Advertisement

A Study on the Mechanism and Controlling Techniques of Roadway Deformations Under High In Situ Stress Conditions

  • Chao YuanEmail author
  • Weijun Wang
  • Cong Huang
Original Paper
  • 24 Downloads

Abstract

To successfully control the roadway deformations under high in situ stress conditions, first, field investigations were conducted on the haulage roadway deformation at the -850 section in Qu Jiang mine. Besides, an analysis was performed on the roadway deformation characteristics. Moreover, four supporting strategies were proposed based on the geological conditions and the roadway deformation characteristics. And these strategies were simulation using FLAC3D. Furthermore, the supporting mechanism of the first, the second and grouting supports was analyzed. The first supporting was the preliminary support installed at the stress release stage of surrounding rocks, and limited deformations were permitted in this stage. To permanently stabilize the roadway, the second supporting then was installed to restrain the creep deformation and improve the strength and integrity of the fissured rock masses. Grouting, which can infill and cement the fissures, was used to improve the anchor forces of the bolts and cable and promote the delivery and diffusion of the supporting resistances. Simulation results indicate that roadway deformations are successfully controlled by the proposed strategies where bolts, steel nets, concrete spraying, cables, and grouting were applied.

Keywords

Large deformation High in situ stress Numerical simulation Roadway supporting 

Notes

Acknowledgements

The study is supported by the National Natural Science Foundation of China (Grant Numbers 51804109; 51434006; 51874130) and the Scientific Research Foundation for Doctor of Hunan University of Science and Technology (Grant Number E51851).

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflicts of interest.

References

  1. Cao RH, Cao P, Lin H (2016) Support technology of deep roadway under high stress and its application. Int J Min Sci Technol 26:787–793CrossRefGoogle Scholar
  2. Chen DF, Feng XT, Xu DP et al (2015) An equivalent numerical method for evaluating the reinforcing effectiveness of grouted bolts. Rock Soil Mech 36(4):1195–1204Google Scholar
  3. Chen SM, Wu AX, Wang YM et al (2018) Study on repair control technology of soft surrounding rock roadway and its application. Eng Fail Anal 92:443–455CrossRefGoogle Scholar
  4. Fang XQ, Zhao JJ, Hong MY (2012) Failure mechanism and control measure of roadway deformation with fractured surrounding rock in deep mine. J Min Saf Eng 29(1):1–7Google Scholar
  5. Guo PF, He MC, Wang J (2018) Study on coupling support technique in the roadway of Hecaogou no. 2 coal mine with soft roadway of large deformation. Geotech Geol Eng 36:1161–1173Google Scholar
  6. Jiao YY, Song L, Wang XZ et al (2013) Improvement of the U-shaped steel sets for supporting the roadways in loose thick coal seam. Int J Rock Mech Min Sci 60:19–25CrossRefGoogle Scholar
  7. Kang HP, Lin J, Yang JH et al (2011) Stress distribution and synthetic reinforcing technology for chamber group with soft and fractured surrounding rock. Chin J Geotech Eng 33(5):808–814Google Scholar
  8. Li SC, Wang Q, Zhao YX et al (2015a) Model test study on surrounding rock deformation and failure mechanisms of deep roadways with thick top coal. Tunn Undergr Space Technol 47:52–63CrossRefGoogle Scholar
  9. Li GC, Sun H, Zhang N et al (2015b) Application research on new high-strength anchor cable bundle based on the shear stress distribution of anchor cable. J China Coal Soc 40(5):1008–1014Google Scholar
  10. Li ZP, Xu JC, Du JQ (2016) Application of bolt–mesh–cable coupling support with high convex strip in deep roadways. Electr J Geotech Eng 21(12):4463–4473Google Scholar
  11. Liu HT, Li JQ (2015) Research on timeliness of coordination support of bolting-mesh-shotcreting-grouting in deep roadway. J China Coal Soc 40(10):2347–2354Google Scholar
  12. Ma NJ, Zhao XD, Zhao ZQ et al (2015) Stability analysis and control technology of mine roadway roof in deep mining. J China Coal Soc 40(10):2287–2295Google Scholar
  13. Meng QB, Han LJ, Qiao WG et al (2016) Supporting effect and application of bolt-net-anchor coupling support under extremely weak cementation formation. J Min Saf Eng 33(5):770–778Google Scholar
  14. Pan R, Wang Q, Jiang B et al (2017) Failure of bolt support and experimental study on the parameters of bolt-grouting for supporting the roadways in deep coal seam. Eng Fail Anal 80:218–233CrossRefGoogle Scholar
  15. Song YJ, Han LJ, Gao JM (2013) Instability mechanisms and dynamic superposition coupling support in extremely fractured and soft rock roadway. J Min Saf Eng 30(3):355–362Google Scholar
  16. Tao WB, Chen TL, Tang B (2019) Response law of horizontal principal stress to mechanical characteristics of anchorage zone. J Harbin Eng Univ 40(6):1–7Google Scholar
  17. Wang C, Wang Y, Lu S (2000) Deformational behaviour of roadways in soft rocks in underground coal mines and principles for stability control. Int J Rock Mech Min Sci 37:937–946CrossRefGoogle Scholar
  18. Wang HW, Jiang YD, Xue S et al (2015) Assessment of excavation damaged zone around roadways under dynamic pressure induced by an active mining process. Int J Rock Mech Min Sci 77:265–277CrossRefGoogle Scholar
  19. Wang FT, Zhang C, Wei SF et al (2016) Whole section anchor–grouting reinforcement technology and its application in underground roadways with loose and fractured surrounding rock. Tunn Undergr Space Technol 51:133–143CrossRefGoogle Scholar
  20. Wang YX, Shan SB, Cao P et al (2017) Numerical simulation on unloading deformation and supporting effect of soft rock excavation. J Hefei Univ Technol 40(12):1643–1648Google Scholar
  21. Yan H, He FL, Wang SG (2014) Safety control and evaluation of roadway with super-large cross-section and soft-weak thick coal roof. Chin J Rock Mech Eng 33(5):1014–1023Google Scholar
  22. Yang SQ, Chen M, Jing HW et al (2017) A case study on large deformation failure mechanism of deep soft rock roadway in Xin’An coals mine, China. Eng Geol 217:89–101CrossRefGoogle Scholar
  23. Yu WJ, Wang WJ, Chen XY et al (2015) Field investigations of high stress soft surrounding rock sand deformation control. J Rock Mech Geotech Eng 7:421–433CrossRefGoogle Scholar
  24. Yu WJ, Wu GS, An BF (2018) Investigations of support failure and combined support. Geotech Geol Eng 36:3911–3929CrossRefGoogle Scholar
  25. Zhang JW (2017) Theoretical analysis on failure zone of surrounding rock in deep large-scale soft rock roadway. J China Univ Min Technol 46(2):292–299Google Scholar
  26. Zheng GQ, Lian HQ, Ling BC et al (2013) Measurement of geostress in deep coal seams in Guqiao coalmine of Huainan coal field. J Liaoning Tech Univ (Nat Sci) 32(10):1324–1328Google Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.School of Resources, Environment and Safety EngineeringHunan University of Science and TechnologyXiangtanChina
  2. 2.Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal MinesXiangtanChina
  3. 3.Hunan Key Laboratory of Safe Mining Techniques of Coal MinesXiangtanChina

Personalised recommendations