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Model test study on overburden settlement law in coal seam backfill mining based on fiber Bragg grating technology

  • Chunde PiaoEmail author
  • Dong Wang
  • Hui Kang
  • Hu He
  • Chaoqi Zhao
  • Wenyuan Liu
ISMSSE 2018
  • 40 Downloads
Part of the following topical collections:
  1. Mine Safety Science and Engineering

Abstract

Taking section 3600 of Pingzhuangxi coal mine as the prototype, we made the test model based on the theory of similarity, used the fiber Bragg grating (FBG) to study the deformation characteristics of overburden in the process of coal seam backfill mining and analyze the correlation between filling material and overburden settlement, and obtained the deformation law of overburden in the seam filling area and the coal pillar area. The results show that due to the impact of compression characteristics of filling materials, the intermediate roof, and the breakage of key strata, the overburden deformation in the seam filling area can be divided into 4 stages, and the coal pillar overburden deformation can be divided into 3 stages according to the slope of strain distribution curve of overburden during backfill mining. Based on the slope of the strain curve of mining overburden and the strain value measured by FBG sensors, this paper identified the stability of rock stratum, proposed a FBG-based method to determine the height of the water-flowing fractured zone, compared it with the existing calculation methods to verify its rationality, and came to a conclusion that this new method can be promoted for future calculation.

Keywords

Fiber Bragg grating (FBG) Backfill mining Mining overburden Water-flowing fractured zone Coal pillar 

Notes

Funding information

The work is funded by the Jiangsu Natural Science Foundation of China (BK20171187), Xuzhou Science and Technology Planning Project (KC16SQ186), the Open Projects of Research Center of Coal Resources Safe Mining and Clean Utilization, Liaoning (LNTU16KF06), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (2018).

References

  1. Barbato J, Hebblewhite B, Mitra R, Mills K (2016) Prediction of horizontal movement and strain at the surface due to longwall coal mining. Int J Rock Mech Min Sci 84:105–118CrossRefGoogle Scholar
  2. Emad MZ, Mitri H, Kelly C (2014) Effect of blast-induced vibrations on fill failure in vertical block mining with delayed backfill. Can Geotech J 51:975–983CrossRefGoogle Scholar
  3. 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
  4. Guo GL, Miao XX, Zha JF, Ma ZG, Zhou ZY (2008) Preliminary analysis of the effect of controlling mining subsidence with waste stow for long wall workface. Sciencepaper Online 3(11):805–809Google Scholar
  5. Helinski M, Fahey M, Fourie A (2007) Numerical modeling of cemented mine backfill deposition. J Geotech Geoenviron 133(10):1308–1319CrossRefGoogle Scholar
  6. Howladar MF, Karim MM (2015) The selection of backfill materials for Barapukuria underground coal mine, Dinajpur, Bangladesh: insight from the assessments of engineering properties of some selective materials. Environ Earth Sci 73:6153–6165CrossRefGoogle Scholar
  7. Huang AB, Wang C, Lee JT, Ho YT (2016) Applications of FBG-based sensors to ground stability monitoring. J Rock Mech Geotech Eng 8:513–520CrossRefGoogle Scholar
  8. Ju JF, Xu JL (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 78:27–35CrossRefGoogle Scholar
  9. Liu XF, Wang EY (2018) Study on characteristics of EMR signals induced from fracture of rock samples and their application in rockburst prediction in copper mine. J Geophys Eng 15(3):909–920CrossRefGoogle Scholar
  10. Liu HL, Yang TH, Zhang BH, Li Y, Hou XG (2017) Influence factors of overlying coal strata falling and mine pressure behaviours in western coal mines. J China Coal Soc 42(2):460–469Google Scholar
  11. Liu XF, Yang S, Ding XH, Zhang C, Wang XR, Zhou B (2018) Physical simulation and monitoring the deformation and fracture of roadway in coal mining. Adv Civ Eng 2607957:1–10Google Scholar
  12. Miao XX, Qian MG (2009) Research on green mining of coal resources in China: current status and future prospects. Journal of Mining and Safety Engineering 26(1):1–14Google Scholar
  13. Nan SQ, Gao Q (2011) Application of distributed optical fiber sensor technology based on BOTDR in similar model test of backfill mining. Procedia Earth Planet Sci 2:34–39CrossRefGoogle Scholar
  14. Sui WH, Zhang DY, Cui ZD, Wu ZY, Zhao QJ (2015) Environmental implications of mitigating overburden failure and subsidence using paste-like backfill mining: a case study. Int J Min Reclam Environ 29(6):521–543CrossRefGoogle Scholar
  15. Sun YK, Li Q, Li XY, Yang DX (2015) Progress of real-time monitoring technology in oil and gas industry based on fiber Bragg grating sensing. Sci Technol Rev 33(13):84–91Google Scholar
  16. Thompson BD, Bawden WF, Grabinsky MW (2012) In situ measurements of cemented paste backfill at the cayeli mine. Can Geotech J 49:755–772CrossRefGoogle Scholar
  17. Wang JC, Yang SL (2010) Research on support-rock system in solid backfill mining methods. J China Coal Soc 35(11):1821–1826Google Scholar
  18. Xing ML (2006) Water disasters and impact on phreatic water table by full-mechanized top-coal caving in desert bottomland. D, China University of Mining and Technology, XuzhouGoogle Scholar
  19. Xu JL, Qian MG (2000) Method to distinguish key strata in overburden. J China Univ Min Technol 29(5):463–467Google Scholar
  20. Yang YG, Wu QW, Shi YJ, Wang HZ (2014) Calculation on the height of water flowing fractured zone in a coal mine. Sci Technol Rev 32(3):34–38Google Scholar
  21. Zha JF, Guo GL, Liu YX, Wu K (2009) The nonlinear features of waste deformation and its impaction on strata movement. J China Coal Soc 34(8):1071–1075Google Scholar
  22. Zhang Z (2010) Research on control technology of west Pingzhuang open pit and underground cooperated mining. D, Liaoning Technical University, FuxinGoogle Scholar
  23. Zhang Q, Zhang JX, Ju F, Li M, Geng DK (2014) Backfill body’s compression ratio design and control theory research in solid back fill coal mining. J China Coal Soc 39(1):64–71Google Scholar
  24. Zhang JX, Sun Q, Zhou N, Jiang HQ, Germain D, Abro S (2016) Research and application of roadway backfill coal mining technology in western coal mining area. Arab J Geosci 558:1–10Google Scholar
  25. Zhao TB, Fu ZY, Li G (2018) In situ investigation into fracture and subsidence of overburden strata for solid backfill mining. Arab J Geosci 398:1–11Google Scholar

Copyright information

© Saudi Society for Geosciences 2019

Authors and Affiliations

  1. 1.School of Resources and GeosciencesChina University of Mining and TechnologyXuzhouChina
  2. 2.School of Mining EngineeringLiaoning University of Engineering and TechnologyFuxinChina

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