Geotechnical and Geological Engineering

, Volume 37, Issue 5, pp 3739–3748 | Cite as

Study on Optimization of Roadway Position in Pre-mining Upper Layered Concave–Convex Coal Body

  • Wei Sun
  • Zhongcheng QinEmail author
  • Qinghai Li
  • Guangbo Chen
  • Tan Li
Original Paper


Reasonable roadway layout is of great significance for mine safety and high efficiency production. The “concave–convex” coal body formed by pre-mining upper strip mining in Jinqiao Coal Mine, in order to recover the remaining coal resources, the selection of reasonable roadway location has become the first problem to be solved. In this paper, by means of theoretical calculation and numerical simulation, the failure range of plastic zone of floor and stress distribution law after upper layer mining are studied. At the same time, the stress distribution and displacement of roadway with different coal pillar width are analyzed. The results show that: After the upper layer mining, the failure depth of the floor is 6.9 m, the “ voussoir beam” is formed at the edge of the goaf, the stress distribution in the coal pillar presents “double hump”, the roadway is arranged in the middle of the coal pillar, the stress concentration is the smallest, and the deformation of the roadway is the smallest. Therefore, the optimum layout position of the mining roadway is determined. Through the field monitoring, the roadway deformation within the allowable range, the desired purpose has been achieved. It can provide theoretical support for the selection of roadway location under similar conditions.


“Concave–convex “ coal body Theoretical analysis Numerical simulation Roadway position 



This study was supported by the National Natural Science Foundation of China [Grant No. 51604164]; Science and Technology Program of Shandong Colleges and Universities [Grant No. J18KA185].


  1. Chen H, Chen X, Li J, Wang L (2018) Stress evolution characteristics of lower slice coal body during mining the thick coal seam. Geotech Geol Eng 36(5):3223–3234CrossRefGoogle Scholar
  2. Deng XJ, Zhang JX, Kang T, Han X (2016) Strata behavior in extra-thick coal seam mining with upward slicing backfilling technology. Int J Min Sci Technol 26(4):587–592CrossRefGoogle Scholar
  3. Deng XJ, Zhang JX, Zhou N, De WB, Wang CT (2017) Upward slicing longwall-roadway cemented backfilling technology for mining an extra-thick coal seam located under aquifers: a case study. Environ Earth Sci 76(23):789CrossRefGoogle Scholar
  4. Fan G, Zhang D, Zhou L (2011) Suitable layout of gate roads related to slice mining in an ultra-thick unstable coal seam. Min Sci Technol 21(4):563–566 (in China) Google Scholar
  5. Li S, Shuang H, Wang H (2016a) Determining the rational layout parameters of the lateral high drainage roadway serving for two adjacent working faces. Int J Min Sci Technol 26(5):795–801CrossRefGoogle Scholar
  6. Li Z, Dou L, Cai W, Wang G, Ding Y, Kong Y (2016b) Roadway stagger layout for effective control of gob-side rock bursts in the longwall mining of a thick coal seam. Rock Mech Rock Eng 49(2):621–629CrossRefGoogle Scholar
  7. Liu LM, Zhang JP (2018) Study on micro-expansive concrete-filled steel tube support for controlling the stability of surrounding rock in deep roadway. Geotech Geol Eng 36(4):2343–2350CrossRefGoogle Scholar
  8. Song ZF, Sun YJ, Lin X (2018) Research on in situ stress measurement and inversion, and its influence on roadway layout in coal mine with thick coal seam and large mining height. Geotech Geol Eng 36(3):1907–1917CrossRefGoogle Scholar
  9. Tan YL, Zhao TB, Xiao YX (2010) In situ investigations of failure zone of floor strata in mining close distance coal seams. Int J Rock Mech Min Sci 47(5):865–870CrossRefGoogle Scholar
  10. Wang LG, Zhang JH, Duan MJ et al (2015) Roadway layout for recycling residual coal pillar in room-and-pillar mining of thick coal seam. Int J Min Sci Technol 25(5):729–734CrossRefGoogle Scholar
  11. Wang Q, Gao H, Jiang B, Li S, He M, Wang D et al (2017) Research on reasonable coal pillar width of roadway driven along goaf in deep mine. Arab J Geosci 10(21):466CrossRefGoogle Scholar
  12. Wei XQ, Bai HB, Rong HR, Jiao Y, Zhang BY (2011) Research on mining fracture of overburden in close distance multi-seam. Procedia Earth Planet Sci 2(1):20–27CrossRefGoogle Scholar
  13. Zhang YQ, Sun LL, Zhang WZ, Cao LD (2013a) The numerical simulation and supporting design of gob-side entry retaining in gradient medium thick coal seam. Appl Mech Mater 368–370:4Google Scholar
  14. Zhang H, Cao J, Tu M (2013b) Floor stress evolution laws and its effect on stability of floor roadway. Int J Min Sci Technol 23(5):631–636CrossRefGoogle Scholar
  15. Zhang J, Jiang F, Zhu S et al (2016) Width design for gobs and isolated coal pillars based on overall burst-instability prevention in coal mines. J Rock Mech Geotech Eng 8(4):551–558CrossRefGoogle Scholar
  16. Zhang W , Zhang DS, Qi DH et al (2018) Floor failure depth of upper coal seam during close coal seams mining and its novel detection method. Energy Explor Exploit 36(5):1265–1278CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Wei Sun
    • 1
  • Zhongcheng Qin
    • 1
    Email author
  • Qinghai Li
    • 1
  • Guangbo Chen
    • 1
  • Tan Li
    • 1
  1. 1.College of Mining and Safety EngineeringShandong University of Science and TechnologyQingdaoChina

Personalised recommendations