Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Model of stress distribution during coal roadway excavation and its numerical validation

  • 25 Accesses

Abstract

This paper establishes a mechanical model of the stress distribution in front of the driving face during coal roadway excavation. Theoretical research shows that the stress state in the plastic zone of the driving face is consistent with the limit equilibrium equation, and the elastic zone is in accordance with the equilibrium equation based on elasticity mechanics. Based on this improved mechanical state solution model, different coal material constitutive hypotheses are used for the analysis. The width of the plastic zone calculated under the brittle-perfectly elastic model can reach 2–5 times the height of the roadway, and the stress concentration coefficient can reach two or more times. 3DEC numerical simulation software was used to simulate the stress distribution of the heading face. The results of the simulation are similar to those of the theoretical analysis. Compared with the elastic-perfectly plastic model, the calculated results of the brittle-perfectly elastic model are more consistent with the numerical simulation results. The heading face coal during roadway excavation shows obvious damage, and the strength characteristics of the coal decrease.

This is a preview of subscription content, log in to check access.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8

References

  1. Accident inquiry system of the State Administration of Work Safety in China (n.d.) Available at: http://www.stats.gov.cn, last Accessed 14 September 2018

  2. Baghbanan A, Jing L (2008) Stress effects on permeability in a fractured rock mass with correlated fracture length and aperture. Int J Rock Mech Min Sci 45:1320–1334

  3. Beamish BB, Crosdale PJ (1998) Instantaneous outbursts in underground coal mines: an overview and association with coal type. Int J Coal Geol 35:27–55

  4. Bustin RM, Clarkson CR (1998) Geological controls on coalbed methane reservoir capacity and gas content. Int J Coal Geol 38:3–26

  5. Cattaneo C, Manera M, Scarpa E (2011) Industrial coal demand in China: a provincial analysis. Resour Energy Econ 33:12–35

  6. Chatterjee R, Pal PK (2010) Estimation of stress magnitude and physical properties for coal seam of Rangamati areaRaniganj coalfield, India. Int J Coal Geol 81:25–36

  7. Dong LJ, Li XB (2011) Interval non-probabilistic reliability method for surrounding jointed rock mass stability of underground caverns [J]. Chin J Geotech Eng 33(7):1007–1013

  8. Dong L, Tong X, Li X (2018a) Some developments and new insights of environmental problems and deep mining strategy for cleaner production in mines [J]. J Clean Prod 210:1562–1578

  9. Dong L, Wang J, Li X, Peng K (2018b) Dynamic stability analysis of rockmass: a review. Adv Civil Eng 2018:1–22. https://doi.org/10.1155/2018/4270187

  10. Ettinger IL (1952) Index for susceptibility of coal to gas and coal outbursts. Ugol 10:31–34

  11. Gale WJ, Blackwood RL (1987) Stress distributions and rock failure around coal mine roadways. Int J Rock Mech Min Sci Geomech Abstr 24:165–173

  12. Hu QT (2007) Mechanical mechanism of coal and gas outburst process, PhD Thesis, China University of Mining and Technology, Beijing

  13. Hu QT, Wen GC (2013) Mechanics mechanism of coal and gas outburst. Science Press, Beijing

  14. Islam MR, Shinjo R (2009) Numerical simulation of stress distributions and displacements around an entry roadway with igneous intrusion and potential sources of seam gas emission of the Barapukuria coal mine, NW Bangladesh. Int J Coal Geol 78(4):249–262

  15. Jiang CL (1994) Analysis on advancing progress and mechanical conditions of coal and gas outburst front. J China Univ Min Technol 23(4):1–9

  16. Kang HP, Wang JH, Gao FQ (2009) Stress distribution characteristics in rock surrounding heading face and its relationship with supporting. J China Coal Soc 34(12):1585–1593

  17. Kulakov VN (1995) Stress state in the face region of a steep coal bed. J Min Sci 31(3):161–168

  18. Kuznetsov SV, Trofimov VA (2003) Original stress state of coal seams. J Min Sci 39(2):107–111

  19. Lama RD, Bodziony J (1998) Management of outburst in underground coal mines. Int J Coal Geol 35(97):83–115

  20. Litwiniszyn J (1985) A model for the initiation of coal-gas outbursts. Int J Rock Mech Min Sci Geomech Abstr 22(1):39–46

  21. Min KB, Rutqvist J, Tsang CF, Jing L (2004) Stress-dependent permeability of fractured rock masses: a numerical study. Int J Rock Mech Min Sci 41:1191–1210

  22. Nazimko VV, Peng SS, Lapteev AA, Alexandrov SN, Sazhnev VP (1997) Damage mechanics around a roadway due to incremental ground pressure. Int J Rock Mech Min Sci 34:222.e1–222.e14

  23. Paterson L (1986) A model for outbursts in coal. Technical note. Int J Rock Mech Min Sci Geomech Abstr 23(4):327–332

  24. Shu LY, Wang K, Qi QX et al (2017) Evolutionary characteristics and outburst danger assessment model of stress field in coal driving face. J Min Saf Eng 34(2):259–267

  25. Skoczylas N (2012) Laboratory study of the phenomenon of methane and coal outburst. Int J Rock Mech Min Sci 55(10):102–107

  26. Sobczyk J (2011) The influence of sorption processes on gas stresses leading to the coal and gas outburst in the laboratory conditions. Fuel 90(3):1018–1023

  27. Topolnicki J (1999) Evaluating the stress generated during rock and gas outbursts. Arch Min Sci 44(4):503–518

  28. Wold MB, Connell LD, Choi SK (2008) The role of spatial variability in coal seam parameters on gas outburst behaviour during coal mining. Int J Coal Geol 75(1):1–14

  29. Xiong RQ (1989) Discussion on the width of plastic zone in coal wall. J China Coal Soc 1:16–22

  30. Yang W, Lin BQ, Zhai C et al (2012) How in situ stresses and the driving cycle footage affect the gas outburst risk of driving coal mine roadway. Tunn Undergr Space Technol 31:139–148

  31. Yu BF (1985) Mechanism of coal and gas outburst. China Coal Industry Publishing House, Beijing

  32. Zhou AT, Wang K, Li L et al (2017) A roadway driving technique for preventing coal and gas outbursts in deep coal mines. Environ Earth Sci 76(6):236

Download references

Funding

This research is financially supported by the National Natural Science Foundation of China (51274206, 51404277, 51874312, U1910206) and the Open fund of State Key Laboratory of Deep Geomechanics and Underground Engineering. This support is greatly acknowledged and appreciated.

Author information

Correspondence to Qifei Wang or Chengwu Li.

Ethics declarations

Conflict of interests

The authors declare that there is no conflict of interest.

Additional information

Both Qifei Wang and Chengwu Li have made great contribution to this manuscript

Responsible Editor: Murat Karakus

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Wang, Q., Zhao, Y., Wang, Y. et al. Model of stress distribution during coal roadway excavation and its numerical validation. Arab J Geosci 13, 187 (2020). https://doi.org/10.1007/s12517-020-5172-8

Download citation

Keywords

  • Stress state model
  • Coal and gas outburst
  • Driving face
  • Stress concentration factor