Mechanism of Coordinate Anchorage Support of Bolt-Single Anchor Cable for Gob-Side Entry Roof

  • Hong-chao Li
  • Ke DingEmail author
  • Qiang Xu
  • Qiang Zhang
Original Paper


Although fully mechanized caving mining technology has been widely used in China for thick seam mining, the support mechanism for a gob-side entry roof remains unclear under this condition. Taking the No. 3304 mining face of Dongtan Coal Mine as the engineering background, this paper seeks to solve this problem. First, the coordinate support mechanism of a bolt-single anchor cable for a gob-side entry roof is analyzed from two aspects: the bearing capacity of single anchor cable and prestress coordination of a bolt-angle anchor cable. Then, the anchoring parameters are optimized combined with FLAC3D numerical simulation followed by field practice. Results of the field practice show that the coordinate support effect was fully utilized when applying bolt-single anchor cable support. The deformation of roadway surrounding rock was effectively controlled.


Fully mechanized caving Gob-side entry Bearing capacity Prestress Bolt-single anchor cable 


  1. Bobet A, Einstein HH (2011) Tunnel reinforcement with rockbolts. Tunn Undergr Space Technol Incorp Trenchless Technol Res 26(1):100–123CrossRefGoogle Scholar
  2. Carranza-Torres C (2009) Analytical and numerical study of the mechanics of rockbolt reinforcement around tunnels in rock masses. Rock Mech Rock Eng 42(2):175–228CrossRefGoogle Scholar
  3. Chao ZG, Lian HF (2016) Pillar width determination and surrounding rocks control of gob-side entry with large cross-section and fully-mechanized mining. Rock Soil Mech 37(6):1721Google Scholar
  4. Craig P, Serkan S, Hagan P, Hebblewhite B, Vandermaat D (2016) Investigations into the corrosive environments contributing to premature failure of Australian coal mine rockbolts. Int J Min Sci Technol 26(1):59–64CrossRefGoogle Scholar
  5. Deng Y (2010) Analysis and application in controlling surrounding rock of support reinforced roadway in gob-side entry with fully mechanized mining. Int J Min Sci Technol 20(6):839–845Google Scholar
  6. Fahimifar A, Ranjbarnia M (2009) Analytical approach for the design of active grouted rockbolts in tunnel stability based on convergence-confinement method. Tunn Undergr Space Technol 24(4):363–375CrossRefGoogle Scholar
  7. Gong P, Ma Z, Zhang RR, Ni X, Liu F (2017) Surrounding rock deformation mechanism and control technology for gob-side entry retaining with fully mechanized gangue backfilling mining: a case study. Shock Vib 4:1–15Google Scholar
  8. He M, Gao Y, Yang J, Gong W (2017) An innovative approach for gob-side entry retaining in thick coal seam longwall mining. Energies 10(11):1785CrossRefGoogle Scholar
  9. Kang HP, Lin J, Fan MJ (2015) Investigation on support pattern of a coal mine roadway within soft rocks—a case study. Int J Coal Geol 140(1):31–40CrossRefGoogle Scholar
  10. Li H, Hao Y, Ben S, Yang Q (2015) Support failure of a high-stress soft-rock roadway in deep coal mine and the equalized yielding support technology: a case study. Int J Coal Sci Technol 2(4):279–286CrossRefGoogle Scholar
  11. Ning J, Yuan X, Ma T, Li J (2017) Pseudo arc-length numerical algorithm for computational dynamics. Lixue Xuebao/Chin J Theor Appl Mech 49(3):703–715Google Scholar
  12. Özgen Karacan C (2010) Prediction of porosity and permeability of caved zone in longwall gobs. Transp Porous Med 82(2):413–443CrossRefGoogle Scholar
  13. Recio-Gordo D, Jimenez R (2012) A probabilistic extension to the empirical ALPS and ARMPS systems for coal pillar design. Int J Rock Mech Min Sci 52(3):181–187CrossRefGoogle Scholar
  14. Su H, Bai J, Yan S, Chen Y, Zhang Z (2015) Study on gob-side entry retaining in fully-mechanized longwall with top-coal caving and its application. Int J Min Sci Technol 25(3):503–510CrossRefGoogle Scholar
  15. Tan YL, Yu FH, Ning JG, Zhao TB (2015) Design and construction of entry retaining wall along a gob side under hard roof stratum. Int J Rock Mech Min Sci 77:115–121Google Scholar
  16. Tan YL, Yu FH, Ning JG, Zhao TB (2016) Adaptability theory of roadside support in gob-side entry retaining and its supporting design. J China Coal Soc 41(2):376–382Google Scholar
  17. Xie HP, Ju Y, Gao F, Gao M, Zhang R (2017) Groundbreaking theoretical and technical conceptualization of fluidized mining of deep underground solid mineral resources. Tunn Undergr Space Technol 67:68–70CrossRefGoogle Scholar
  18. Zhang Y, Zhang B, Zhang CL, Zhao JJ, Liu JK (2013) Study of the dynamic evolution rules and distribution pattern of mining-induced fractures of thick coal seam. J China Univ Min Technol 42(6):935–940Google Scholar
  19. Zhang Z, Bai J, Chen Y, Yan S (2015) An innovative approach for gob-side entry retaining in highly gassy fully-mechanized longwall top-coal caving. Int J Rock Mech Min Sci 80:1–11Google Scholar
  20. Zhu CQ, Miao XX, Liu B (2008) Mechanical analysis on deformation of surrounding rock with road-in packing of gob-side entry retaining in fully-mechanized sub-level caving face. Int J Coal Sci Technol 14(1):24–28Google Scholar

Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.College of Ming and Safety EngineeringShandong University of Science and TechnologyQingdaoChina

Personalised recommendations