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Rock Mechanics and Rock Engineering

, Volume 48, Issue 5, pp 1833–1848 | Cite as

A Novel Experimental Technique to Simulate Pillar Burst in Laboratory

  • M. C. He
  • F. Zhao
  • M. Cai
  • S. Du
Original Paper

Abstract

Pillar burst is one type of rockburst that occurs in underground mines. Simulating the stress change and obtaining insight into the pillar burst phenomenon under laboratory conditions are essential for studying the rock behavior during pillar burst in situ. To study the failure mechanism, a novel experimental technique was proposed and a series of tests were conducted on some granite specimens using a true-triaxial strainburst test system. Acoustic emission (AE) sensors were used to monitor the rock fracturing process. The damage evolution process was investigated using techniques such as macro and micro fracture characteristics observation, AE energy evolution, and b value analysis and fractal dimension analysis of cracks on fragments. The obtained results indicate that stepped loading and unloading simulated the pillar burst phenomenon well. Four deformation stages are divided as initial stress state, unloading step I, unloading step II, and final burst. It is observed that AE energy has a sharp increase at the initial stress state, accumulates slowly at unloading steps I and II, and increases dramatically at peak stress. Meanwhile, the mean b values fluctuate around 3.50 for the first three deformation stages and then decrease to 2.86 at the final stage, indicating the generation of a large amount of macro fractures. Before the test, the fractal dimension values are discrete and mainly vary between 1.10 and 1.25, whereas after failure the values concentrate around 1.25–1.35.

Keywords

Pillar burst test Acoustic emission b value Fractal dimension Granite 

Notes

Acknowledgments

This work was supported by the Key Project of National Natural Science Foundation of China (51134005) and the General Program of National Natural Science Foundation of China (40972196). Financial support from Projects (Nos. SKLGCUEK0916 and 80015Z675) are all appreciated. We would like to express our sincerest gratitude to the anonymous reviewer for their valuable modification suggestions on the significant improvement of this article.

References

  1. Alejano LR, Taboada J, García-Bastante F, Rodriguez P (2008) Multi-approach back-analysis of a roof bed collapse in a mining room excavated in stratified rock. Int J Rock Mech Min Sci 45(6):899–913CrossRefGoogle Scholar
  2. Baud P, Wong TF, Zhu W (2014) Effects of porosity and crack density on the compressive strength of rocks. Int J Rock Mech Min Sci 67:202–211Google Scholar
  3. Blake W (1972) Rock-burst mechanics. Q Colo Sch Mines (United States) 67(1)Google Scholar
  4. Cai M (2008) Influence of stress path on tunnel excavation response—numerical tool selection and modeling strategy. Tunn Undergr Space Technol 23:618–628CrossRefGoogle Scholar
  5. Cai M, Kaiser PK, Tasaka Y, Maejima T, Morioka H, Minami M (2004) Generalized crack initiation and crack damage stress thresholds of brittle rock masses near underground excavations. Int J Rock Mech Min Sci 41(5):833–847CrossRefGoogle Scholar
  6. Cai M, Kaiser PK, Morioka H, Minami M, Maejima T, Tasaka Y, Kurose H (2007) FLAC/PFC coupled numerical simulation of AE in large-scale underground excavations. Int J Rock Mech Min Sci 44(4):550–564CrossRefGoogle Scholar
  7. Carpinteri A, Corrado M, Lacidogna G (2012) Three different approaches for damage domain characterization in disordered materials: fractal energy density, b-value statistics, renormalization group theory. Mech Mater 53:15–28CrossRefGoogle Scholar
  8. Cheon DS, Jung YB, Park ES (2011) Evaluation of damage level for rock slopes using acoustic emission technique with waveguides. Eng Geol 121(1):75–88CrossRefGoogle Scholar
  9. Cook NGW (1965) A note on rockbursts considered as a problem of stability. J South Afr Inst Min Metall 65:437–446Google Scholar
  10. Curtis JF (1981) Rockburst phenomena in the gold mines of the Witwatersrand: a review. Inst Min Met Trans 90:163–176Google Scholar
  11. Ge XR (2004) Macro and micro experimental study on damage mechanics of soil (in Chinese)Google Scholar
  12. Girard L, Gruber S, Weber S, Beutel J (2013) Environmental controls of frost cracking revealed through in situ acoustic emission measurements in steep bedrock. Geophys Res Lett 40(9):1748–1753CrossRefGoogle Scholar
  13. Guo R, Pan CL (2003) Theory and technology of hard-rock burst-prone mining [M]Google Scholar
  14. He MC, Zhao F (2013) Laboratory study of unloading rate effects on rockburst. Disaster Adv 6(9):11–18Google Scholar
  15. He MC, Miao JL, Li DJ, Wang CG (2007) Experimental study on rockburst processes of granite specimen at great depth. Chin J Rock Mech Eng 26:865–876 (in Chinese)Google Scholar
  16. He MC, Miao JL, Feng JL (2010) Rock burst process of limestone and its acoustic emission characteristics under true-triaxial unloading conditions. Int J Rock Mech Min Sci 47:286–298CrossRefGoogle Scholar
  17. He M, Xia H, Jia X, Gong W, Zhao F, Liang K (2012a) Studies on classification, criteria and control of rockbursts. J Rock Mech Geotech Eng 4(2):97–114CrossRefGoogle Scholar
  18. He MC, Nie W, Zhao ZY, Guo W (2012b) Experimental investigation of bedding plane orientation on the rockburst behavior of sandstone. Rock Mech Rock Eng 45(3):311–326CrossRefGoogle Scholar
  19. Hedley DGF (1992) Rockburst handbook for Ontario hardrock mines. CANMET Special Report SP92-1EGoogle Scholar
  20. Jaiswal A, Shrivastva BK (2009) Numerical simulation of coal pillar strength. Int J Rock Mech Min Sci 46(4):779–788CrossRefGoogle Scholar
  21. Kaiser PK, Tannant DD, McCreath DR (1996) Canadian rockburst support handbook. Geomechanics Research Centre, Laurentian University, SudburyGoogle Scholar
  22. Kaiser PK, Yazici S, Maloney S (2001) Mining-induced stress change and consequences of stress path on excavation stability—a case study. Int J Rock Mech Min Sci 38(2):167–180CrossRefGoogle Scholar
  23. Kurz JH, Finck F, Grosse CU (2006) Stress drop and stress redistribution in concrete quantified over time by the b-value analysis. Struct Health Monit 5(1):69–81CrossRefGoogle Scholar
  24. Kushwaha A, Singh SK, Tewari S, Sinha A (2010) Empirical approach for designing of support system in mechanized coal pillar mining. Int J Rock Mech Min Sci 47(7):1063–1078CrossRefGoogle Scholar
  25. Miao JL, He MC, Li DJ, Zeng FJ, Zhang X (2009) Acoustic emission characteristics of granite under strain rockburst test and its micro-fracture mechanism. Chin J Rock Mech Eng 28:1593–1603 (in Chinese)Google Scholar
  26. Moradian ZA, Ballivy G, Rivard P, Gravel C, Rousseau B (2010) Evaluating damage during shear tests of rock joints using acoustic emissions. Int J Rock Mech Min Sci 47(4):590–598CrossRefGoogle Scholar
  27. Nejati HR, Ghazvinian A (2013) Brittleness effect on rock fatigue damage evolution. Rock Mech Rock Eng, 1–10Google Scholar
  28. Pan Y (2004) Catastrophe theory analysis on rockburst in narrow coal pillar. Chin J Rock Mech Eng 23(11):1797–1803Google Scholar
  29. Please CP (2013) Fracturing of an Euler–Bernoulli beam in coal mine pillar extraction. Int J Rock Mech Min Sci 64:132–138Google Scholar
  30. Poulsen BA (2010) Coal pillar load calculation by pressure arch theory and near field extraction ratio. Int J Rock Mech Min Sci 47(7):1158–1165CrossRefGoogle Scholar
  31. Richter CF (1958) Elementary seismology. W.H. Freeman, San FranciscoGoogle Scholar
  32. Sagar RV (2010) Verification of the applicability of lattice model to concrete fracture by AE study. Int J Fract 161(2):121–129CrossRefGoogle Scholar
  33. Sagar RV, Prasad BK, Kumar S-S (2012) An experimental study on cracking evolution in concrete and cement mortar by the b-value analysis of acoustic emission technique. Cem Concr Res 42(8):1094–1104CrossRefGoogle Scholar
  34. Sarkar K, Vishal V, Singh TN (2012) An empirical correlation of index geomechanical parameters with the compressional wave velocity. Geotech Geol Eng 30:469–479CrossRefGoogle Scholar
  35. Tang CA (2003) Numerical simulation on acoustic emission during pillar rock burst. Chin J Nonferrous Metals 13(3):754–759Google Scholar
  36. Vishal V, Pradhan SP, Singh TN (2011) Tensile strength of rock under elevated temperatures. Geotech Geol Eng 29:1127–1133CrossRefGoogle Scholar
  37. Wang J-A, Park HD (2001) Comprehensive prediction of rockburst based on analysis of strain energy in rocks. Tunn Undergr Space Technol 16(1):49–57CrossRefGoogle Scholar
  38. Wang T, Yan X, Yang H, Yang X (2011a) Stability analysis of the pillars between bedded salt cavern gas storages by cusp catastrophe model. Sci China Technol Sci 54(6):1615–1623CrossRefGoogle Scholar
  39. Wang H, Poulsen BA, Shen B (2011b) The influence of roadway backfill on the coal pillar strength by numerical investigation. Int J Rock Mech Min Sci 48(3):443–450CrossRefGoogle Scholar
  40. Wattimena RK (2013) Developing coal pillar stability chart using logistic regression. Int J Rock Mech Min Sci 58:55–60Google Scholar
  41. Wong NY (2008) Crack coalescence in molded gypsum and Carrara marble. PhD Massachusetts Institute of Technology, CambridgeGoogle Scholar
  42. Wong LNY, Zhang XP (2014) Size effects on cracking behavior of flaw-containing specimens under compressive loading. Rock Mech Rock Eng 47:1921–1930CrossRefGoogle Scholar
  43. Xie HP, Ju Y, Li LY (2005) Criteria for strength and structural failure of rocks based on energy dissipation and energy release principles. Chin J Rock Mech Eng 24(17):3003–3010Google Scholar
  44. Xu LS (2003) Research on the experimental rock mechanics of rockburst under unloading condition. J Chongqing Jiao Tong Univ 22:1–4Google Scholar
  45. Zhang H, Fu DH, Song HP (2014) Damage and fracture investigation of three-point bending notched sandstone beams by DIC and AE techniques. Rock Mech Rock EngGoogle Scholar
  46. Zhao ZG (2006) Analysis on influence factors of rock burst in narrow coal pillar. MNNG R & D 26(4):23–25 (in Chinese)Google Scholar
  47. Zhao XG, Cai M, Wang J (2013) Damage stress and acoustic emission characteristics of the Beishan granite. Int J Rock Mech Min Sci 64:258–269Google Scholar

Copyright information

© Springer-Verlag Wien 2014

Authors and Affiliations

  1. 1.State Key Laboratory for Geomechanics and Deep Underground EngineeringBeijingChina
  2. 2.School of Mechanics, Architecture and Civil EngineeringChina University of Mining and TechnologyBeijingChina
  3. 3.Bharti School of EngineeringLaurentian UniversitySudburyCanada

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