1887
  1. Home
  2. A-Z Publications
  3. Geophysical Prospecting
  4. Volume 36, Issue 3
  5. Article
Volume 36 Number 3
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

The WKB‐method is used for the derivation of both the complex dispersion relation and displacement functions for Love channel‐waves that propagate in a coal seam of varying thickness. The constant ‐model is used to describe the anelastic friction. With numerical solutions of the absorption‐dispersion relation, the influence of thickness changes on the phase velocity and absorption coefficient of Love seam‐waves is analysed at various frequencies. It is shown that the changes in the seam thickness can be optimally detected around the average Airy‐phase frequency. An equivalence is pointed out between the wave guide structures: homogeneous with varying seam thickness and horizontally inhomogeneous with constant seam thickness.

Loading

Article metrics loading...

/content/journals/10.1111/j.1365-2478.1988.tb02166.x
2006-04-27
2024-04-26

  • From This Site

    /content/journals/10.1111/j.1365-2478.1988.tb02166.x
    dcterms_title,dcterms_subject,pub_keyword
    -contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution
    10
    5
Loading full text...

Full text loading...

References

  1. BUCHANAN, D.J.1978. The propagation of attenuated SH channel waves. Geophysical Prospecting26, 16–28.
    [Google Scholar]
  2. BUCHANAN, D.J.1987. Dispersion calculations for SH and P‐SV waves in multilayered coal seams. Geophysical Prospecting35, 62–70.
    [Google Scholar]
  3. ČERVENÝ, V and RAVINDRA, R.1971. Theory of Seismic Head Waves.University of Toronto Press.
    [Google Scholar]
  4. DOBRÓKA, M. and ORMOS, T.1982. Absorption‐dispersion relations for Love channel waves. Geophysical Transactions29, 117–128.
    [Google Scholar]
  5. DOBRÓKA, M.1987. Love seam‐waves in a horizontally inhomogeneous three‐layered medium. Geophysical Prospecting35, 502–516.
    [Google Scholar]
  6. JACKSON, P.1985. Horizontal seismic in coal seams: its use by the U.K. coal industry. First Break3, (11), 15–24.
    [Google Scholar]
  7. KREY, Th1963. Channel wave as a tool of applied geophysics in coal mining. Geophysics28, 701–704.
    [Google Scholar]
  8. KREY, TH.1983. Some problems concerning the inversion of observed in‐seam seismic dispersion data. 53rd SEG meeting, Las Vegas , Expanded Abstracts, 55–58.
    [Google Scholar]
  9. KREY, Th., ARNETZL, H. and KNECHT, M.1982. Theoretical and practical aspects of absorption in the application of in‐seam seismic coal exploration. Geophysics47, 1645–1656.
    [Google Scholar]
  10. MASON, I.1981. Algebraic reconstruction of a two‐dimensional seismic channel wave velocity field in the High Hazles seam of Thoresby Colliery. Geophysics46, 298–308.
    [Google Scholar]
  11. RADER, R., SCHOTT, W., DRESEN, L. and RÜTER, H.1985. Calculation of dispersion curves and amplitude‐depth distributions of Love channel waves in horizontally layered media. Geophysical Prospecting33, 800–816.
    [Google Scholar]
  12. YAMSHIKOV, V.S., DANYLOV, V.N. and VARTANOV, A.Z.1986. Love seam‐waves propagating in a cylindrical wave‐guide. Izv. AN SSSR, Fizika Zemli2, 108–111 [in Russian].
     [Google Scholar]
http://instance.metastore.ingenta.com/content/journals/10.1111/j.1365-2478.1988.tb02166.x
Loading
  • Article Type: Research Article

Most Cited This Month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error