/10.1007/s10064-017-1177-2.
  10. Kilic, A., Yasar, E. and Atis, C.D. (2003), "Effect of bar shape on the pull-out capacity of fully-grouted rockbolts", Tunn. Undergr. Sp. Tech., 18(1), 1-6. https://doi.org/10.1016/S0886-7798(02)00077-9.
  11. Kilic, A., Yasar, E. and Celik, A.G. (2002), "Effect of grout properties on the pull-out load capacity of fully grouted rock bolt", Tunn. Undergr. Sp. Tech., 17(4), 355-362. https://doi.org/10.1016/S0886-7798(02)00038-X.
  12. Lemaitre, J. (1984), "How to use damage mechanics", Nucl. Eng. Des., 80(2), 233-245. https://doi.org/10.1016/0029-5493(84)90169-9.
  13. Liu, J. and Li, J. (2018), "Analysis on meso-damage characteristics ofmarble under triaxial cyclic loading and unloading based on particle flow simulation", J. Cent. South Univ. Nat. Sci. Ed., 49(11), 2797-2803. https://doi.org/10.11817/j.issn.1672-7207.2018.11.021.
  14. Meng, Q., Zhang, M., Han, L., Pu, H. and Nie, T. (2016), "Effects of acoustic emission and energy evolution of rock specimens under the uniaxial cyclic loading and unloading compression", Rock Mech. Rock Eng., 49(10), 3873-3886. https://doi.org/10.1007/s00603-016-1077-y.
  15. Nield, J.M., King, J. and Jacobs, B. (2014), "Detecting surface moisture in aeolian environments using terrestrial laser scanning", Aeolian Res., 12, 9-17. https://doi.org/10.1016/j.aeolia.2013.10.006.
  16. Scheuermann, A. (1978), "Suggested methods for determining the strength of rock materials in triaxial compression", Int. J. Rock Mech. Min. Sci. Gcomech. Abstr., 15(2), 47-51. https://doi.org/10.1016/0148-9062(78)91677-7.
  17. Song, Y., Li, Y., Wang, W. and Liu, J. (2020), "Shear creep characteristics and constitutive model analysis of jointed rock mass", J. China Coal Soc., 45(4), 1357-1366. https://doi.org/10.13225/j.cnki.jccs.2019.1428.
  18. Tadeusiewicz, R. (2015), "Neural networks in mining sciences - General overview and some representative examples", Arch Min Sci, 60(4), 971-984. https://doi.org/10.1515/amsc-2015-0064.
  19. Tang, L., Zhao, Z., Chen, H., Wu, Y. and Zeng, Y. (2019), "Dynamic stress accumulation model of granite residual soil under cyclic loading based on small-size creep tests", J. Cent. South Univ., 26(3), 728-742. https://doi.org/10.1007/s11771-019-4043-5.
  20. Vasarhelyi, B. and Van, P. (2006), "Influence of water content on the strength of rock", Eng. Geol., 84(1), 70-74. https://doi.org/10.1016/j.enggeo.2005.11.011.
  21. Wang, J., Fu, J. and Song, W. (2020), "Mechanical properties and microstructure of layered cemented paste backfill under triaxial cyclic loading and unloading", Constr. Build. Mater., 257, 119540. https://doi.org/10.1016/j.conbuildmat.2020.119540.
  22. Wang, J., Liang, B. and Yang, P. (2019), "Creep experiment and nonlinear disturbance creep model of gneiss under dynamic and static loads", J. China Coal. Soc., 44(1), 192-198. https://doi.org/10.13225/j.cnki.jccs.2018.5036.
  23. Wang, J., Ning, J., Qiu, P., Yang, S. and Shang, H. (2019), "Microseismic monitoring and its precursory parameter of hard roof collapse in longwall faces: A case study", Geomech. Eng., 17(4), 375-383. https://doi.org/10.12989/gae.2019.17.4.375.
  24. Xu, P. and Yang, S. (2015), "Study of visco-elasto-plastic constitutive model of coal under cyclic loading", Chin. J. Rock Mech. Eng., 34(3), 537-545. https://doi.org/10.13722/j.cnki.jrme.2015.03.011.
  25. Xue, Y., Kong, F., Yang, W., Qiu, D., Su, M., Fu, K. and Ma, X. (2020), "Main unfavorable geological conditions and engineering geological problems along Sichuan-Tibet railway", Chin. J. Rock Mech. Eng., 39(3), 445-468. https://doi.org/10.13722/j.cnki.jrme.2019.0737.
  26. Yang, S., Xu, W. and Yang, S. (2007), "Investigation on shear rheological mechanical properties of shale in Longtan Hydropower Project", Rock Soil Mech., 28(5), 47-54. https://doi.org/10.16285/j.rsm.2007.05.009.
  27. Yang, X., Han, X., Liu, E., Zhang, Z. and Wang, X. (2018), "Experimental study on the acoustic emission characteristics of non-uniform deformation evolution of granite under cyclic loading and unloading test", Rock Soil Mech., 39(8), 2732-2739. https://doi.org/10.16285/j.rsm.2018.0048.