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Mechanism of zonal disintegration phenomenon in enclosing rock mass around deep tunnels

  • Hao Wu (吴 昊)Email author
  • Zhi-kun Guo (郭志昆)
  • Qin Fang (方 秦)
  • Ya-dong Zhang (张亚栋)
  • Jin-chun Liu (柳锦春)
Article

Abstract

In order to study the mechanism of the zonal disintegration phenomenon (ZDP), both experimental and theoretical investigations were carried out. Firstly, based on the similarity law, gypsum was chosen as equivalent material to simulate the deep rock mass, the excavation of deep tunnel was modeled by drilling a hole in the gypsum models, two circular cracked zones were measured in the model, and ZDP in the enclosing rock mass around deep tunnel was simulated in 3D gypsum model tests. Secondly, based on the elasto-plastic analysis of the stressed-strained state of the surrounding rock mass with the improved Hoek-Brown strength criterion and the bilinear constitutive model, the maximum stress zone occurred in vicinity of the elastic-plastic interface due to the excavation of the deep tunnel, rock material in maximum stress zone is in the approximate uniaxial loading state owing to the larger tangential force and smaller radial force, the mechanism of ZDP was explained, which lay in the creep instability failure of rock mass due to the development of plastic zone and transfer of the maximum stress zone within the rock mass. Thirdly, the analytical critical depth for the occurrence of ZDP was obtained, which depended on the mechanical indices and stress concentration coefficient of rock mass.

Key words

zonal disintegration phenomenon (ZDP) block-hierarchical structure deep tunnel creep instability stress concentration coefficient 

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References

  1. [1]
    SADOVSKII M A. Natural lumpiness of rocks [J]. Dokl Akad Nauk, 1979, 10(4): 247–248. (in Russian)Google Scholar
  2. [2]
    KOCHARYAN G G, SPIVAK A A. Movement of rock blocks during large-scale underground explosions. Part: Experimental I data [J]. Journal of Mining Science, 2001, 37(1): 64–76.CrossRefGoogle Scholar
  3. [3]
    KOCHARYAN G G, SPIVAK A A. Movement of rock blocks during large-scale underground explosions. Part II: Estimates by analytical models, numerical calculations, and comparative analysis of theoretical and experimental data [J]. Journal of Mining Science, 2001, 37(2): 149–168.CrossRefGoogle Scholar
  4. [4]
    KURLENYA M V, OPARIN V N, BALMASHNOVA E G. On dynamic behavior of “self-stressed” block media. Part I: One-dimensional mechanical-mathematical model [J]. Journal of Mining Science, 2001, 37(1): 1–9.CrossRefGoogle Scholar
  5. [5]
    KURLENYA M V, OPARIN V N, BALMASHNOVA E G. On dynamic behavior of “self-stressed” block media. Part II: Comparison of theoretical and experimental data [J]. Journal of Mining Science, 2001, 37(5): 455–461.CrossRefGoogle Scholar
  6. [6]
    KURLENYA M V, OPARIN V N. Problems of nonlinear geo-mechanics. Part I [J]. Journal of Mining Science, 1999, 20(3): 12–26. (in Russian)Google Scholar
  7. [7]
    KURLENYA M V, OPARIN V N. Problems of nonlinear geo-mechanics. Part II[J]. Journal of Mining Science, 2000, 36(4): 305–326.CrossRefGoogle Scholar
  8. [8]
    SHEMYAKIN E I, FISENKO G L, KURLENYA M V. Zonal disintegration of around underground workings. Part I: Date of on-site observations [J]. Journal of Mining Science, 1986, 22(3): 157–168.Google Scholar
  9. [9]
    OPARIN V N, AKININ A A, VOSTRIKOV V I, YUSHKIN V F. Nonlinear deformation processes in the vicinity of mine workings. Part I [J]. Journal of Mining Science, 2003, 39(4): 315–322.CrossRefGoogle Scholar
  10. [10]
    OPARIN V N, AKININ A A, VOSTRIKOV V I. Nonlinear deformation processes in the vicinity of mine workings. Part II [J]. Journal of Mining Science, 2003, 39(6): 523–533.CrossRefGoogle Scholar
  11. [11]
    ADAMS G R, JAGER A J. Petroscopic observations of rock fracturing ahead of stope faces in deep-level gold mines [J]. Journal of the South African Institute of Mining and Metallurgy, 1980, 80(6): 113–122Google Scholar
  12. [12]
    SHEMYAKIN E I, FISENKO G L, KURLENYA M V. Zonal disintegration of around underground workings. Part II: Rock fracture simulated in equivalent materials [J]. Journal of Mining Science, 1986, 22(4): 223–232.Google Scholar
  13. [13]
    LI Ying-jie. The study on the mechanism and experiment of zonal disintegration of rocks [D]. Shenyang: Liaoning Technical University, 2006. (in Chinese)Google Scholar
  14. [14]
    GU Jin-cai, GU Lei-yu, CHEN An-min, CHEN Wei. Model test study on mechanism of layered fracture within the surrounding rock of tunnels in deep stratum [J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(3): 433–438. (in Chinese)MathSciNetGoogle Scholar
  15. [15]
    SHEMYAKIN E I, FISENKO G L, KURLENYA M V. Zonal disintegration of around underground workings. Part III: Theoretical concepts [J]. Journal of Mining Science, 1987, 23(1): 1–5.Google Scholar
  16. [16]
    WANG Ming-yang, SONG Hua, ZHENG Da-liang. On mechanism of zonal disintegration within rock mass around deep tunnel and definition of “deep rock engineering” [J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(9): 1771–1776. (in Chinese)Google Scholar
  17. [17]
    LI Ying-jie, PAN Yi-shan, LI Zhong-hua Analysis of mechanism of zonal disintegration of rocks [J]. Chinese Journal of Geotechnical Engineering, 2006, 28(9): 1124–1128. (in Chinese)Google Scholar
  18. [18]
    METLOV L S, MOROZOV A F, ZBORSHCHIK M P. Physical foundations of mechanism of zonal rock failure in the vicinity of mine working [J]. Journal of Mining Science, 2002, 38(2): 150–155.CrossRefGoogle Scholar
  19. [19]
    GUZEV M A, PAROSHIN A A. Non-euclidean model of the zonal disintegration of rocks around an underground working [J]. Journal of Applied Mechanics and Technical Physics, 2001, 42(1): 131–139.CrossRefGoogle Scholar
  20. [20]
    REVA V N. Stability criteria of underground workings under zonal disintegration of rocks [J]. Journal of Mining Science, 2002, 38(1): 31–34.CrossRefGoogle Scholar
  21. [21]
    FADDEENKOV N N, TRUFAKIN N E, SHEMYAKIN E I. Mathematical representation of disintegration of rock with hierarchical defect structure [J]. Rock Mechanics and Rock Pressure, 1980, 16(6): 501–505.Google Scholar
  22. [22]
    LIAO Mei-chun. Experiment study on simulation of zoned fracturing of deep rock mass [D]. Nanjing: Engineering Institute of Engineering Corps, PLA University of Science and Technology, 2006. (in Chinese)Google Scholar
  23. [23]
    HOEK E, BROWN E T. Empirical strength criterion for rock mass [J]. Journal of Geotechnology Engineering, ASCE, 1980, 10(6): 1013–1035.Google Scholar
  24. [24]
    HOEK E. Strength of rock and rock masses [J]. New Journal of International Symposium of Rock Mechanics, 1995, 35(2): 4–16.Google Scholar
  25. [25]
    HOEK E, BROWN E T. Practical estimates of rock mass strength [J]. International Journal of Rock Mechanics and Mining Science and Geomechanical Abstract, 1997, 36(8): 1165–1186.CrossRefGoogle Scholar
  26. [26]
    CARRANZA C T, FAIRHURST C. The elasto-plastic response of under ground excavations in rock masses that satisfy the Hoek-Brown failure criterion [J]. Int J Rock Mech Sci, 1999, 36: 777–809.CrossRefGoogle Scholar
  27. [27]
    BARYSHNIKOV V D, GAKHOVA L N. Stress state of the rock mass in the vicinity of underground mining workings, pit edges, and below its bottom [J]. Journal of Mining Science, 2001, 37(5): 462–465.CrossRefGoogle Scholar
  28. [28]
    XU Zhi-lun, Elastic mechanics [M]. Beijing: High Education Press, 2004: 55–60. (in Chinese)Google Scholar
  29. [29]
    SHKLYARSKII M F, GLUSHIKHIN F P. Dynamic variation of the support pressure in a stope [J]. Journal of Mining Science, 1981, 17(6): 508–511.Google Scholar
  30. [30]
    NIKIFROVSKY B C, SHEMYAKIN E I. Dynamic destruction tremolo body [M]. Novosibirsk: Science Press, 1979. (in Russian)Google Scholar
  31. [31]
    ZHURKOV C N. Dilation mechanism strength solids [M]. Leningrad: Leningrad Press, 1979. (in Russian)Google Scholar
  32. [32]
    SHEMYAKIN E I, FISENKO G L, KURLENYA M V. Zonal disintegration of around underground workings. Part IV: Practical applications [J]. Journal of Mining Science, 1989, 25(4): 297–302.Google Scholar
  33. [33]
    WU Hao, FANG Qin, GUO Zhi-kun. Zonal disintegration phenomenon in rock mass surrounding deep tunnels [J]. Journal of China University of Mining & Technology, 2008, 18(2): 187–193.CrossRefGoogle Scholar

Copyright information

© Central South University Press and Springer-Verlag GmbH 2009

Authors and Affiliations

  • Hao Wu (吴 昊)
    • 1
    Email author
  • Zhi-kun Guo (郭志昆)
    • 1
  • Qin Fang (方 秦)
    • 1
  • Ya-dong Zhang (张亚栋)
    • 1
  • Jin-chun Liu (柳锦春)
    • 1
  1. 1.Engineering Institute of Engineering CorpsPLA University of Science and TechnologyNanjingChina

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