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http://dx.doi.org/10.12989/gae.2020.22.5.385

Mechanical properties and failure mechanisms of sandstone with pyrite concretions under uniaxial compression  

Chen, Shao J. (College of Mining and Safety Engineering, Shandong University of Science and Technology)
Ren, Meng Z. (College of Mining and Safety Engineering, Shandong University of Science and Technology)
Wang, Feng (College of Mining and Safety Engineering, Shandong University of Science and Technology)
Yin, Da W. (College of Mining and Safety Engineering, Shandong University of Science and Technology)
Chen, Deng H. (Key Laboratory of Safety and High-efficiency Coal Mining, Ministry of Education, Anhui University of Science and Technology)
Publication Information
Geomechanics and Engineering / v.22, no.5, 2020 , pp. 385-396 More about this Journal
Abstract
A uniaxial compression test was performed to analyse the mechanical properties and macroscale and mesoscale failure mechanisms of sandstone with pyrite concretions. The effect of the pyrite concretions on the evolution of macroscale cracks in the sandstone was further investigated through numerical simulations with Particle Flow Code in 2D (PFC2D). The results revealed that pyrite concretions substantially influence the mechanical properties and macroscale and mesoscale failure characteristics of sandstone. During the initial loading stage, significant stress concentrations occurred around the edges of the pyrite concretion accompanied by the preferential generation of cracks. Meanwhile, the events and cumulative energy counts of the acoustic emission (AE) signal increased rapidly because of friction sliding between the concretion and sandstone matrix. As the axial stress increased, the degree of the stress concentration remained relatively unchanged around the edges of the concretions. The cracks continued growing rapidly around the edges of the concretions and gradually expanded toward the centre of the sample. During this stage, the AE events and cumulative energy counts increased quite slowly. As the axial stress approached the peak strength of the sandstone, the cracks that developed around the edges of the concretion started to merge with cracks that propagated at the top-left and bottom-right corners of the sample. This crack evolution ultimately resulted in the shear failure of the sandstone sample around the edges of the pyrite concretions.
Keywords
pyrite concretion; mechanical properties; failure mechanics; acoustic emission; discrete element method;
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1 Wang, F., Xu, J.L. and Xie, J.L. (2019b), "Effects of arch structure in unconsolidated layers on fracture and failure of overlying strata", Int. J. Rock Mech. Min. Sci., 114, 141-152. https://doi.org/10.1016/j.ijrmms.2018.12.016.   DOI
2 Wong, L.N.Y. and Einstein, H.H. (2009), "Systematic evaluation of cracking behavior in specimens containing single flaws under uniaxial compression", Int. J. Rock Mech. Min. Sci., 46, 239-249. https://doi.org/10.1016/j.ijrmms.2008.03.006.   DOI
3 Wu, W.P., Feng, X.T., Zhang, C.Q. and Qiu, S.L. (2011), "Classification of failure modes and controlling measures for surrounding rock of deep tunnel in hard rock", Chin. J. Rock Mech. Eng., 30(9), 1782-1802 (in Chinese). https://doi.org/10.1111/j.1759-6831.2010.00113.x.
4 Xu, Z.L. (2008), Elasticity, Higher Education Press, Beijing, China.
5 Yin, D.W., Chen, S.J., Chen, B., Liu, X.Q. and Ma, H.F., (2017), "Strength and failure characteristics of the rock-coal combined body with single joint in coal", Geomech. Eng., 15(5), 1113-1124. https://doi.org/10.12989/gae.2018.15.5.1113.   DOI
6 Zaitsev, Y.B. and Wittmann, F.H. (1981), "Simulation of crack propagation and failure of concrete", Mater. Struct., 14(5), 357-365. https://doi.org/10.1007/BF02478729.
7 Zhao, T.B., Guo, W.Y., Lu, C.P. and Zhao, G.M. (2016), "Failure characteristics of combined coal-rock with different interfacial angles", Geomech. Eng., 11(3), 345-359. https://doi.org/10.12989/gae.2016.11.3.345.   DOI
8 Zhao, W.H., Huang, R.Q. and Yan, M. (2015), "Mechanical and fracture behavior of rock mass with parallel concentrated joints with different dip angle and number based on PFC simulation", Geomech. Eng., 8(6), 757-767. https://doi.org/10.12989/gae.2015.8.6.757.   DOI
9 Zhu, Q.Q., Li, D.Y., Han, Z.Y., Li, X.B. and Zhou, Z.L. (2019), "Mechanical properties and fracture evolution of sandstone specimens containing different inclusions under uniaxial compression", Int. J. Rock Mech. Min. Sci., 115, 33-47. https://doi.org/10.1016/j.ijrmms.2019.01.010.   DOI
10 Greno, G.L., Otegui, J.L. and Boeri, R.E. (1999), "Mechanisms of fatigue crack growth in Austempered Ductile Iron", Int. J. Fracture, 21(1), 35-43. https://doi.org.10.1016/s0142-1123(98)00055-3.
11 Lee, H.P., Olson, J.E. and Schultz, R.A. (2018), "Interaction analysis of propagating opening mode fractures with veins using the discrete element method", Int. J. Rock Mech. Min. Sci., 103, 275-288. https://doi.org/10.1016/j.ijrmms.2018.01.005.   DOI
12 Amann, F., Undul, O. and Kaiser, P.K. (2014), "Crack initiation and crack propagation in heterogeneous sulfate-rich clay rocks", Rock Mech. Rock Eng., 47(5), 1849-1865. https://doi.org/10.1007/s00603-013-0495-3.   DOI
13 Bewick, R.P., Kaiser, P.K. and Amann, F. (2018), "Strength of massive to moderately jointed hard rock masses", J. Rock Mech. Geotech. Eng., 11(3), 562-575. https://doi.org/10.1016/j.jrmge.2018.10.003.   DOI
14 Itasca Consulting Group. (2008), PFC2D (Particle Flow Code in 2 Dimensions) fish in PFC2D, Itasca Consulting Group, Minneapolis, U.S.A.
15 Janeiro, R.P. (2009), "The effect of inclusions in brittle material", Ph.D. Dissertation, Massachusetts Institute of Technology, Cambridge, Massachusetts, U.S.A.
16 Janeiro, R.P. and Einstein, H.H. (2010), "Experimental study of the cracking behavior of specimens containing inclusions under uniaxial compression", Int. J. Fracture, 164(1), 83-102. https://doi.org/10.1007/s10704-010-9457-x.   DOI
17 Leite, M.H., Boivin, V. and Corthesy, R. (2019), "Stress calculation methods for overcoring techniques in heterogeneous rocks", Int. J. Rock Mech. Min. Sci., 47(7), 1180-1192. https://doi.org/10.1016/j.ijrmms.2010.06.002.   DOI
18 Li, D.Y., Han, Z.Y., Sun, X.L., Zhou, T. and Li, X.B. (2019), "Dynamic mechanical properties and fracturing behavior of marble specimens containing single and double flaws in SHPB tests", Rock Mech. Rock Eng., 52(6), 1623-1643. https://doi.org/10.1007/s00603-018-1652-5.   DOI
19 Li, J.X., Zhang, L.X. and Yang, L. (2014), Mineral Petrology, University of Electronic Science and Technology Press, Chengdu, Sichuan, China.
20 Lindeman, Z.R., Witemberg-Perzyk, D. and Perzyk, M.A. (1982), "A micromechanical prediction of elastic properties of composites with spherical particles", J. Reinf. Plast. Comp., 1(1), 3-15. https://doi.org/10.1177/073168448200100101.   DOI
21 Goodier, J.N. (1933), "Concentration of stress around spherical and cylindrical inclusions and flaws", J. Appl. Mech., 1, 39-44.   DOI
22 Chen, S.J., Qu, X., Yin, D.W., Liu X.Q. and Ma, H.F. (2018), "Investigation lateral deformation and failure characteristics of strip coal pillar in deep mining", Geomech. Eng., 14(5), 421-428. https://doi.org/10.12989/gae.2018.14.5.421.   DOI
23 Chen, S.J., Yin, D.W., Jiang, N., Wang, F. and Guo, W.J. (2019), "Simulation study on effects of loading rate on uniaxial compression failure of composite rock-coal layer", Geomech. Eng., 17(4), 333-342. https://doi.org/10.12989/gae.2019.17.4.333.   DOI
24 Gao, F.Q., Kang, H.P. and Wu, Y.Z. (2016), "Experimental and numerical study on the effect of calcite on the mechanical behaviour of coal", Int. J. Coal Geol., 158, 119-128. https://doi.org/10.1016/j.coal.2016.03.008.   DOI
25 Salimidelshad, Y., Moradzadeh, A., Kazemzadeh, E., Pourafshary, P. and Majdi, A. (2019), "Experimental investigation of changes in petrophysical properties and structural deformation of carbonate reservoirs", Petrol. Explor. Dev., 46(3), 565-575. https://doi.org/10.1016/S1876-3804(19)60036-4.   DOI
26 Liu, G.F., Feng, X.T., Jiang, Q., Duan, S.Q., Yao, Z.B., Pei, S.F., Duan, X.P. and Zhou, M.X. (2016), "Failure characteristics, laws and mechanisms of rock spalling in excavation of large-scale underground powerhouse caverns in Baihetan", Chin. J. Rock Mech. Eng., 35, 865-878 (in Chinese). https://doi.org/10.13722/j.cnki.jrme.2015.0933.
27 Maji, A.K., Tasdemir, M.A. and Shah, S.P. (1991), "Mixed mode crack propagation in quasi-brittle materials", Eng. Fract. Mech., 38(2-3), 129-145. https://doi.org/10.1016/0013-7944(91)90077-e.   DOI
28 Ortiz, J., Cisilino, A.P. and Otegui, J.L. (2000), "Boundary element modelling of fatigue crack propagation in ductile iron", Proceedings of the European Congress on Computational Methods in Applied Sciences and Engineering, Barcelona, Spain, September.
29 Sharafisafa, M., Shen, L.M., Zheng, Y.G. and Xiao J.Z. (2019), "The effect of flaw filling material on the compressive behaviour of 3D printed rock-like discs", Int. J. Rock Mech. Min. Sci., 117, 105-117. https://doi.org/10.1016/j.ijrmms.2019.03.031.   DOI
30 Tsuchina, E. and Mura, T. (1983), "On the stress concentration around a spherical inclusion", J. Reinf. Plast. Comp., 2(1), 29-33. https://doi.org/10.1177/073168448300200103.   DOI
31 Wang, F., Jiang, B.Y., Chen, S.J. and Ren, M.Z. (2019a), "Surface collapse control under thick unconsolidated layers by backfilling strip mining in coal mines", Int. J. Rock Mech. Min. Sci., 113, 268-277. https://doi.org/10.1016/j.ijrmms.2018.11.006.   DOI