Advertisement

Applied Geophysics

, Volume 14, Issue 2, pp 216–224 | Cite as

Research of the electrical anisotropic characteristics of water-conducting fractured zones in coal seams

  • Ben-Yu Su
  • Jian-Hua Yue
Article

Abstract

Water flooding disasters are one of the five natural coal-mining disasters that threaten the lives of coal miners. The main causes of this flooding are water-conducting fractured zones within coal seams. However, when resistivity methods are used to detect water-conducting fractured zones in coal seams, incorrect conclusions can be drawn because of electrical anisotropy within the water-conducting fractured zones. We present, in this paper, a new geo–electrical model based on the geology of water-conducting fractured zones in coal seams. Factors that influence electrical anisotropy were analyzed, including formation water resistivity, porosity, fracture density, and fracture surface roughness, pressure, and dip angle. Numerical simulation was used to evaluate the proposed electrical method. The results demonstrate a closed relationship between the shape of apparent resistivity and the strike and dip of a fracture. Hence, the findings of this paper provide a practical resistivity method for coal-mining production.

Keywords

water-conducting fractured zones in coal seams coalfield goaf electrical anisotropy surface roughness formation water resistivity formation pressure 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Brace, W. F., and Orange A. F., 1968, Electrical resistivity changes in saturation rocks during fracture and frictional sliding: J. Geophysics. Res., 73 1433–1445.Google Scholar
  2. Brown, S. R., 1995, Simple mathematical model of a rough fracture: Journal of Geophysical Research, 100(B4), 5941–5952.Google Scholar
  3. Cheng, J. L., Li, F., Peng, S. P., et al., 2015, Joint inversion of TEM and DC in roadway advanced detection based on particle swarm optimization.: Journal of Applied Geophysics, 123 30–35.Google Scholar
  4. Chang, J. H., Yu, J. C., and Liu, Z. X., 2016, Threedimensional numerical modeling of full-space transient electromagnetic responses of water in goaf: Applied Geophysics, 13(3), 539–552.Google Scholar
  5. Dong, N. G., Pan, L. Y., and Li, J. B., 2011, Talk about of control measures of major hazard sources: Shandong Coal Science and Technology, 1 200–201.Google Scholar
  6. Keller, G. V., and Frischknecht, F. C., 1900, Electrical methods in geophysical prospecting: Pergamon Press, 190066.Google Scholar
  7. Li, D. C., Ge, B. T., and Hu, J. W., 1999, Predictedmechanism and experiment of resistivity method for the coal mine: Coal Geology and Exploration, 27(6), 62–64.Google Scholar
  8. Li, J. M., 2005, Geoelectric field and exploration of electrical method: The Geological Publishing House, Beijing.Google Scholar
  9. Liu, S. D., Wu, R. X., Zhang, P. S., and Cao, Y., 2009, Three dimension parallel electric surveying and iIts applications in water disaster exploration in coal mines: Journal of China Coal society, 34(7), 927–932.Google Scholar
  10. Liu, T. M. and Qin, H. l., 2006, Economic analysis of safety accidents in China coal mining: Coal Mine Safety, Total (377), 70–72.Google Scholar
  11. Power, W. L., Tullis T. E., et al., 1987, Roughness of natural faults surface: Geophysics Research Letter, 14 29–32.Google Scholar
  12. Sui W. H., et al., 2015, Interactions of overburden failure zones due to multiple-seam mining using longwall caving: Bulletin of Engineering Geology and the Environment, 74(3), 1019–1035.Google Scholar
  13. Said, A. H., 1994, Electric study of fracture anisotropy at Falkenberg: Geophysics, 59(6), 881–888.Google Scholar
  14. Shen, J. S., et al., 2010, Analysis of the mechanism of the effects of secondary porosities on the cementation factor and saturation index in reservoir formation with vuggs and fractures: Well Logging Technology, 34(1), 9–15.Google Scholar
  15. Shen, J. S., et al., 2009, Study on the anisotropic characteristics of the electric response to fractures reservoir: Chinese Journal of Geophysics, 52(11), 2903–2912.Google Scholar
  16. Stesky, R. M., 1986, Electrical conductivity of brine saturated fractured rock: Geophysics, 51(8), 1585–1593.Google Scholar
  17. Yue, J. H., and Li, Z. D., 1997, Mine DC Electrical Methods and Application to Coal Floor Water Invasion Detecting: Journal of China University of Mining and Technology, 26(1), 94–98.Google Scholar
  18. Yin, C., and Hodges, G., 2003, Identification of Electrical Anisotropy from Helicopter EM Data. Symposium on the Application of Geophysics to Engineering and Environmental Problems, 419–431.Google Scholar
  19. Yan, S., Xue, G. Q., Qiu, W. Z., et al., 2016, Feasibility of central loop TEM method for prospecting multilayer water-filled goaf. Applied Geophysics, 13(4), 587–597.Google Scholar
  20. Yin, C., and Weidelt, P., 1999, Geoelectrical fields in a layered earth with arbitrary anisotropy: Geophysics, 64(2), 426–434.Google Scholar
  21. Zhao, G. M., Li, T. L., Xu, K. J., and Li, J. P., 2007, The study and application of well-surface resistivity method in the safety at coal field: Progress in Geophysics, 22(6), 1895–1899.Google Scholar

Copyright information

© Editorial Office of Applied Geophysics and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.Institute of applied geophysics, The school resource and geosciencesCUMTXuzhouChina

Personalised recommendations