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Rock Mechanics and Rock Engineering

, Volume 51, Issue 3, pp 729–745 | Cite as

Experimental Study on Mechanical and Acoustic Emission Characteristics of Rock-Like Material Under Non-uniformly Distributed Loads

  • Xiao Wang
  • Zhijie Wen
  • Yujing Jiang
  • Hao Huang
Original Paper

Abstract

The mechanical and acoustic emission characteristics of rock-like materials under non-uniform loads were investigated by means of a self-developed mining-induced stress testing system and acoustic emission monitoring system. In the experiments, the specimens were divided into three regions and different initial vertical stresses and stress loading rates were used to simulate different mining conditions. The mechanical and acoustic emission characteristics between regions were compared, and the effects of different initial vertical stresses and different stress loading rates were analysed. The results showed that the mechanical properties and acoustic emission characteristics of rock-like materials can be notably localized. When the initial vertical stress and stress loading rate are fixed, the peak strength of region B is approximately two times that of region A, and the maximum acoustic emission hit value of region A is approximately 1–2 times that of region B. The effects of the initial vertical stress and stress loading rate on the peck strain, maximum hit value, and occurrence time of the maximum hit are similar in that when either of the former increase, the latter all decrease. However, peck strength will increase with the increase in loading rate and decrease with the increase in initial vertical stress. The acoustic emission hits can be used to analyse the damage in rock material, but the number of acoustic emission hits cannot be used alone to determine the degree of rock damage directly.

Keywords

Mining-induced stress Rock-like material Initial vertical stress Stress loading rate 

List of symbols

P1, P2, P3, P4, or P5

One of the vertical stresses of the non-uniformly distributed loads

F1, F2, or F3

One of the horizontal stresses of the non-uniformly distributed loads

PAC

Physical Acoustics Corporation

AE

Acoustic emission

V

Stress loading rate

K

The stop loading threshold of the test machine

\(D\)

Damage variable

DA

Damage of region A

DB

Damage of region B

Du

Damage critical value

\(\sigma_{0}\)

Initial vertical stress

\(\sigma_{A}\)

Stress of region A

\(\sigma_{B}\)

Stress of region B

\(\sigma_{P}\)

Peak strength

\(\sigma_{c}\)

Residual strength

TPA

The time of occurrence of the maximum number of hits of region A

TPB

The time of occurrence of the maximum number of hits of region B

Cd

The total number of acoustic emission hits from a specimen in a certain (short) amount of time

\(C\)

The total number of acoustic emission hits counted for a specimen that has been completely damaged

\(E\)

Elastic modulus of an intact specimen

\(\varepsilon\)

Strain

Notes

Acknowledgements

The authors would like to acknowledge the support of the National Natural Science Foundation of China (No. 51304126), the Fok Ying Tung Education Foundation (No. 141046), the China Postdoctoral Science Foundation (No. 2013M541918), the State Key Laboratory of Open Funds (No. SKLGDUEK1520, No. MDPC201703), the Tai’shan Scholar Engineering Construction Fund of Shandong Province of China, the Tai’shan Scholar Talent Team Support Plan for Advanced and Unique Discipline Areas, and the State Key Research Development Programme of China (No. 2016YFC0600708).

References

  1. Aggelis DG (2011) Classification of cracking mode in concrete by acoustic emission parameters. Mech Res Commun 38(3):153–157CrossRefGoogle Scholar
  2. Arora S, Mishra B (2015) Investigation of the failure mode of shale rocks in biaxial and triaxial compression tests. Int J Rock Mech Min Sci 79:109–123Google Scholar
  3. Fakhimi A, Hemami B (2015) Axial splitting of rocks under uniaxial compression. Int J Rock Mech Min Sci 79:124–134Google Scholar
  4. Ghamgosar M, Erarslan N (2016) Experimental and numerical studies on development of fracture process zone (FPZ) in rocks under cyclic and static loadings. Rock Mech Rock Eng 49(3):893–908CrossRefGoogle Scholar
  5. Ishida T, Kanagawa T, Kanaori Y (2010) Source distribution of acoustic emissions during an in situ direct shear test: implications for an analog model of seismogenic faulting in an inhomogeneous rock mass. Eng Geol 110(3–4):66–76CrossRefGoogle Scholar
  6. Iturrioz I, Lacidogna G, Carpinteri A (2013) Acoustic emission detection in concrete specimens: experimental analysis and lattice model simulations. Int J Damage Mech 23(3):327–358CrossRefGoogle Scholar
  7. Jiang LS, Sainoki A, Mitri HS et al (2016) Influence of fracture-induced weakening on coal mine gateroad stability. Int J Rock Mech Min Sci 88:307–317Google Scholar
  8. Kachanov LM (1958) Time rupture process under creep conditions. Izvestia Akademii Nauk SSSR, Otdelenie Tekhnicheskich Nauk 12(8):26–31Google Scholar
  9. Kim J, Yi J, Kim J et al (2013) Fatigue life prediction methodology using entropy index of stress interaction and crack severity index of effective stress. Int J Damage Mech 22(3):375–392CrossRefGoogle Scholar
  10. Kong B, Wang E, Li Z et al (2016) Fracture mechanical behavior of sandstone subjected to high-temperature treatment and its acoustic emission characteristics under uniaxial compression conditions. Rock Mech Rock Eng 49(12):4911–4918CrossRefGoogle Scholar
  11. Kupchella R, Stowe D, Xiao X et al (2015) Incorporation of material variability in the johnson cook model. Procedia Eng 103:318–325CrossRefGoogle Scholar
  12. Lavrov A (2003) The Kaiser effect in rocks: principles and stress estimation techniques. Int J Rock Mech Min Sci 40(2):151–171CrossRefGoogle Scholar
  13. Lockner D (1993) The role of acoustic emission in the study of rock fracture. Int J Rock Mech Min Sci Geomech Abstr 30(7):883–899CrossRefGoogle Scholar
  14. Meng QB, Zhang MW, Han LJ et al (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):3873–3886CrossRefGoogle Scholar
  15. Mizuno M, Okayasu M, Odagiri N (2010) Damage evaluation of piezoelectric ceramics from the variation of the elastic coefficient under static compressive stress. Int J Damage Mech 19(3):375–390CrossRefGoogle Scholar
  16. Mohamed KM, Murphy MM, Lawson HE et al (2016) Analysis of the current rib support practices and techniques in U.S. coal mines. Int J Min Sci Technol 26(1):77–87CrossRefGoogle Scholar
  17. Moradian ZA, Ballivy G, Rivard P et al (2010) Evaluating damage during shear tests of rock joints using acoustic emissions. Int J Rock Mech Min Sci 47(4):590–598CrossRefGoogle Scholar
  18. Murti V, Zhang W, Valliappan S (1991) Stress invariants in an orthotropic damage space. Eng Fract Mech 40(6):985–990CrossRefGoogle Scholar
  19. Peng SS (1986) Coal mine ground control, 2nd edn. Wiley, New YorkGoogle Scholar
  20. Přikryl R, Lokajíček T, Li C et al (2003) Acoustic emission characteristics and failure of uniaxially stressed granitic rocks: the effect of rock fabric. Rock Mech Rock Eng 36(4):255–270CrossRefGoogle Scholar
  21. Rabotnov YN (1969) Creep rupture. Applied mechanics. Springer, Berlin Heidelberg, pp 342–349Google Scholar
  22. Rezaei M, Hossaini MF, Majdi A (2015) Determination of longwall mining-induced stress using the strain energy method. Rock Mech Rock Eng 48(6):2421–2433CrossRefGoogle Scholar
  23. Rudajev V, Vilhelm J, Lokajı́Ček T (2000) Laboratory studies of acoustic emission prior to uniaxial compressive rock failure. Int J Rock Mech Min Sci 37(4):699–704CrossRefGoogle Scholar
  24. Shkuratnik VL, Filimonov YL, Kuchurin SV (2005) Regularities of acoustic emission in coal samples under triaxial compression. J Min Sci 41(1):44–52CrossRefGoogle Scholar
  25. Tham LG, Liu H, Tang CA et al (2005) On tension failure of 2-D rock specimens and associated acoustic emission. Rock Mech Rock Eng 38(1):1–19CrossRefGoogle Scholar
  26. Wang X, Wen ZJ, Jiang YJ (2016) Time–space effect of stress field and damage evolution law of compressed coal-rock. Geotech Geol Eng 34(6):1933–1940CrossRefGoogle Scholar
  27. Wasantha PL, Ranjith PG, Shao SS (2014) Energy monitoring and analysis during deformation of bedded-sandstone: use of acoustic emission. Ultrasonics 54(1):217–226CrossRefGoogle Scholar
  28. Yasitli NE, Unver B (2005) 3D numerical modeling of longwall mining with top-coal caving. Int J Rock Mech Min Sci 42(2):219–235CrossRefGoogle Scholar
  29. Zhang Q, Zhang XP (2017) A numerical study on cracking processes in limestone by the b-value analysis of acoustic emissions. Comput Geotech 92:1–10CrossRefGoogle Scholar
  30. Zhang XP, Zhang Q, Wu SC (2017) Acoustic emission characteristics of the rock-like material containing a single flaw under different compressive loading rates. Comput Geotech 83:83–97CrossRefGoogle Scholar
  31. Zong YJ, Han LJ, Wei JJ et al (2016) Mechanical and damage evolution properties of sandstone under triaxial compression. Int J Min Sci Technol 26(4):601–607CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2017

Authors and Affiliations

  • Xiao Wang
    • 1
    • 3
  • Zhijie Wen
    • 1
    • 2
  • Yujing Jiang
    • 1
  • Hao Huang
    • 4
  1. 1.State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and TechnologyShandong University of Science and TechnologyQingdaoChina
  2. 2.State Key Laboratory for GeoMechanics and Deep Underground EngineeringChina University of Mining and TechnologyBeijingChina
  3. 3.School of Civil EngineeringSoutheast UniversityNanjingChina
  4. 4.Kiso-Jiban Consultants Co., Ltd.TokyoJapan

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