Physical modeling of the controlled shaft deformation law during the solid backfill mining of ultra-close coal seams

  • Hao Yan
  • Jixiong ZhangEmail author
  • Sheng Zhang
  • Nan Zhou
Original Paper


Solid backfill mining has gradually become the key technology to control shaft deformation during industrial square coal pillar recovery. The industrial square area of the Nantun coal mine was studied in this paper. Based on similarity criteria of the physical modeling, an experimental model was designed to study the shaft deformation law under caving mining and backfill mining. A non-contact full-field strain measurement system and a resistance strain gauge were adopted to monitor the model. The mining-induced deformations, failures and stress distributions of shaft-surrounding rock masses during the recovery of industrial square coal pillars by caving mining and backfill mining were explicitly compared and analyzed. The results showed that the deformation and failure of shafts was caused by strata movements during the mining of the coal seams. Different lithology, stiffnesses, and thicknesses of adjacent rock strata result in asynchronous stratum movements, which thus cause shaft failure. The key to controlling mining-induced deformation of shafts during solid backfill mining is to control strata movement as follows: solid backfilling → control of the strata movement → control of the shaft deformation → decrease of the tension and shear force experienced by the shaft → decrease of shaft damage. Finally, the design method of the backfill body’s compression ratio based on shaft deformation control during the solid backfill mining process is proposed, thus laying the foundation for the safe recovery of an unexploited coal industrial square in resource-exhausted coal mines.


Industrial square coal pillar recovery Shaft deformation Soild backfill mining Physical modeling 



This research was funded by the National Science Fund for Distinguished Young Scholars [grant number 51725403].


  1. Bruneau G, Hudyma MR, Hadjigeorgiou J, Potvin Y (2003) Influence of faulting on a mine shaft—a case study: part II—numerical modelling. Int J Rock Mech Min 40:113–125CrossRefGoogle Scholar
  2. Chen QS, Zhang QL, Fourie A, Chen X, Qi CC (2017) Experimental investigation on the strength characteristics of cement paste backfill in a similar stope model and its mechanism. Constr Build Mater 154:34–43CrossRefGoogle Scholar
  3. Chen QS, Zhang QL, Qi CC, Fourie A, Xiao CC (2018) Recycling phosphogypsum and construction demolition waste for cemented paste backfill and its environmental impact. J Clean Prod 186:418–429CrossRefGoogle Scholar
  4. Ghabraie B, Ren G, Zhang XY, Smith J (2015) Physical modelling of subsidence from sequential extraction of partially overlapping longwall panels and study of substrata movement characteristics. Int J Coal Geol 140:71–83CrossRefGoogle Scholar
  5. Huang SJ, Xiong H, Wei SL, Huang CH, Yang Y (2016) Physical simulation of the interlayer effect on SAGD production in Mackay river oil sands. Fuel 183:373–385CrossRefGoogle Scholar
  6. Huang YL, Li JM, Qi WY, Zhang JX, Deng XJ, Kang T (2017) Design method of protective pillars in pit shafts in residual pillar recovery of industrial square of backfill mining. J Residuals Sci Tech 14(2):25–32Google Scholar
  7. Kratzsch H (1983) Mining subsidence engineering. Springer, HeidelbergCrossRefGoogle Scholar
  8. Lei K, Pan HY, Lin CY (2016) A landscape approach towards ecological restoration and sustainable development of mining areas. Ecol Eng 90:320–325CrossRefGoogle Scholar
  9. Li HC (1988) Similar simulation test of mine pressure. China University of Mining and Technology Press, XuzhouGoogle Scholar
  10. Li QW, Chen L, Xiao YY, Qiao L, Wang Y (2017) Energy characterization based assessment of pillar recovery. Arab J Geosci 10(16):367CrossRefGoogle Scholar
  11. Liu SQ, Jie YX, Xu YC (2017) Prevention of mine-shaft failure by aquifer replenishment. J Test Eval 45(3):890–903CrossRefGoogle Scholar
  12. Lu HJ, Qi CC, Chen QS, Gan DQ, Xue ZL, Hu TJ (2018) A new procedure for recycling waste tailings as cemented paste backfill to underground stopes and open pits. J Clean Prod 188:601–612CrossRefGoogle Scholar
  13. Ma LQ, Jin ZY, Liang JM, Sun H, Zhang DS, Li P (2015) Simulation of water resource loss in short-distance coal seams disturbed by repeated mining. Environ Earth Sci 74(7):5653–5662CrossRefGoogle Scholar
  14. Miao XX, Huang YL, Ju F, Mao XB, Guo GL, Zhang JX (2012) Strata movement theory of dense backfill mining. J China Univ Min Technol 41(6):863–867Google Scholar
  15. Poulsen BA, Shen B (2013) Subsidence risk assessment of decommissioned bord-and-pillar collieries. Int J Rock Mech Min 60(6):312–320CrossRefGoogle Scholar
  16. Qi CC, Chen QS, Fourie A, Zhao JW, Zhang QL (2018a) Pressure drop in pipe flow of cemented paste backfill: experimental and modeling study. Powder Technol 333:9–18CrossRefGoogle Scholar
  17. Qi CC, Chen QS, Fourie A, Zhang QL (2018b) An intelligent modelling framework for mechanical properties of cemented paste backfill. Miner Eng 123:16–27CrossRefGoogle Scholar
  18. Qi CC, Fourie A, Chen QS (2018c) Neural network and particle swarm optimization for predicting the unconfined compressive strength of cemented paste backfill. Constr Build Mater 159:473–478CrossRefGoogle Scholar
  19. Qi CC, Fourie A, Chen QS, Zhang QL (2018d) A strength prediction model using artificial intelligence for recycling waste tailings as cemented paste backfill. J Clean Prod 183:566–578CrossRefGoogle Scholar
  20. Senapati PK, Mishra BK (2012) Design considerations for hydraulic backfilling with coal combustion products (CCPs) at high solids concentrations. Powder Technol 229:119–125CrossRefGoogle Scholar
  21. Wang HF, Cheng YP, Yuan L (2013) Gas outburst disasters and the mining technology of key protective seam in coal seam group in the Huainan coalfield. Nat Hazards 67(2):763–782CrossRefGoogle Scholar
  22. Ward CR, Nunt-Jaruwong S, Swanson J (2005) Use of mineralogical analysis in geotechnical assessment of rock strata for coal mining. Int J Coal Geol 64(1–2):156–171CrossRefGoogle Scholar
  23. Xu YC, Li XD, Jie YX (2014) Test on water-level stabilization and prevention of mine-shaft failure by means of groundwater injection. Geotech Test J 37(2):319–332CrossRefGoogle Scholar
  24. Yang JX, Liu CY, Yu B, Wu FF (2015) Calculation and analysis of stress in strata under gob pillars. J Cent South Univ 22(3):1026–1036CrossRefGoogle Scholar
  25. Yao ZS, Song HQ, Cheng H, Rong CX (2012) The experimental study on inner shift lining structure of freezing shaft in deep thick aquiferous soft rock. Life Sci 4(19):1839–1841Google Scholar
  26. Zhang JX, Li BY, Zhou N, Zhang Q (2016a) Application of solid backfilling to reduce hard-roof caving and longwall coal face burst potential. Int J Rock Mech Min 88:197–205CrossRefGoogle Scholar
  27. Zhang Q, Zhang JX, Han XL, Ju F, Tai Y, Li M (2016b) Theoretical research on mass ratio in solid backfill coal mining. Environ Earth Sci 75(7):1–11Google Scholar
  28. Zhang JX, Huang P, Zhang Q, Li M, Chen ZW (2017) Stability and control of room mining coal pillars—taking room mining coal pillars of solid backfill recovery as an example. J Cent South Univ 24(5):1121–1132CrossRefGoogle Scholar
  29. Zhao HJ, Ma FS, Xu JM, Zhang YM, Guo J (2012) Shaft deformation and failure due to rock mass movement induced by underground backfill mining of a metal mine. Chin J Geotech Eng 34(2):340–348Google Scholar
  30. Zhou N, Zhang JX, Yan H, Li M (2017) Deformation behavior of hard roofs in solid backfill coal mining using physical model. Energies 10(4):557CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Hao Yan
    • 1
    • 2
  • Jixiong Zhang
    • 2
    Email author
  • Sheng Zhang
    • 1
    • 2
  • Nan Zhou
    • 1
    • 2
  1. 1.School of minesChina University of Mining & TechnologyXuzhouChina
  2. 2.State Key Laboratory of Coal Resources and Safe MiningChina University of Mining & TechnologyXuzhouChina

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