Geomechanics and Engineering

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Deformation process and prediction of filling gangue: A case study in China

  • Wang, Changxiang (College of Mining and Safety Engineering, Shandong University of Science and Technology) ;
  • Lu, Yao (College of Mining and Safety Engineering, Shandong University of Science and Technology) ;
  • Li, Yangyang (College of Mining and Safety Engineering, Shandong University of Science and Technology) ;
  • Zhang, Buchu (College of Mining and Safety Engineering, Shandong University of Science and Technology) ;
  • Liang, Yanbo (College of Mining and Safety Engineering, Shandong University of Science and Technology)
  • Received : 2018.12.29
  • Accepted : 2019.07.08
  • Published : 2019.07.20
⟨ Previous Next ⟩

Abstract

Gangue filling in the goaf is an effective measure to control the surface subsidence. However, due to the obvious deformation of gangue compression, the filling effect deserves to be further studied. To this end, the deformation of coal gangue filling in the goaf is analyzed by theoretical analysis, large-scale crushed rock compression test, and field investigation. Through the compression test of crushed rock, the deformation behaviour characteristics and energy dissipation characteristics is obtained and analysed. The influencing factors of gangue filling and predicted amount of main deformation are summarized. Besides, the predicted equation and filling subsidence coefficients of gangue are obtained. The gangue filling effect was monitored by the movement observation of surface rock. Gangue filling can support the roof of the goaf, effectively control the surface subsidence with little influence on the ground villages. The premeter and equations of the main deformation in the gangue filling are verified, and the subsidence coefficient is further reduced by adding cemented material or fine sand. This paper provides a practical and theoretical reference for further development of gangue filling.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

References

  1. An, B., Miao, X., Zhang, J., Ju, F. and Zhou, N. (2016), "Overlying strata movement of recovering standing pillars with solid backfilling by physical simulation", Int. J. Min. Sci. Technol., 26(2), 301-307. https://doi.org/10.1016/j.ijmst.2015.12.017.
  2. Bishop, A.W. and Henkel, D.J. (1962), The Measurement of Soil Properties in the Triaxial Test, Edward Arnold Ltd., London, U.K.
  3. Genis, M., Akcin, H. and Aydan, O. (2018), "Investigation of possible causes of sinkhole incident at the Zonguldak Coal Basin, Turkey", Geomech. Eng., 16(2), 177-185. https://doi.org/10.12989/gae.2018.16.2.177.
  4. Ghabraie, B., Ren, G., Barbato, J. and Smith, J.V. (2017), "A predictive methodology for multi-seam mining induced subsidence", Int. J. Rock Mech. Min. Sci., 93, 280-294. https://doi.org/10.1016/j.ijrmms.2017.02.003.
  5. Gu, H., Tao, M., Wang, J., Jiang, H., Li, Q. and Wang, W (2018), "Influence of water content on dynamic mechanical properties of coal", Geomech. Eng., 16(2), 85-95. https://doi.org/10.12989/gae.2018.16.2.085.
  6. Guo, W. (2013), Backfill Mining Technology in Coal Mines, China Coal Industry Publishing House, Beijing, China.
  7. Guo, Y., Zhang, Y.Y. and Cheng, F.Q. (2014), "Industrial development and prospect about comprehensive utilization of coal gangue", Ciesc J., 65(7), 2443-2453.
  8. Hu, C.M., Wang, X.Y., Mei, Y., Yuan, Y.L. and Zhang, S.S. (2018), "Compaction techniques and construction parameters of loess as filling material", Geomech. Eng., 15(6), 1143-1151. https://doi.org/10.12989/gae.2018.15.6.1143.
  9. Ishwar, S.G. and Kumar, D. (2017), "Application of DInSAR in mine surface subsidence monitoring and prediction", Curr. Sci., 112(1), 46-51. https://doi.org/10.18520/cs/v112/i01/46-51
  10. Jaouhar, E.M., Li, L. and Aubertin, M. (2018), "An analytical solution for estimating the stresses in vertical backfilled stopes based on a circular arc distribution", Geomech. Eng., 15(3), 889-898. https://doi.org/10.12989/gae.2018.15.3.889.
  11. Ju, J. and Xu, J. (2015), "Surface stepped subsidence related to top-coal caving longwall mining of extremely thick coal seam under shallow cover", Int. J. Rock Mech. Min. Sci., 78, 27-35. http://dx.doi.org/10.1016%2Fj.ijrmms.2015.05.003 https://doi.org/10.1016/j.ijrmms.2015.05.003
  12. Li, J., Huang, Y., Qiao, M., Chen, Z., Song, T., Kong, G., Gao, H. and Guo, L (2018), "Effects of water soaked height on the deformation and crushing characteristics of loose gangue backfill material in solid backfill coal mining", Processes, 6(6), 64. https://doi.org/10.3390/pr6060064.
  13. Li, M., Zhang, J. and Gao, R. (2016), "Compression characteristics of solid wastes as backfill materials", Adv. Mater. Sci. Eng., 1-7. http://dx.doi.org/10.1155/2016/2496194.
  14. Li, M., Zhang, J., Huang, Y. and Zhou, N. (2017), "Effects of particle size of crushed gangue backfill materials on surface subsidence and its application under buildings", Environ. Earth Sci., 76(17), 603. https://doi.org/10.1007/s12665-017-6931-z.
  15. Li, Y., Zhang, S. and Zhang, X. (2018), "Classification and fractal characteristics of coal rock fragments under uniaxial cyclic loading conditions", Arab. J. Geosci., 11, 201-212. https://doi.org/10.1007/s12517-018-3534-2.
  16. Liu, X.S., Ning, J.G., Tan, Y.L., Xu, Q. and Fan, D.Y. (2018), "Coordinated supporting method of gob-side entry retaining in coal mines and a case study with hard roof", Geomech. Eng., 15(6), 1173-1182. https://doi.org/10.12989/gae.2018.15.6.1173.
  17. Miao, X.X., Mao, X.B., Hu, G.W. and Ma, Z.G. (1997), "Research on broken expand and press solid characteristics of rocks and coals", J. Exp. Mech., 12(3), 394-399.
  18. Shen, B. and Barton, N. (2018), "Rock fracturing mechanisms around underground openings", Geomech. Eng., 16(1), 35-47. https://doi.org/10.12989/gae.2018.16.1.035.
  19. State Administration of Coal Industry (2017), Regulations for the Preservation and Mining of Coal Pillars in Buildings, Water Bodies, Railways and Main Roadways, Coal Industry Publishing House, Beijing, China.
  20. Su, C.D., Gu, M., Tang, X. and Guo, W.B. (2012), "Experiment study of compaction characteristics of crushed stones from coal seam roof", Chin. J. Rock Mech. Eng., 31(1), 18-26. https://doi.org/10.3969/j.issn.1000-6915.2012.01.003
  21. Venticinque, G., Nemcik, J. and Ren, T. (2014), "A new fracture model for the prediction of longwall caving characteristics", Int. J. Min. Sci. Technol., 24(3), 369-372. https://doi.org/10.1016/j.ijmst.2014.03.014.
  22. Xuan, D. and Xu, J. (2017), "Longwall surface subsidence control by technology of isolated overburden grout injection", Int. J. Rock Mech. Min. Sci. Technol., 27(5), 813-818. https://doi.org/10.1016/j.ijmst.2017.07.014.
  23. Yan, C., Wan, Q., Xu, Y., Xie, Y. and Yin, P. (2018), "Experimental study of barrier effect on moisture movement and mechanical behaviors of loess soil", Eng. Geol., 240, 1-9. https://doi.org/10.1016/j.enggeo.2018.04.007.
  24. Yavuz, H. (2004), "An estimation method for cover pressure reestablishment distance and pressure distribution in the goaf of longwall coal mines", Int. J. Rock Mech. Min. Sci., 41(2), 193- 205. https://doi.org/10.1016/S1365-1609(03)00082-0.
  25. Yu, W.J. and Wang, W.J. (2011), "Strata movement induced by coal-pillar under three circumstances exchanged by gangue backfill and quadratic stability law", Chin. J. Rock Mech. Eng., 30(1), 105-112.
  26. Zhang, C., Zhan, X. and Yang, C. (2013), "Mesoscopic simulation of strength and deformation characteristics of coarse grained materials", Rock Soil Mech., 34(7), 2077-2083.
  27. Zhang, J., Li, B., Zhou, N. and Zhang, Q. (2016), "Application of solid backfilling to reduce hard-roof caving and longwall coal face burst potential", Int. J. Rock Mech. Min. Sci., 88, 197-205. https://doi.org/10.1016/j.ijrmms.2016.07.025
  28. Zhang, X., Lin, J., Liu, J., Li, F. and Pang, Z. (2017), "Investigation of hydraulic-mechanical properties of paste backfill containing coal gangue-fly ash and its application in an underground coal mine", Energies, 10(9), 1309. https://doi.org/10.3390/en10091309.
  29. Zhang, Z. (2008), "Analysis of plastic deformation and energy property of marble under pseudo-triaxial compression", Chin. J. Rock Mech. Eng., 27(2), 273-280. https://doi.org/10.3321/j.issn:1000-6915.2008.02.007
  30. Zhang, B. and Meng, Z. (2019), "Experimental study on floor failure of coal mining above confined water", Arab. J. Geosci., 12(4), 114-123. https://doi.org/10.1007/s12517-019-4250-2.
  31. Zhang, S., Li, Y., Shen, B., Sun, X. and Gao, L. (2019), "Effective evaluation of pressure relief drilling for reducing rock bursts and its application in underground coal mines", Int. J. Rock Mech. Min. Sci., 114, 7-16. https://doi.org/10.1016/j.ijrmms.2018.12.010.
  32. Zhou, N., Zhang, J., Yan, H. and Li, M. (2017), "Deformation behavior of hard roofs in solid backfill coal mining using physical models", Energies, 10(4), 557. https://doi.org/10.3390/en10040557.