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Guided wave formation in coal mines and associated effects to buildings

  • Uyar, Guzin G. (Department of Mining Engineering, Hacettepe University, Faculty of Engineering) ;
  • Babayigit, Ezel (General Directorate of Turkish Coal Company)
  • Received : 2016.04.04
  • Accepted : 2016.08.09
  • Published : 2016.12.25

Abstract

The common prospect in diminishing mine-blast vibration is decreasing vibration with increasing distance. This paper indicates that, contrary to the general expectancy, vibration waves change their forms when they are travelling through the low velocity layer like coal and so-called guided waves moving the vibration waves to longer distances without decreasing their amplitudes. The reason for this unexpected vibration increase is the formation of guided waves in the coal bed which has low density and low seismic velocity with respect to the neighboring layers. The amplitudes of these guided waves, that are capable of traveling long distances depending on the seam thickness, are several times higher than that of the usual vibration waves. This phenomenon can many complaints from the residential areas very far away from the blasting sites. Thus, this unexpected behavior of the coal beds in the surface coal mines should also be considered in vibration minimization studies. This study developed a model to predict the effects of guided waves on the propagation ways of blast-induced vibrations. Therefore, vibration mitigation studies considering the nearby buildings can be focused on these target places.

Keywords

Acknowledgement

Supported by : Turkish Coal Enterprises

References

  1. Aksoy, C.O. (2008), "Review of rock mass rating classification: historical developments, applications and restrictions", J. Min. Sci., 44, 51-63. https://doi.org/10.1007/s10913-008-0005-2
  2. Aksoy, C.O., Kose, H., Onargan, T., Koca, Y. and Heasley, K (2004), "Estimation of limit angle using laminated displacement discontinuity analysis in the Soma coal field, Western Turkey", Int. J. Rock Mech. Min. Sci., 41(4), 547-556. https://doi.org/10.1016/j.ijrmms.2003.01.002
  3. Aksoy, C.O., Ozacar, V. and Kantarci, O. (2010), "An example for estimation of rock mass deformations around an underground opening by numerical modeling", Int. J. Rock Mech. Min. Sci., 47, 272-278. https://doi.org/10.1016/j.ijrmms.2009.12.001
  4. Babayigit, E. (2012), "Investigation of blast-induced in-seam channel waves and their environmental impacts", MSc. Thesis, Ankara University Department of Geophysics, Turkey.
  5. Buchanan, D.J., Davis, R., Jackson, P.J. and Taylor, P.M. (1981), "Fault location by channel wave seismology in United Kingdom coal seams", Geophys., 46(7), 994-1002. https://doi.org/10.1190/1.1441248
  6. Constantopoulos, I.V., Wessem, V.Y. and Verbrugge, J.C. (2012), "Vertical response spectra for an impact on ground surface", Eartq. Struct., 3(3-4), 435-455. https://doi.org/10.12989/eas.2012.3.3_4.435
  7. Dobroka, M. (2001), "The investigation of laterally varying geological structures by means of guided wave inversion technique", Geoscie., 59(1), 5-22.
  8. Essen, K., Bohlen, T., Friederich, W. and Meier, T. (2007), "Modelling of rayleigh-type seam waves in disturbed coal seams and around a coal mine roadway", Geophys. J. Int., 170(1), 511-526. https://doi.org/10.1111/j.1365-246X.2007.03436.x
  9. Essen, K., Misiek, R. and Friederich, W. (2005), "Seismic reconnaissance beyond the faces of an advancing coal mine roadway", 11th European meeting of environmental and engineering geophysics, EAGE, Palermo, Italy.
  10. Ewing, C.M., Guillin, C., Dhakal, R.P. and Chase, J.G. (2009), "Spectral analysis of semi-actively controlled structures subjected to blast loading", Struct. Eng. Mech., 33(1), 1-14. https://doi.org/10.12989/sem.2009.33.1.001
  11. Findlay, M.J., Goulty, N.R. and Kragh, J.E. (1991), "The crosshole seismic reflection method in opencast coal exploration", First 1 Break, 9(11), 509-514.
  12. Fohrmann, M., Igel, H., Jahnke, G. and Ben-Zion, Y. (2004), "Guided waves from sources outside ffaults: an indication for shallow fault zone structure", Pure Appl. Geophys, 161(1), 2125-2137.
  13. Greenhalgh, S.A., Cao, S., Mason, I.M. and Pant, D.R. (1992), "Fault proximity surveys in coal using guided seismic waves numerical modelling", Pageoph, 139(2), 215-239. https://doi.org/10.1007/BF00876328
  14. Grillo, R. (2003), "Subsurface void detection using seismic tomographic imaging", Lawrence Berkeley National Laboratory: Lawrence Berkeley National Laboratory. Retrieved from: http://escholarship.org/uc/ite/10b3g07v
  15. Haberland, C., Agnon, A., El-Kelani, R., Maercklin, N., Qabbani, I., Rumpker, G., Ryberg, T., Scherbaum, F. and Weber, M. (2003), "Modeling of seismic guided waves at the Dead Sea transform", J. Geophys. Res., 108(B7), 2342-2355.
  16. Krey, T.C. (1963), "Channel waves as a tool of applied geophysics in coal mining", Geophys., 28(5), 701-714. https://doi.org/10.1190/1.1439258
  17. Lavergne, M. (1989), Seismic Methods, TECHNIP, Paris.
  18. Liu, E., Queen, J.H. and Cox, V.D. (2000), "Anisotropy and attenuation of crosshole channel waves from the Antrim Shale gas play, Michigan Basin", J. Appl. Geophys., 44(1), 47-61. https://doi.org/10.1016/S0926-9851(99)00069-5
  19. Mahmoud, S. (2014), "Blast load induced response and the associated damage of buildings considering SSI", Earthq. Struct., 7 (3), 231-252.
  20. Oncu, M.E., Yon, B., Akkoyun, O. and Taskiran, T. (2015), "Investigation of blast-induced ground vibration effects on rural buildings", Struct. Eng. Mech., 54(3), 545-560. https://doi.org/10.12989/sem.2015.54.3.545
  21. Ravindra, R. and Cerveny, V. (1971), Theory of seismic head waves, Univ. of Toronto Press.
  22. Sheriff, R. and Geldart, L.P. (1982), Exploration seismology, Cambridge Univ. Press.
  23. Wang, H. (2005), "Two-dimensional FEM modeling of seismic wave propagation in coal seam", EGEE 520 Fall 2005 Semester Paper.
  24. Yancey, D.J. (2006), "Analysis and application of coal seam seismic waves for detection of abandoned mines", Master Thesis, Faculty of the Virginia Polytechnic Institute and State University.
  25. Yang, Z., Ge, M. and Wang, S. (2009), "Characteristics of transmitting channel wave in a coal seam", Min. Sci. Tech. (China), 19(3), 331-336. https://doi.org/10.1016/S1674-5264(09)60062-4
  26. Yigitel, I. (1981), "Mugla-Milas komurlu neojeni Husamlar sektoru jeoloji raporu", MTA Raporu, Ankara.
  27. Zhang, Y.H., Lin, J.H., Willams, F.W. and Li, Q.S. (2006), "Wave passage effect of seismic ground motions on the response of multiply supported structures", Struct. Eng. Mech., 20(6), 655-672. https://doi.org/10.12989/sem.2005.20.6.655

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