DOI QR코드

DOI QR Code

Rock burst criteria of deep residual coal pillars in an underground coal mine: a case study

  • Qiu, Pengqi (State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology) ;
  • Wang, Jun (State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology) ;
  • Ning, Jianguo (State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology) ;
  • Liu, Xuesheng (State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology) ;
  • Hu, Shanchao (State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology) ;
  • Gu, Qingheng (State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology)
  • 투고 : 2019.03.29
  • 심사 : 2019.11.17
  • 발행 : 2019.12.30

초록

The reliability of reinforced concrete structures is frequently compromised by the deterioration caused by reinforcement corrosion. Evaluating the effect caused by reinforcement corrosion on structural behaviour of corrosion damaged concrete structures is essential for effective and reliable infrastructure management. In lifecycle management of corrosion affected reinforced concrete structures, it is difficult to correctly assess the lifecycle performance due to the uncertainties associated with structural resistance deterioration. This paper presents a stochastic deterioration modelling approach to evaluate the performance deterioration of corroded concrete structures during their service life. The flexural strength deterioration is analytically predicted on the basis of bond strength evolution caused by reinforcement corrosion, which is examined by the experimental and field data available. An assessment criterion is defined to evaluate the flexural strength deterioration for the time-dependent reliability analysis. The results from the worked examples show that the proposed approach is capable of evaluating the structural reliability of corrosion damaged concrete structures.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China, Shandong Province Natural Science Foundation

The research described in this paper was financially supported by National Key R&D Program of China (No. 2018YFC0604703); National Natural Science Foundation of China (No. 51574154, 51804181); Major Program of Shandong Province Natural Science Foundation (no. ZR2018ZA0603); Key R & D programs of Shandong Province (no. 2018GSF116003); Shandong Province Natural Science Fund (no. ZR2018QEE002, ZR2017BEE013). SDUST Graduate Student Technology Innovation Project (No. SDKDYC190116) The authors express sincere thanks to the reviewers for their helpful comments and suggestions for improving this paper.

참고문헌

  1. Brady, B.H.G. and Brown, E.B. (2006), Rock Mechanics for Underground Mining, Springer, The Netherlands.
  2. Cai, M.F. (2016), "Prediction and prevention of rock burst in metal mines-a case study of Sanshandao gold mine", J. Rock Mech. Geotech. Eng., 8(2), 204-211. https://doi.org/10.1016/j.jrmge.2015.11.002.
  3. Castro, L.A.M., Bewick, R.P. and Carter, T.G. (2012), An Overview of Numerical Modelling Applied to Deep Mining, in Innovative Numerical Modelling in Geomechanics, CRC Press, London, U.K., 393-414.
  4. Chen, W.Z., Lu, S.P. and Guo, X.H. (2009), "Research on unloading confining pressure tests and rockburst criterion based on energy theory", Chin. J. Rock Mech. Eng., 28(8), 1530-1540. https://doi.org/10.3321/j.issn:1000-6915.2009.08.003
  5. Cook, N.G.W. (1965), "The failure of rock", Int. J. Rock Mech. Min. Sci. Geomech. Abstr., 2, 389-403. https://doi.org/10.1016/0148-9062(65)90004-5.
  6. Fan, D.Y., Liu, X.S., Tan, Y.L, Yan, L. Song, S.L. and Ning, J.G. (2019), "An innovative approach for gob-side entry retaining in deep coal mines: A case study", Energy Sci. Eng., 1-15. https://doi.org/10.1002/ese3.431.
  7. GB/T 25217.2-2010 (2010), "Classification and laboratory test method on bursting liability", Coal Standards Press of China, Beijing, China.
  8. Hoek, E. and Marinos, P.G. (2010), "Tunnelling in overstressed rocks. Rock engineering in difficult ground conditions-soft rocks and karst", Proceedings of the Regional Symposium of the International Society for Rock Mechanics, EUROCK 2009, Dubrovnik, Croatia, October.
  9. Hu, S.C., Tan, Y.L., Zhou, H., Ru, W.K., Ning, J.G., Wang, J., Huang, D.M. and Li, Z. (2019), "Anisotropic modeling of layered rocks incorporating planes of weakness and volumetric stress", Energy Sci. Eng., https://doi.org/10.1002/ese3.551.
  10. Li, W.F., Bai, J.B., Syd, P., Wang, X.Y. and Xu Y. (2015), "Numerical modeling for yield pillar design: A case study", Rock Mech. Rock Eng., 48(1), 305-318. https://doi.org/10.1007/s00603-013-0539-8.
  11. Li, Z., Zhou, H., Jiang, Y., Hu, D.W. and Zhang, C.Q. (2018), "Methodology for establishing comprehensive stress paths in rocks during hollow cylinder testing", Rock Mech. Rock Eng., 52(4), 1055-1074. https://doi.org/10.1007/s00603-018-1628-5.
  12. Liu, W.T., Zhao, J.Y., Nie, R., Zeng, Y., Xu, B. and Sun, X. (2019), "A full coupled thermal-hydraulic-chemical model for heterogeneity rock damage and its application in predicting water inrush", Appl. Sci., 9, 2195. https://doi.org/10.3390/app9112195.
  13. Liu, X.S., Gu, Q.H., Tan, Y.L., Ning, J.G. and Jia, Z.C. (2019), "Mechanical characteristics and failure prediction of cement mortar with a sandwich structure", Minerals, 9(3), 143. https://doi.org/10.3390/min9030143.
  14. Liu, X.S., Tan, Y.L., Ning, J.G., Lu, Y. and Gu, Q.H. (2018), "Mechanical properties and damage constitutive model of coal in coal-rock combined body", Int. J. Rock Mech. Min. Sci., 110, 140-150. https://doi.org/10.1016/j.ijrmms.2018.07.020.
  15. Mazaira, A. and Konicek, P. (2015), "Intense rock burst impacts in deep underground construction and their prevention", Can. Geotech. J., 52(10), 1426-1439. https://doi.org/10.1139/cgj-2014-0359.
  16. Miao, S.J., Cai, M.F., Guo, Q.F. and Huang, Z.J. (2016), "Rock burst prediction based on in-situ stress and energy accumulation theory", Int. J. Rock Mech. Min. Sci., 83, 86-94. http://dx.doi.org/10.1016%2Fj.ijrmms.2016.01.001. https://doi.org/10.1016/j.ijrmms.2016.01.001
  17. Mitri, H.S. (1999), "FE modelling of mining-induced energy release and storage rates", J. S. Afr. Inst. Min. Metall., 99(2), 103-110.
  18. Naji, A.M., Emad, M.Z., Rehman, H. and Yoo, H. (2019), "Geological and geomechanical heterogeneity in deep hydropower tunnels: A rock burst failure case study", Tunn. Undergr. Sp. Technol., 84, 507-521. https://doi.org/10.1016/j.tust.2018.11.009.
  19. Ning, J.G., Liu, X.S., Tan, J., Gu, Q.H., Tan, Y.L. and Wang, J. (2018a), "Control mechanisms and design for a 'col-backfillgangue' support system for coal mine gob-side entry retaining", Int. J. Oil Gas Coal Technol., 18(3-4), 444-465. https://doi.org/10.1504/ijogct.2018.10014371
  20. Ning, J.G., Wang, J., Jiang, J.Q., Hu, S.C., Jiang, L.S. and Liu, X.S. (2018b), "Estimation of crack initiation and propagation thresholds of confined brittle coal specimens based on energy dissipation theory", Rock Mech. Rock Eng., 51, 119-134. https://doi.org/10.1007/s00603-017-1317-9.
  21. Shang, H.F., Ning, J.G., Hu, S.C., Yang, S. and Qiu, P.Q. (2019), "Field and numerical investigations of gateroad system failure under an irregular residual coal pillar in close-distance coal seams", Energy Sci. Eng., 1-21. https://doi.org/10.1002/ese3.455.
  22. Wang, J., Ning, J.G., Jiang, L.S., Jiang, J.Q. and Bu, T.T. (2018a), "Structural characteristics of strata overlying of a fully mechanized longwall face: a case study", J. S. Afr. Inst. Min. Metall., 118, 1195-1204. http://dx.doi.org/10.17159/2411-9717/2018/v118n11a10.
  23. Wang, J., Ning, J.G., Qiu, P.Q., Yang, S. and Shang, H.F. (2018b), "Microseismic monitoring and its precursory parameter of hard roof collapse in longwall faces: A case study", Geomech. Eng., 17(4), 375-383. https://doi.org/10.12989/gae.2019.17.4.000.
  24. Yang, S., Wang, J., Li, X.H., Ning, J.G. and Qiu, P.Q. (2019), "In situ investigations into mining-induced hard main roof fracture in longwall mining: A case study", Eng. Fail. Anal., 106, 104188. https://doi.org/10.1016/j.engfailanal.2019.104188.
  25. Zhao, T.B., Guo, W.Y., Tan, Y.L., Lu, C.P. and Wang, C.W. (2018), "Case histories of rock bursts under complicated geological conditions", Bull. Eng. Geol. Environ., 77, 1529-1545. https://doi.org/10.1007/s10064-017-1014-7.
  26. Zhu, S.T., Feng, Y., Jiang, F.X. and Liu, J.H. (2018), "Mechanism and risk assessment of overall-instability-induced rockbursts in deep island longwall panels", Int. J. Rock Mech. Min. Sci., 106, 342-349. https://doi.org/10.1016/j.ijrmms.2018.04.031.