Crack evolution and acoustic emission characteristics of rock specimens containing random joints under uniaxial compression

Ma, Wenqiang; Wang, Jiuting; Li, Xiaoxiao; Wang, Tongxu

doi:10.1007/s11600-021-00686-3

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Tytuł artykułu

Crack evolution and acoustic emission characteristics of rock specimens containing random joints under uniaxial compression

Autorzy

Ma Wenqiang , Wang Jiuting , Li Xiaoxiao , Wang Tongxu

Wybrane pełne teksty z tego czasopisma

https://www.springer.com/journal/11600

Identyfikatory

DOI

10.1007/s11600-021-00686-3

Warianty tytułu

Języki publikacji

Abstrakty

Joints greatly affect the mechanical behavior and crack evolution of jointed rock masses. In this paper, numerical specimens containing pre-existing random joints are constructed based on a combination of the fat-joint and smooth-joint models in the particle flow code in two dimensions (PFC2D). Then, uniaxial compression of these specimens is carried out to reveal the influence of joint length or number on the mechanical behavior, crack development, acoustic emission (AE) event attributes and failure characteristics. The results suggest that a univariant increase in random joint length or number leads to a nonlinear decrease in the uniaxial compressive strength (UCS) and a linear decrease in the elastic modulus, while the fracture behavior of the specimens shows a transformation from brittle to ductile in this process. With increasing joint length or number, the cracks and AE events generated in the joints significantly increase and exceed those generated in the intact rock. Tension cracks play a dominant role in the development of cracks within intact rock, while shear cracks dominate the crack evolution of random joints. More cracks appear in the jointed rock specimens at the elastic deformation stage as the joint length or number increases. The variation in the joint length or number strongly influences the mechanical behavior, crack evolution and failure pattern of the randomly jointed rock specimen.

Słowa kluczowe

jointed rock mass random joints mechanical behavior crack evolution AE event

masa skalna łączona połączenia losowe zachowanie mechaniczne ewolucja pęknięć

Wydawca

Instytut Geofizyki PAN
Springer

Czasopismo

Acta Geophysica

Rocznik

2021

Tom

Vol. 69, no. 6

Strony

2427--2441

Opis fizyczny

Bibliogr. 26 poz.

Twórcy

autor

Ma Wenqiang

College of Architecture and Civil Engineering, Shihe District, Xinyang Normal University, No. 237, Nanhu Road, Xinyang City 464000, Henan Province, China

autor

Wang Jiuting

College of Architecture and Civil Engineering, Shihe District, Xinyang Normal University, No. 237, Nanhu Road, Xinyang City 464000, Henan Province, China

autor

Li Xiaoxiao

lxxmxr@163.com

College of Architecture and Civil Engineering, Shihe District, Xinyang Normal University, No. 237, Nanhu Road, Xinyang City 464000, Henan Province, China

https://orcid.org/0000-0001-6831-4506

autor

Wang Tongxu

State Key Laboratory of Mining Disaster Prevention and Control Co-Founded By Shandong Province and The Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China

Bibliografia

1. Bahrani N, Kaiser PK (2016) Numerical investigation of the influence of specimen size on the unconfined strength of defected rocks. Comput Geotech 77:56–67. https://doi.org/10.1016/j.compgeo.2016.04.004
2. Bahrani N, Kaiser PK (2017) Estimation of confined peak strength of crack-damaged rocks. Rock Mech Rock Eng 50(2):309–326. https://doi.org/10.1007/s00603-016-1110-1
3. Daphalapurkar NP, Ramesh KT, Graham-Brady L, Molinari JF (2011) Predicting variability in the dynamic failure strength of brittle materials considering pre-existing flaws. J Mech Phys Solids 59:297–319. https://doi.org/10.1016/j.jmps.2010.10.006
4. Farahmand K, Vazaios I, Diederichs MS, Vlachopoulos N (2018) Investigating the scale-dependency of the geometrical and mechanical properties of a moderately jointed rock using a synthetic rock mass (SRM) approach. Comput Geotech 95:162–179. https://doi.org/10.1016/j.compgeo.2017.10.002
5. Gao FQ, Kang HP (2016) Effects of pre-existing discontinuities on the residual strength of rock mass—insight from a discrete element method simulation. J Struct Geol 85:40–50. https://doi.org/10.1016/j.jsg.2016.02.010
6. Huang CC, Yang WD, Duan K, Fang LD, Wang L, Bo CJ (2019) Mechanical behaviors of the brittle rock-like specimens with multi-nonpersistent joints under uniaxial compression. Construct Build Mater 220:426–443. https://doi.org/10.1016/j.conbuildmat.2019.05.159
7. Itasca Consulting Group Inc (2016) PFC2D-particle flow code in 2 dimensions, version 5.0. Minneapolis, MN, USA
8. Jia LC, Chen M, Zhang W, Xu T, Zhou Y, Hou B, Jin Y (2013) Experimental study and numerical modeling of brittle fracture of carbonate rock under uniaxial compression. Mech Res Commun 50:58–62. https://doi.org/10.1016/j.mechrescom.2013.04.002
9. Jiang SQ, Li X, Tan YQ, Liu HH, Xu ZQ, Chen R (2017) Discrete element simulation of SiC ceramic with pre-existing random flaws under uniaxial compression. Ceram Int 43:13717–13728. https://doi.org/10.1016/j.ceramint.2017.07.084
10. Lei QH, Latham JP, Tsang CF (2017) The use of discrete fracture networks for modelling coupled geomechanical and hydrological behavior of fractured rocks. Comput Geotech 85:151–176. https://doi.org/10.1016/j.compgeo.2016.12.024
11. Liu RC, Jiang YJ, Li B, Wang XS (2015) A fractal model for characterizing fluid flow in fractured rock masses based on randomly distributed rock fracture networks. Comput Geotech 65:45–55. https://doi.org/10.1016/j.compgeo.2014.11.004
12. Ma WQ, Wang TX (2020) Numerical study of the influence of joint angle on the failure behavior of randomly and nonpersistently jointed rock mass. Arab J Sci Eng 45(5):4023–4036. https://doi.org/10.1007/s13369-020-04361-5
13. Ma C, Yao WM, Yao Y, Li J (2018) Simulating strength parameters and size effect of stochastic jointed rock mass using DEM method. KSCE J Civ Eng 22(12):4872–4881. https://doi.org/10.1007/s12205-017-1581-y
14. Peng J, Wong LNY, Teh CL (2018) A re-examination of slenderness ratio effect on rock strength: Insights from DEM grain-based modelling. Eng Geol 246:245–254. https://doi.org/10.1016/j.enggeo.2018.10.003
15. Potyondy D (2012) Flat-joint contact model (PFC3D), version 1.0. Itasca Consulting Group, Inc., Minneapolis, MN
16. Potyondy D (2013) Flat-joint contact model (PFC3D), version 1.0. Itasca Consulting Group, Inc., Minneapolis, MN.
17. Saadat M, Tah A (2019) A numerical approach to investigate the effects of rock texture on the damage and crack propagation of a pre-cracked granite. Comput Geotech 111:89–111. https://doi.org/10.1016/j.compgeo.2019.03.009
18. Stavrou A, Murphy W (2018) Quantifying the effects of scale and heterogeneity on the confined strength of micro-defected rocks. Int J Rock Mech Min 102:131–143. https://doi.org/10.1016/j.ijrmms.2018.01.019
19. Vazaios I, Farahmand K, Vlachopoulos N, Diederichs MS (2018) Effects of confinement on rock mass modulus: a synthetic rock mass modelling (SRM) study. J Rock Mech Geotech 10(3):436–456. https://doi.org/10.1016/j.jrmge.2018.01.002
20. Wang PT, Yang TH, Xu T, Cai MF, Li CH (2016) Numerical analysis on scale effect of elasticity, strength and failure patterns of jointed rock masses. Geosci J 20:539–549. https://doi.org/10.1007/s12303-015-0070-x
21. Wang PT, Yang TH, Yu QL, Liu HL, Zhang PH (2013) Characterization on jointed rock masses based on PFC2D. Front Struct Civ Eng 7(1):32–38. https://doi.org/10.1007/s11709-013-0187-9
22. Wang X, Cai M (2019) A DFN–DEM multi-scale modeling approach for simulating tunnel excavation response in jointed rock masses. Rock Mech Rock Eng 53(3):1053–1077. https://doi.org/10.1007/s00603-019-01957-8
23. Wu N, Liang ZZ, Li YC, Li H, Li WR, Zhang ML (2019a) Stress-dependent anisotropy index of strength and deformability of jointed rock mass: insights from a numerical study. Bull Eng Geo Enviro 78:5905–5917. https://doi.org/10.1007/s10064-019-01483-5
24. Wu SC, Chen L, Cheng ZQ (2019b) Macro and meso research on the zonal disintegration phenomenon and the mechanism of deep brittle rock mass. Eng Fract Mech 211:254–268. https://doi.org/10.1016/j.engfracmech.2019.02.023
25. Zhang XL, Jiao YY, Zhao J (2008) Simulation of failure process of jointed rock. J Cent South Univ T 15(6):888–894. https://doi.org/10.1007/s11771-008-0162-0
26. Zou YS, Zhang SC, Ma XF, Zhou T, Zeng B (2016) Numerical investigation of hydraulic fracture network propagation in naturally fractured shale formations. J Struct Geol 84:1–13. https://doi.org/10.1016/j.jsg.2016.01.004

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-23942be6-a836-43e4-ad15-7ccf1473429b