Abstract
The influence of different shapes and distribution forms of fractures on rock mass failure behavior has been extensively studied. However, the influence of the matrix arrangement and non-through-boundary distribution of fractures has not been fully reported. In this paper, four failure modes are determined by physical experiments, and then the local tensile shear failure characteristics are obtained by disassembly along the fracture surface. Discrete element (PFC2D) was used to study the local mechanical behavior and stress field evolution of specimens. The results show that the existence of fracture groups obviously weakens the compressive capacity of the specimens. As the dip angle increases, the weakening degree decreases gradually. The failure modes can be divided into diagonal inclined fracture plane, Y-shaped fracture plane, inclined axial tensile shear fracture plane, and axial split fracture plane. The mixed failure area of local tensile and shear is concentrated in the small dip fault group, while the local failure mode of the large dip joint group tends to be tensile. Influenced by the dip angle of joint group, the regional distribution patterns of tension, and pressure chains at local rock bridge are different obviously, and the transmission paths are curved chain and X-shaped connection respectively. In general, a matrix joint group is conducive to partition failure of rock mass, large dip angle is more conducive to compression, and the failure mode is more inclined to block.
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References
Bobet A, Einstein HH (1998) Fracture coalescence in rock-type material under uniaxial and biaxial compression. Int J Rock Mech Min Sci 35(7):863–888. https://doi.org/10.1016/S01489062(98)00005-9
Cao P, Liu T, Pu C, Lin H (2015) Crack propagation and coalescence of brittle rock-like specimens with pre-existing cracks in compression. Eng Geol 187:113–121. https://doi.org/10.1016/j.enggeo.2014.12.010
Chen X, Liao ZH, Xi P (2012) Deformability characteristics of jointed rock masses under uniaxial compression. Int J Min Sci Technol 22(2):213–221. https://doi.org/10.1016/j.ijmst.2011.08.012
Chen X, Liao ZH, Peng X (2013) Cracking process of rock mass models under uniaxial compression. J Cent South Univ 20(6):1661–1678. https://doi.org/10.1007/s11771-013-1660-2
Huang D, Gu D, Yang C, Huang R, Fu G (2016) Investigation on mechanical behaviors of sandstone with two preexisting flaws under triaxial compression. Rock Mech Rock Eng 49(2):375–399. https://doi.org/10.1007/s00603-015-0757-3
Ivars DM, Pierce ME, Darcel C, Reyes-Montes J, Potyondy DO, Young RP, Cundall PA (2011) The synthetic rock mass approach for jointed rock mass modelling. Int J Rock Mech Min Sci 48(2):219–244. https://doi.org/10.1016/j.ijrmms.2010.11.014
Khan M, He XQ, Farid A, Song DZ, Li ZL, Tian XH, Ni MQ (2021) A novel geophysical method for fractures mapping and risk zones identification in a coalmine, Northeast, China. Energy Rep 7:3785–3804
Khan M, He XQ, Farid A, Chen JQ, Wang HL, Song DZ, Zhou C (2022) Geophysical characterization of mining-induced complex geological deformations in a deep coalmine. Lithosphere 2021(Special 4)
Khan M, He XQ, Song DZ, Tian XH, Li ZL, Xue YR, Aslam KS (2023) Extracting and predicting rock mechanical behavior based on microseismic spatio-temporal response in an ultra-thick coal seam mine. Rock Mech Rock Eng 56(5):3725–3754
Lajtal EZ (1974) Brittle fracture in compression. Int J Fract 10(4):525–536. https://doi.org/10.1007/BF00155255
Luo F, Diao YL, Wu DT, Xu PD, Guo YJ, Li M (2021) Macro-meso failure study on the mechanism of central-boundary fractured rock masses. Indian Geotech J 52:301–314
Park CH, Bobet A (2009) Crack coalescence in specimens with open and closed flaws: a comparison. Int J Rock Mech Min Sci 46(5):819–829
Park CH, Bobet A (2010) Crack initiation, propagation and coalescence from frictional flaws in uniaxial compression. Eng Fract Mech 77(14):2727–2748
Prudencio M, Jan MVS (2007) Strength and failure modes of rock mass models with non-persistent joints. Int J Rock Mech Min Sci 44(6):890–902. https://doi.org/10.1016/j.ijrmms.2007.01.005
Sagong M, Bobet A (2002) Coalescence of multiple flaws in a rock-model material in uniaxial compression. Int J Rock Mech Min Sci 39(2):229–241. https://doi.org/10.1016/S1365-1609(02)00027-8
Shi C, Zhang Q, Wang SN (2018) Numerical Simulation Technology and Application of Particle Flow (PFC5.0). China Architecture and Building Press, Beijing
Tang CA, Lin P, Wong R (2001) Analysis of crack coalescence in rock-like materials containing three flaws-Part II: numerical approach. Int J Rock Mech Min Sci 38(7):925–939. https://doi.org/10.1016/S1365-1609(01)00065-X
Wong LNY, Einstein HH (2009) Systematic evaluation of cracking behavior in specimens containing single flaws under uniaxial compression. Int J Rock Mech Min Sci 46(2):239–249. https://doi.org/10.1016/j.ijrmms.2008.03.006
Wong RHC, Chau KT, Tang CA, Lin P (2001) Analysis of crack coalescence in rock-like materials containing three flaws—part I: experimental approach. Int J Rock Mech Min Sci 38(7):909–924. https://doi.org/10.1016/s1365-1609(01)00064-8
Yang SQ (2011) Crack coalescence behavior of brittle sandstone specimen containing two coplanar fissures in the process of deformation failure. Eng Fract Mech 78(17):3059–3081. https://doi.org/10.1016/j.engfracmech.2011.09.002
Yang SQ, Jing HW (2011) Strength failure and crack coalescence behavior of brittle sandstone specimen containing a single fissure under uniaxial compression. Int J Fract 168(2):227–250. https://doi.org/10.1007/s10704-010-9576-4
Yang SQ, Yang DS, Jing HW, Li YH, Wang SY (2012) An experimental study of the fracture coalescence behaviour of brittle sandstone specimens containing three fissures. Rock Mech Rock Eng 45(4):563–582
Yang SQ, Huang YH, Ranjith PG, Jiao YY, Ji J (2015) Discrete element modeling on the crack evolution behavior of brittle sandstone containing three fissures under uniaxial compression. Acta Mech Sinica 31(6):871–889. https://doi.org/10.1007/s10409-015-0444-3
Yang SQ, Tian WL, Huang YH, Ranjith PG (2016) An experimental and numerical study on cracking behavior of brittle sandstone containing two non-coplanar fissures under uniaxial compression. Rock Mech Rock Eng 49(4):1497–1515. https://doi.org/10.1007/s00603-015-0838-3
Yang SQ, Yin PF, Zhang YC, Chen M, Zhou XP, Jing HW, Zhang QY (2019) Failure behavior and crack evolution mechanism of a non-persistent jointed ock mass containing a circular hole. Int J Rock Mech Min Sci 114:101–121. https://doi.org/10.1016/j.ijrmms.2018.12.017
Zhang YC, Jiang YJ, Asahina D, Wang CS (2020) Experimental and numerical investigation on shear failure behavior of rock-like samples containing multiple non-persistent joints. Rock Mech Rock Eng 53(10):1–28
Zhang BH, Mu JY, Zheng J, Lv Q, Deng JH (2021) A new estimation method and an anisotropy index for the deformation modulus of jointed rock masses. J Rock Mech Geotech Eng 14(1):153–168. https://doi.org/10.1016/j.jrmge.2021.06.005
Zhou XP, Zhang YX, Ha QL, Zhu KS (2007) Micromechanical modeling of the complete stress-strain relationship for crack weakened rock subjected to compressive loading. Rock Mech Rock Eng 41(5):747–769. https://doi.org/10.1007/s00603-007-0130-2
Zhou XP, Bi J, Qian QH (2014) Numerical simulation of crack growth and coalescence in rock-like materials containing multiple pre-existing flaws. Rock Mech Rock Eng 48(3):1097–1114. https://doi.org/10.1007/s00603-014-0627-4
Funding
This research is financially supported by the National Natural Science Foundation of China (51804093), the Natural Science Foundation of Hebei Province (E2020402048), the 333 Talent Project Foundation of Hebei Province (C20221027), the Research Foundation for Introduced Overseas Talents of Hebei Province (C20220310), and the Science and technology projects for colleges and universities in Hebei Province (BJ2019021).
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Luo, F., Gao, S., Xu, Z. et al. Mechanical behavior and tension-shear failure mechanism of fractured rock mass under uniaxial condition. Bull Eng Geol Environ 82, 314 (2023). https://doi.org/10.1007/s10064-023-03330-0
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DOI: https://doi.org/10.1007/s10064-023-03330-0