Stability Evaluation Method for Gateways in Closely Spaced Coal Seams and Surrounding Rock Control Technology

Research Article - Civil Engineering
  • 12 Downloads

Abstract

A stability evaluation model, with an assessment system comprising 14 main indexes, is established by applying fuzzy mathematics and euthenics. The indexes are roughly quantized by the fuzzy membership degree. Analytic hierarchy process is utilized to assign the weight of each index. The stability level of a gateway in a mine with closely spaced coal seams is calculated by comprehensive correlation analysis based on the euthenics theory. As an index representing the gateway stability, the stability level can indicate the effect the adjustment of the gateway parameters will have on gateway stability and point out the areas to be improved for optimal control of the surrounding rock. In a case study, the optimization technology was applied to gateways in the Xiandewang coalmine, China, whereby the stability of headgate no. 1720 and tailgates no. 1925 and no. 1727 was enhanced by applying the stability-level evaluation analysis. Through the engineering application developed here, utilizing indexes characterizing the improvement in gateway stability levels changes to the stress disturbance and adjustment of the construction factors can effectively improve the gateway support when the natural attributes are similar or unchanged.

Keywords

Gateway stability Evaluation model Closely spaced coal seams Surround rock control technology 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Yan, H.; Weng, M.Y.; Feng, R.M.; Li, W.K.: Layout and support design of a coal road way in ultra-close multiple-seams. J. Cent. South Univ. 22, 4385–4395 (2015)CrossRefGoogle Scholar
  2. 2.
    Tan, Y.L.; Zhao, T.B.; Xiao, Y.X.: In situ investigations of failure zone of floor strata in mining closely-spaced coal seams. Int. J. Rock Mech. Min. Sci. 47, 865–870 (2010)CrossRefGoogle Scholar
  3. 3.
    Zhang, F.; Liu, D.F.; Zhang, X.B.; Li, X.M.; Huang, K.: Engineering geology analysis of plastic zone distribution of gateway in inhomogeneous geo-stress field. Coal Min. Technol. 05, 56–59 (2013)Google Scholar
  4. 4.
    Wang, L.G.; Lu, Y.L.; Sun, X.K.: Intelligent expert system for designing bolt-grouting support of soft-rock gateways and its applications. J. Min. Saf. Eng. 01, 1–6 (2016)Google Scholar
  5. 5.
    Wang, P.F.; Zhao, J.L.; Wang, Z.Q.; Sun, Z.W.; Xu, C.H.; Song, Z.Y.; Su, Y.: Mechanism of gob–pillar interaction for subcritical panels and its application. Chin. J. Rock Mech. Eng. 05, 1185–1200 (2017)Google Scholar
  6. 6.
    Wang, X.B.; Wu, X.L.; Pan, Y.S.: An equivalent continuum model for exfoliation or slabbing phenomenon of surrounding rock of circular gateway and effects of lateral pressure coefficients. Rock Soil Mech. 08, 2395–2402 (2012)Google Scholar
  7. 7.
    Wu, H.; Fang, Q.; Zhang, Y.D.; Xiang, H.B.; Gong, Z.M.: Analytical model and stability of surrounding block rock mass around deep gateways. Chin. J. Geot. Eng. 31, 1229–1235 (2009)Google Scholar
  8. 8.
    Ji, M.; Guo, H.J.; Zhang, Y.D.; Cheng, L.; Ji, Y.L.: Vulnerability analysis of soft caving gateway support system and surrounding rock optimal control technology research. Math. Probl. Eng. 2014, 369–372 (2014)Google Scholar
  9. 9.
    Wang, J.Y.; Song, P.Z.; Wang, Z.; Zhang, B.; Liu, W.; Yu, J.: A combined model for regional eco-environmental quality evaluation based on particle swarm optimization-radial basis function network. Arab. J. Sci. Eng. 41, 1483–1493 (2003)MathSciNetCrossRefGoogle Scholar
  10. 10.
    Qian, M.G.; Shi, P.W.; Zou, X.Z.: Mining Pressure and Stara Control. China University of Mining and Technology Press, Xuzhou (2003)Google Scholar
  11. 11.
    Wang, C.; Tu, S.H.; Chen, M.; Yuan, Y.: Optimal selection of a longwall mining method for a thin coal seam working face. Arab. J. Sci. Eng. 41, 3771–3781 (2016)CrossRefGoogle Scholar
  12. 12.
    Wen, X.L.: Business enterprise performance appraisal based on the method of fuzzy appraised. J. Wuhan Univ. Technol. 28, 146–149 (2006)Google Scholar
  13. 13.
    Gao, C.B.; Chen, X.G.; Wei, C.H.; Peng, X.C.: Application of entropy weight and fuzzy synthetic evaluation in urban ecological security assessment. Chin. J. Appl. Ecol. 17, 1923–1927 (2006)Google Scholar
  14. 14.
    Ruan, H.; Zhang, Y.H.; Zhu, Z.Q.; Wang, J.: An improved fuzzy method for evaluating stability of highway slopes. Rock Soil Mech. 36, 3337–3344 (2015)Google Scholar
  15. 15.
    Cai, W.: Matter Element Model and Its Application. Science and Technology Literature Press, Beijing (1994)Google Scholar
  16. 16.
    Cai, W.: Extension management engineering and applications. Int. J. Oper. Quant. Manage. 1, 59–72 (1999)Google Scholar
  17. 17.
    Xie, Q.M.; Xia, Y.Y.: Extension classification prediction method for the stability of rock-mass slopes. Chin. J. Rock Mech. Eng. 03, 438–441 (2003)Google Scholar
  18. 18.
    Zhang, R.G.; Qian, J.Z.; Ma, L.: Application of extension identification method in mine water-bursting source discrimination. J. China Coal Soc. 01, 33–38 (2009)Google Scholar
  19. 19.
    Li, D.Y.; Li, H.M.; Zhou, Y.: Study on the evaluation method of scientized mining by extension theory. J. Min. Saf. Eng. 01, 57–62 (2013)CrossRefGoogle Scholar
  20. 20.
    Xue, F.C.: Dynamic responses of subway gateway in clay stratum to moving loads. Arab. J. Sci. Eng. 42, 1327–1340 (2017)CrossRefGoogle Scholar
  21. 21.
    Jiang, J.Q.; Han, J.S.; Shi, Y.K.: Structure Stability of Gateways Surrounding Rock and Its Controlling Design. China Coal Industry Publishing House, Beijing (1998)Google Scholar
  22. 22.
    Mahmoud, M.A.A.N.: Improving behavior of gateway lining constructed in layered soil including soft clay layer using stone columns. Arab. J. Sci. Eng. 38, 3289–3300 (2013)CrossRefGoogle Scholar
  23. 23.
    Yang, J.X.; Liu, C.Y.; Yu, B.; Wu, F.F.: Calculation and analysis of stress in strata under gob pillars. J. Cent. South Univ. 22, 1026–1036 (2015)CrossRefGoogle Scholar
  24. 24.
    Zhang, Z.Q.; Xu, D.M.; Liu, Q.S.: The research on the methodology of weighted average evaluation for surrounding rock stability of tunnel. Rock Soil Mech. 30, 3464–3469 (2009)Google Scholar
  25. 25.
    Zhang, Z.Q.; Wei, J.S.: The research on the forecast of the influence of geological structures on surrounding rock stability. J. Taiyuan Univ. Technol. 40, 177–179 (2009)Google Scholar
  26. 26.
    Liu, J.H.; Jiang, F.X.; Wang, N.G.; Li, Z.S.; Zhang, Z.G.: Research on reasonable width of segment pillar of fully mechanized caving face in extra-thick coal seam of deep shaft. Chin. J. Rock Mech. Eng. 31, 921–927 (2012)Google Scholar
  27. 27.
    Wang, P.F.; Zhao, J.L.; Feng, G.R.; Wang, Z.Q.: Improving stress environment in development entries through an alternate longwall mining layout. Arab. J. Geosci. 11, 44 (2018)CrossRefGoogle Scholar
  28. 28.
    Zhang, G.C.; He, F.L.; Lai, Y.H.; Song, J.W.; Xiao, P.: Reasonable width and control technology of coal pillar in fully mechanized caving face section of high strength mining. J. China Coal Soc. 09, 2188–2194 (2016)Google Scholar
  29. 29.
    Zhao, Y.X.; Jiang, Y.D.; Zhang, K.X.; Wang, H.W.; Tian, S.P.: Analysis of gateway stability in underground coal mining based on disturbed state theory. J. China Univ. Min. Technol. 43, 233–240 (2014)Google Scholar
  30. 30.
    Kang, H.P.; Wang, J.H.: Rock Bolting Theory and Complete Technology for Coal Roadways. China Coal Industry Publishing House, Beijing (2007)Google Scholar
  31. 31.
    MT/T 1104-2009. Technical specifications for bolt supporting in coal roadway. China state administration of work safety (2009)Google Scholar

Copyright information

© King Fahd University of Petroleum & Minerals 2018

Authors and Affiliations

  1. 1.School of Mines, Key Laboratory of Deep Coal Resource MiningMinistry of Education of China, China University of Mining and TechnologyXuzhouChina
  2. 2.Key Laboratory of Deep Coal Resource MiningMinistry of Education, China University of Mining and TechnologyXuzhouChina

Personalised recommendations