Geomechanics and Engineering

  • 제24권3호
  • /
  • Pages.205-213
  • /
  • 2021
  • /
  • 2005-307X(pISSN)
  • /
  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Effects of water saturation time on energy dissipation and burst propensity of coal specimens

  • Yang, Xiaohan (School of Civil, Mining and Environmental Engineering, University of Wollongong) ;
  • Ren, Ting (School of Civil, Mining and Environmental Engineering, University of Wollongong) ;
  • Tan, Lihai (School of Civil, Mining and Environmental Engineering, University of Wollongong) ;
  • Remennikov, Alex (School of Civil, Mining and Environmental Engineering, University of Wollongong)
  • 투고 : 2020.05.05
  • 심사 : 2021.01.08
  • 발행 : 2021.02.10
⟨ 이전 논문 다음 논문 ⟩

초록

Water infusion has long been taken as an effective way to eliminate coal burst risk as coal properties can be loosen and soften by water infusion. However, not all industrial trials of water infusion for coal burst prevention have been necessarily effective in all situations as the effectiveness of this method can be affected by water infusion time, coal properties and the parameters of water injection. Hence, some fundamental issues including the effects of water infusion time on burst propensity and energy evolution need to be further discussed. In this paper, four groups of coal specimens with 0 day, 5 days, 10 days, and 15 days water saturation time are tested under uniaxial compression load with the application of AE monitoring. To comprehensively compare the burst behavior of coal specimens under different water saturation time, stress-strain curves, AE counts, fragmentation characteristics and burst propensity of these groups are analyzed. It was found by this research that sufficient water saturation can mitigate the burst behavior of coal samples while insufficient water infusion might cannot reach the burst mitigation aims.

키워드

과제정보

The authors sincerely acknowledge Mr. Duncan Best and Mr. Travis Marshall for their support during the experimental process. This research is funded by the State Key Laboratory of Coal Resources and safe Mining, CUMT (SKLCRSM19KF003).

참고문헌

  1. Aguado, M.B.D. and Nicieza, C.G. (2007), "Control and prevention of gas outbursts in coal mines, Riosa-Olloniego coalfield, Spain", Int. J. Coal Geol., 69(4), 253-266. https://doi.org/10.1016/j.coal.2006.05.004.
  2. Brauner, G. (1994), Rockbursts in Coal Mines and Their Control, DMT, Essen, Balkema, Germany.
  3. Dou, L.M. and He, X.Q. (2001), Theory and Technology of Rock Burst Prevention, China University of Mining and Technology Press, Xuzhou, China.
  4. Frid, V. (2000), "Electromagnetic radiation method water-infusion control in rockburst-prone strata", J. Appl. Geophys., 43(1), 5-13. https://doi.org/10.1016/S0926-9851(99)00029-4.
  5. Genis, M., Akcin, H., Aydan, O. and Bacak, G. (2018). "Investigation of possible causes of sinkhole incident at the Zonguldak Coal Basin, Turkey", Geomech. Eng., 16(2), 177-185. https://doi.org/10.12989/gae.2018.16.2.177.
  6. Gu, H., Tao, M., Wang, J., Jiang, H., Li, Q. and Wang, W. (2018), "Influence of water content on dynamic mechanical properties of coal", Geomech. Eng., 16(1), 85-95. https://doi.org/10.12989/gae.2018.16.1.085.
  7. Guo, W.Y., Tan, Y.L., Yang, Z.L., Zhao, T.B. and Hu, S.C. (2017), "Effect of saturation time on the coal burst liability indexes and its application for rock burst mitigation", Geotech. Geol. Eng., 36(1), 589-597. https://doi.org/10.1007/s10706-017-0300-2.
  8. Kidybinski, A. (1981), "Bursting liability indices of coal", Int. J. Rock Mech. Min. Sci. Geomech. Abstr., 18(4), 295-304. https://doi.org/10.1016/0148-9062(81)91194-3.
  9. Kim, E., Garcia, A. and Changani, H. (2018), "Fragmentation and energy absorption characteristics of Red, Berea and Buff sandstones based on different loading rates and water contents", Geomech. Eng., 14(2), 151-159. https://doi.org/10.12989/gae.2018.14.2.151.
  10. Konicek, P., Ptacek, J., Waclawik, P. and Kajzar, V. (2019), "Long-term Czech experiences with rockbursts with applicability to today's underground coal mines", Rock Mech. Rock Eng., 52(5), 1447-1458. https://doi.org/10.1007/s00603-018-1489-y.
  11. Lee, H.B., Oh, T.M., Park, E.S., Lee, J.W. and Kim, H.M. (2017), "Factors affecting waterproof efficiency of grouting in single rock fracture", Geomech. Eng., 12(5), 771-783. https://doi.org/10.12989/gae.2017.12.5.771.
  12. Liu, D., Li, D., Zhao, F. and Wang, C. (2014), "Fragmentation characteristics analysis of sandstone fragments based on impact rockburst test", J. Rock Mech. Geotech. Eng., 6(3), 251-256. https://doi.org/10.1016/j.jrmge.2014.04.001.
  13. Liu, F. and Li, L. (2020), "Study on the propagation mechanism of stress wave in underground mining", Comput. Concrete, 25(2), 145-154. https://doi.org/10.12989/cac.2020.25.2.145.
  14. Liu, X., Xu, G., Zhang, C., Kong, B., Qian, J., Zhu, D. and Wei, M. (2017), "Time effect of water injection on the mechanical properties of coal and its application in rockburst prevention in mining", Energies, 10(11), 1783. https://doi.org/10.3390/en10111783.
  15. Liu, X., Xu, G., Zhang, C., Kong, B., Qian, J., Zhu, D. and Wei, M. (2017), "Time effect of water injection on the mechanical properties of coal and its application in rockburst prevention in mining", Energies, 10(11), 1783. https://doi.org/10.3390/en10111783.
  16. Lou, Q., Song, D., He, X., Li, Z., Qiu, L., Wei, M. and He, S. (2019), "Correlations between acoustic and electromagnetic emissions and stress drop induced by burst-prone coal and rock fracture", Safety Sci., 115, 310-319. https://doi.org/10.1016/j.ssci.2019.02.022.
  17. Mark, C. (2017), "Coal bursts that occur during development: A rock mechanics enigma", Int. J. Min. Sci. Technol., 28(1), 35-42. https://doi.org/10.1016/j.ijmst.2017.11.014.
  18. Maruvanchery, V. and Kim, E. (2019), "Effects of water on rock fracture properties: Studies of mode I fracture toughness, crack propagation velocity, and consumed energy in calcite-cemented sandstone", Geomech. Eng., 17(1), 57-67. https://doi.org/10.12989/gae.2019.17.1.057.
  19. Meng, Z.P., Pan, J.N., Liu, L.L., Meng, G.X. and Zhao, Z.H. (2009), "Influence of moisture contents on mechanical properties of sedimentary rock and its bursting potential", Chin. J. Rock Mech. Eng., 28(s1), 2637-2643.
  20. Moayedifar, A., Nejati, H.R., Goshtasbi, K. and Khosrotash, M. (2019), "Seismic fragility and risk assessment of an unsupported tunnel using incremental dynamic analysis (IDA)", Earthq. Struct., 16(6), 705-714. https://doi.org/10.12989/eas.2019.16.6.705.
  21. National Coal Mine Safety Administration (2018), Rules for Prevention and Controlling of Coal Burst in Mines, National Coal Mine Safety Administration. Beijing, China.
  22. Ning, J., Wang, J., Tan, Y., Zhang, L. and Bu, T. (2017), "In situ investigations into mining-induced overburden failures in close multiple-seam longwall mining: A case study", Geomech. Eng., 12(4), 657-673. https://doi.org/10.12989/gae.2017.12.4.657.
  23. Peng, R., Ju, Y., Wang, J.G., Xie, H., Gao, F. and Mao, L. (2015), "Energy dissipation and release during coal failure under conventional triaxial compression", Rock Mech. Rock Eng., 48(2), 509-526. https://doi.org/10.1007/s00603-014-0602-0.
  24. Perera, M.S.A., Ranjith, P.G. and Peter, M. (2011), "Effects of saturation medium and pressure on strength parameters of Latrobe Valley brown coal: Carbon dioxide, water and nitrogen saturations", Energy, 36(12), 6941-6947. https://doi.org/10.1016/j.energy.2011.09.026.
  25. Pimienta, L., Fortin, J. and Gueguen, Y. (2014), "Investigation of elastic weakening in limestone and sandstone samples from moisture adsorption", Geophys. J. Int., 199(1), 335-347. https://doi.org/10.1093/gji/ggu257
  26. Qi, Q.X., Peng, Y.W., Li, H.Y., Li, J.Q., Wang, Y.G. and Li, C.R. (2011), "Study of bursting liability of coal and rock", Chin. J. Rock Mech. Eng., 30(s1), 2736-2742.
  27. Ranjith, P.G., Jasinge, D., Choi, S.K., Mehic, M. and Shannon, B. (2010), "The effect of CO2 saturation on mechanical properties of Australian black coal using acoustic emission", Fuel, 89(8), 2110-2117. https://doi.org/10.1016/j.fuel.2010.03.025.
  28. Ren, T.X., Plush, B. and Aziz, N. (2011), "Dust controls and monitoring practices on Australian longwalls", Procedia Eng., 26, 1417-1429. https://doi.org/10.1016/j.proeng.2011.11.2319.
  29. Shen, B.T. and Barton, N. (2018), "Rock fracturing mechanisms around underground openings", Geomech. Eng., 16(1), 35-47. https://doi.org/10.12989/gae.2018.16.1.035.
  30. Shen, B.T. and Luo, X. (2016), "Review of Chinese coal burst experience and analysis of microseimic data from Australian mines", CSIRO Energy, CSIRO, Australia.
  31. Varley, F. and Whyatt, J. (2008), "Work practices to manage bump prone ground", Proceedings of the 27th International Conference on Ground Control in Mining, Morgantown, West Virginia, U.S.A., July.
  32. Wang, Z.S., Li, Y., Zhu, W.S., Xue, Y.G., Jiang, B. and Sun, Y.B. (2017), "Field monitoring of splitting failure for surrounding rock masses and applications of energy dissipation model", Geomech. Eng., 12(5), 595-609. https://doi.org/10.12989/gae.2017.12.4.595.
  33. Yang, X., Ren, T. and He, X. (2020), "Experimental study of coal burst risk prediction using fractal dimension analysis of AE spatial distribution", J. Appl. Geophys., 104025. https://doi.org/10.1016/j.jappgeo.2020.104025.
  34. Yang, X., Ren, T. and Tan, L. (2020), "Estimation of average ejection velocity generated by rib burst under compression load", Int. J. Rock Mech. Min. Sci., 128, 104277. https://doi.org/10.1016/j.ijrmms.2020.104277.
  35. Yang, X., Ren, T. and Tan, L. (2020), "Size distribution measurement of coal fragments using digital imaging processing", Measurement, 107867. https://doi.org/10.1016/j.measurement.2020.107867.
  36. Yang, X., Ren, T., Tan, L., Remennikov, A. and He, X. (2018), "Developing coal burst propensity index method for Australian coal mines", Int. J. Min. Sci. Technol., 28(5), 783-790. https://doi.org/10.1016/j.ijmst.2018.08.008.
  37. Zhang, C., Canbulat, I., Hebblewhite, B. and Ward, C.R. (2017), "Assessing coal burst phenomena in mining and insights into directions for future research", Int. J. Coal Geol., 179, 28-44. https://doi.org/10.1016/j.coal.2017.05.011.
  38. Zhang, S., Li, Y. and Xu, C. (2017), "Application of black box model for height prediction of the fractured zone in coal mining", Geomech. Eng., 13(6), 997-1010. https://doi.org/10.12989/gae.2017.13.6.997.
  39. Zhang, W.B., Wang, S.K., Wu, Y.K. and Qu, X.C. (1986), "To determine proneness of coal burst by dynamic failure time", Coal Sci. Technol., 14(3), 31-34.
  40. Zhou, Z., Cai, X., Cao, W., Li, X., and Xiong, C. (2016), "Influence of water content on mechanical properties of rock in both saturation and drying processes", Rock Mech. Rock Eng., 49(8), 3009-3025. https://doi.org/10.1007/s00603-016-0987-z.