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Mechanical Performance of Confined Consolidation on the Strength Development of Cemented Paste Backfill

  • Chao Yang
  • Peng YangEmail author
  • Wen-sheng Lv
  • Zhi-kai Wang
Original Paper
  • 24 Downloads

Abstract

The mechanical performance of cemented paste backfill (CPB) placed in deep stopes often differs from laboratory-predicted performance, and the strength of CPB is generally determined to the uniaxial compressive strength (UCS) after the predetermined curing ages in laboratory. However, in situ backfilled stopes, the CPB is enclosed by the orebody and surrounding rocks usually, and the mechanical performance of CPB should not only be determined by the UCS. To investigate the mechanical performance of CPB in deep stopes during long-term service, the physical and mechanical conditions of CPB in situ backfilled stopes were simulated by the confined high-stress consolidation (CHSC), and the microstructure of CPB made by scanning electron microscopy was analyzed, and the strength regeneration mechanism of CPB was investigated from the microscopic point of view. The results showed that the strength of CPB in deep stopes could be excited to various degrees during long-term service, and the degree of excitation was closely related to the curing ages of CPB. The degree of excitation of the CPB strength was determined by the maximum confined consolidation stress, and the consolidated CPB was more beneficial to its supporting role in engineering. The macroscopic strength of CPB after CHSC can be increased by the increase of bond strength at the interfacial transition zone and the improvement of overall compactness of CPB. The re-filling and re-cementation of micro-cracks result in the strengthening of CPB during the re-curing ages. Compression consolidation (primary consolidation) and chemical consolidation (sub-consolidation) of CPB in the backfilled stopes occur simultaneously, and this is obviously different from the process of the compression consolidation of soil.

Keywords

Cemented paste backfill Confined high-stress consolidation Uniaxial compressive strength Strength excitation Strength regeneration mechanism Chemical consolidation 

Notes

Acknowledgements

This work was supported by the National Science & Technology Pillar Program during the 12th “Five Year” Plan period in China (2011BAZ03382).

References

  1. Ahmad MS, Shah SS (2016) Load settlement behaviour of fly ash mixed with waste sludge and cement. Geotech Geol Eng 34(1):37–58CrossRefGoogle Scholar
  2. Belem T, Benzaazoua M (2008) Design and application of underground mine paste backfill technology. Geotech Geol Eng 26(2):147–174CrossRefGoogle Scholar
  3. Belem T, Fourie AB, Fahey M (2010) Time-dependent failure criterion for cemented paste backfills. In: Proceedings of the 13th international seminar on paste and thickened tailings. Australian Centre for Geomechanics, pp 147–162Google Scholar
  4. Belem T, El Aatar O, Bussière B, Benzaazoua M (2016) Gravity-driven 1-D consolidation of cemented paste backfill in 3-m-high columns. Innov Infrastruct Solut 1(1):37CrossRefGoogle Scholar
  5. Bentz DP (2009) Influence of internal curing using lightweight aggregates on interfacial transition zone percolation and chloride ingress in mortars. Cem Concr Compos 31(5):285–289CrossRefGoogle Scholar
  6. Cui L, Fall M (2016a) Mechanical and thermal properties of cemented tailings materials at early ages: influence of initial temperature, curing stress and drainage conditions. Constr Build Mater 125:553–563CrossRefGoogle Scholar
  7. Cui L, Fall M (2016b) Multiphysics model for consolidation behavior of cemented paste backfill. Int J Geomech 17(3):04016077CrossRefGoogle Scholar
  8. Demie S, Nuruddin MF, Shafiq N (2013) Effects of micro-structure characteristics of interfacial transition zone on the compressive strength of self-compacting geopolymer concrete. Constr Build Mater 41:91–98CrossRefGoogle Scholar
  9. du Plessis GE, Liebenberg L, Mathews EH (2013) Case study: the effects of a variable flow energy saving strategy on a deep-mine cooling system. Appl Energy 102:700–709CrossRefGoogle Scholar
  10. Duan P, Shui Z, Chen W, Shen C (2013) Effects of metakaolin, silica fume and slag on pore structure, interfacial transition zone and compressive strength of concrete. Constr Build Mater 44:1–6CrossRefGoogle Scholar
  11. Fall M, Pokharel M (2010) Coupled effects of sulphate and temperature on the strength development of cemented tailings backfills: Portland cement-paste backfill. Cem Concr Compos 32(10):819–828CrossRefGoogle Scholar
  12. Fall M, Célestin JC, Pokharel M, Touré M (2010) A contribution to understanding the effects of curing temperature on the mechanical properties of mine cemented tailings backfill. Eng Geol 114(3–4):397–413CrossRefGoogle Scholar
  13. Ghirian A, Fall M (2014) Coupled thermo-hydro-mechanical-chemical behaviour of cemented paste backfill in column experiments: part II: mechanical, chemical and microstructural processes and characteristics. Eng Geol 170:11–23CrossRefGoogle Scholar
  14. Ghirian A, Fall M (2015) Coupled behavior of cemented paste backfill at early ages. Geotech Geol Eng 33(5):1141–1166CrossRefGoogle Scholar
  15. Ghirian A, Fall M (2016) Strength evolution and deformation behaviour of cemented paste backfill at early ages: effect of curing stress, filling strategy and drainage. Int J Min Sci Technol 26(5):809–817CrossRefGoogle Scholar
  16. Gorakhki MH, Bareither CA (2018) Compression behavior of mine tailings amended with cementitious binders. Geotech Geol Eng 36(1):27–47CrossRefGoogle Scholar
  17. Huang S, Xia K, Qiao L (2011) Dynamic tests of cemented paste backfill: effects of strain rate, curing time, and cement content on compressive strength. J Mater Sci 46(15):5165–5170CrossRefGoogle Scholar
  18. Koohestani B, Koubaa A, Belem T, Bussière B, Bouzahzahet H (2016) Experimental investigation of mechanical and microstructural properties of cemented paste backfill containing maple-wood filler. Constr Build Mater 121:222–228CrossRefGoogle Scholar
  19. Kwiatek G, Plenkers K, Dresen G (2011) Source parameters of picoseismicity recorded at Mponeng deep gold mine, South Africa: implications for scaling relations. Bull Seismol Soc Am 101(6):2592–2608CrossRefGoogle Scholar
  20. Li JJ, Hu MS, Ding E, Kong W, Pan DM, Chen S (2016) Multi-parameter numerical simulation of dynamic monitoring of rock deformation in deep mining. Int J Min Sci Technol 26(5):851–855CrossRefGoogle Scholar
  21. Lin F, Meyer C (2009) Hydration kinetics modeling of Portland cement considering the effects of curing temperature and applied pressure. Cem Concr Res 39(4):255–265CrossRefGoogle Scholar
  22. Liu RG, Han FH, Yan PY (2013) Characteristics of two types of CSH gel in hardened complex binder pastes blended with slag. Sci China Technol Sci 56(6):1395–1402CrossRefGoogle Scholar
  23. Liu L, Fang Z, Qi C, Zhang B, Guo L, Song KI (2018) Experimental investigation on the relationship between pore characteristics and unconfined compressive strength of cemented paste backfill. Constr Build Mater 179:254–264CrossRefGoogle Scholar
  24. Niroshan N, Yin L, Sivakugan N, Veenstra RL (2018) Relevance of SEM to long-term mechanical properties of cemented paste backfill. Geotech Geol Eng 36:2171–2187CrossRefGoogle Scholar
  25. Rong H, Zhou M, Hou H (2017) Pore structure evolution and its effect on strength development of sulfate-containing cemented paste backfill. Minerals 7(1):8CrossRefGoogle Scholar
  26. Sheshpari M (2015) A review of underground mine backfilling methods with emphasis on cemented paste backfill. Electron J Geotech Eng 20(13):5183–5208Google Scholar
  27. Sun W, Wu A, Hou K, Yang Y, Liu L, Wen Y (2016) Real-time observation of meso-fracture process in backfill body during mine subsidence using X-ray CT under uniaxial compressive conditions. Constr Build Mater 113:153–162CrossRefGoogle Scholar
  28. Tan Q, Tang H, Fan L, Xiong C, Fan Z, Zhao M et al (2018) In situ triaxial creep test for investigating deformational properties of gravelly sliding zone soil: example of the Huangtupo 1# landslide, China. Landslide 15(12):2499–2508CrossRefGoogle Scholar
  29. Wang ZK, Yang P (2016) Damage constitutive model after confined compression consolidation of tailings-cemented backfill. Electron J Geotech Eng 41(21):5305–5317Google Scholar
  30. Wang ZK, Yang P, Lyu WS (2018) Study of the backfill confined consolidation law and creep constitutive model under high stress. Geotech Test J 41(2):390–402Google Scholar
  31. Wu D, Zhao R, Qu C (2019) Effect of curing temperature on mechanical performance and acoustic emission properties of cemented coal gangue-fly ash backfill. Geotech Geol Eng 37:3241–3253CrossRefGoogle Scholar
  32. Yan B, Tannant D, Lv W, Cai M (2018) Effect of fly ash on the mechanical properties of cemented backfill made with brine. Geotech Geol Eng 37:691–705CrossRefGoogle Scholar
  33. Yang CC, Su JK (2002) Approximate migration coefficient of interfacial transition zone and the effect of aggregate content on the migration coefficient of mortar. Cem Concr Res 32(10):1559–1565CrossRefGoogle Scholar
  34. Yilmaz E, Benzaazoua M, Belem T (2009) Effect of curing under pressure on compressive strength development of cemented paste backfill. Miner Eng 22(9):772–785CrossRefGoogle Scholar
  35. Yilmaz E, Belem T, Benzaazoua M, Kesimal A, Ercikdi B, Cihangir F (2011a) Use of high-density paste backfill for safe disposal of copper/zinc mine tailings. Gospod Surowcami Miner 27:81–94Google Scholar
  36. Yilmaz E, Belem T, Bussière B (2011b) Relationships between microstructural properties and compressive strength of consolidated and unconsolidated cemented paste backfills. Cem Concr Compos 33(6):702–715CrossRefGoogle Scholar
  37. Yilmaz E, Belem T, Benzaazoua M (2012) One-dimensional consolidation parameters of cemented paste backfills. Gospod Surowcami Miner 28(4):29–45Google Scholar
  38. Yilmaz E, Belem T, Benzaazoua M (2013) Effects of curing and stress conditions on hydromechanical, geotechnical and geochemical properties of cemented paste backfill. Eng Geol 168:23–37CrossRefGoogle Scholar
  39. Yu GB, Yang P, Chen YZ (2013) Study on damage constitutive model of cemented tailings backfill under uniaxial compression. Appl Mech Mater 353:379–383CrossRefGoogle Scholar
  40. Zhang Y, Liu C, Liu Z, Liu G, Yang L (2017) Modelling of diffusion behavior of ions in low-density and high-density calcium silicate hydrate. Constr Build Mater 155:965–980CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Chao Yang
    • 1
  • Peng Yang
    • 2
    Email author
  • Wen-sheng Lv
    • 1
  • Zhi-kai Wang
    • 3
  1. 1.School of Civil and Resource EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.College of International EducationBeijing Union UniversityBeijingChina
  3. 3.China ENFI Engineering Co., LtdBeijingChina

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