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  • 1
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    Geoelectric determination of quality changes and tectonic disturbances in coal deposits (1986)
    In:  Geophys. Prospecting, Bonn, Hungarian Academy of Science, vol. 34, no. 2, pp. 1067-1081, pp. B04102, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1986
    Schlagwort(e): Geoelectrics ; Applied geophysics ; Mining geophysics ; Geol. aspects
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    BIBLIOGRAFIE SEISMOLOGIE
  • 2
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    Parameter estimation and fault detection by three-component seismic and geoelectrical surveys in coal mine (1987)
    In:  Geophys. Prosp., Leipzig, 3-4, vol. 35, no. 2, pp. 832-863, pp. L06305, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1987
    Schlagwort(e): Seismics (controlled source seismology) ; Channel waves ; Three component data ; Seismics (controlled source seismology) ; Geoelectrics
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 3
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    Detection of tectonic disturbances associated with a coal bed by geophysical measurements in mine drifts (1974)
    Hungarian Academy of Science
    In:  Acta Geodaetica, Geophysica et Montaristica, Bonn, Hungarian Academy of Science, vol. 9, no. 2, pp. 111-119, pp. B04102, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Mining geophysics
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    BIBLIOGRAFIE SEISMOLOGIE
  • 4
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    Untertägige Parameterbestimmung und Vorfelderkundung mit Hilfe von seismischen 3-Komponenten Registrierungen und geoelektrischen Messungen (1987)
    Dt. Geophys. Ges.
    In:  Vortrag gehalten auf der 47. Jahrestagung der DGG, Clausthal-Zellerfeld, Dt. Geophys. Ges., vol. 10, no. AFGL-TR-87-0244, pp. 569-576
    Details
    Publikationsdatum: 1987
    Schlagwort(e): Mining geophysics ; Geoelectrics ; Seismics (controlled source seismology)
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 5
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    The geoelectrical seam-sounding instrument GEO-3 (1984)
    Technical University of Heavy Industry
    In:  Internal report of the Department of Geophysics, Miskolc, Hungary, Technical University of Heavy Industry, vol. 10, no. 302, pp. 465-469
    Details
    Publikationsdatum: 1984
    Schlagwort(e): Geoelectrics ; Applied geophysics ; Mining geophysics
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 6
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    The detection of tectonic faults by means of the in-seam seismic transmission and reflection method (1982)
    Technical University of Heavy Industry
    In:  Internal report of the Department of Geophysics, Miskolc, Hungary, Technical University of Heavy Industry, vol. 10, no. 302, pp. 465-469
    Details
    Publikationsdatum: 1982
    Schlagwort(e): Mining geophysics ; Channel waves ; Geol. aspects ; Reflection seismics ; Seismics (controlled source seismology)
    Standort Signatur Erwartet Verfügbarkeit
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    BIBLIOGRAFIE SEISMOLOGIE
  • 7
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    Report of the cooperation between the Ruhr-Universität Bochum, Federal Republic of Germany and the Department of Geophysics, Technical University of Heavy Industry (1986)
    Technical University of Heavy Industry
    In:  preprint, Miskolc, Hungary, Technical University of Heavy Industry, vol. 10, no. 302, pp. 465-469
    Details
    Publikationsdatum: 1986
    Schlagwort(e): Geoelectrics ; Mining geophysics ; Channel waves ; Project report/description
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    BIBLIOGRAFIE SEISMOLOGIE
  • 8
    Digitale Medien
    Digitale Medien
    JOINT INVERSION OF SEISMIC AND GEOELECTRIC DATA RECORDED IN AN UNDERGROUND COAL MINE (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 39 (1991), S. 0 
    Details
    ISSN: 1365-2478
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geologie und Paläontologie , Physik
    Notizen: Until the present time the ‘ rock-coal-rock’ layer sequence and offsets in coal-seams in underground coal mines have been detected with the aid of seismic waves and geoelectric measurements. In order to determine the geometrical and petrophysical parameters of the coal-seam situation, the data recorded using seismic and geoelectric methods have been inverted independently. In consequence, the inversion of partially inaccurate data resulted in a certain degree of ambiguity. This paper presents the first results of a joint inversion scheme to process underground vertical seismic profiling data, geolectric resistivity and resistance data.The joint inversion algorithm makes use of the damped least-squares method and its weighted version to solve the linearized set of equations for the seismic and geolectric unknowns. In order to estimate the accuracy and reliability of the derived geometrical and petrophysical layer parameters, both a model covariance matrix and a correlation matrix are calculated. The weighted least-squares algorithm is based on the method of most frequent values (MFV). The weight factors depend on the difference between measured data and those calculated by an iteration process.The joint inversion algorithm is tested by means of synthetic data. Compared to the damped least-squares algorithm, the MFV inversion leads to smaller estimation errors as well as lower sensitivities due to the choice of the initial model. It is shown that, compared to an independent inversion, the correlation between the model parameters is definitely reduced, while the accuracy of the parameter estimation is appreciably increased by the joint inversion process. Thus the ambiguity is significantly reduced.Finally, the joint inversion algorithm using the MFV method is applied to underground field data. The model parameters can be derived with a sufficient degree of accuracy, even in the case of noisy data.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2478.1991.tb00334.x
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 9
    Digitale Medien
    Digitale Medien
    PARAMETER ESTIMATION AND FAULT DETECTION BY THREE-COMPONENT SEISMIC AND GEOELECTRICAL SURVEYS IN A COAL MINE (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 35 (1987), S. 0 
    Details
    ISSN: 1365-2478
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geologie und Paläontologie , Physik
    Notizen: Three-component seismic and geoelectrical in-mine surveys were carried out in Lyukobanya colliery near Miskolc, Hungary to determine the in situ petrophysical parameter distributions and to detect inhomogeneities in the coal seam. The seismic measurements comprise an underground vertical seismic profile, using body waves, and an in-seam seismic amplitude-depth distribution and transmission survey, using channel waves. The geoelectrical measurements are based on the drift- and seam-sounding method.Interval traveltime-, amplitude-, multiple-filter- and polarization analysis methods are applied to the seismic data. They lead to a five-layer model for the strata including the coal seam. The coal seam and two underlying beds act as a seismic waveguide. The layer sequence supports the propagation of both normal and leaky mode channel waves of the Love- and Rayleigh type. A calculation of the total reflected energy for each interface using Knott's energy coefficients shows that the velocity ranges of high reflection energy and of normal and leaky mode wavegroups coincide. The excitation of wavegroups strongly depends on the seismic source. A simultaneous inversion of a geoelectrical drift- and seam-sounding survey prevents misinterpretations of the seismic data by clearly identifying the low-velocity coal seam as a high-resistivity bed. Calculations of dispersion and sounding curves improve the resolution of the slowness and resistivity in each layer.Both diminished amplitudes and distortions in the polarization of transmission seismo-grams and decreasing resistivities in a geoelectrical pseudosection of the coal seam are related to an inhomogeneity.A calculation of synthetic seismograms for Love and Rayleigh channel waves with the finite-difference and the Alekseev-Mikhailenko method agrees well with the field data for the main features, i.e., particular arrivals in the wave train, wavegroups, velocities and symmetries or asymmetries.This in-mine experiment demonstrates that the simultaneous acquisition, processing and interpretation of seismic and geoelectrical data improve the lithological interpretation of petrophysical parameter distributions. Coal seam inhomogeneities can also be detected more reliably by the two independent surveys than by one alone.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2478.1987.tb02261.x
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 10
    Digitale Medien
    Digitale Medien
    GEOELECTRIC DETERMINATION OF QUALITY CHANGES AND TECTONIC DISTURBANCES IN COAL DEPOSITS (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 34 (1986), S. 0 
    Details
    ISSN: 1365-2478
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Geologie und Paläontologie , Physik
    Notizen: A new underground geoelectric method is presented for the determination of small tectonic disturbances and barrenings in coal seams. The distribution of the apparent resistivity can be mapped from the measured apparent resistance data by using a recently developed geoelectric imaging method. The applicability of the methods are proved by in situ measurements and by a model experiment.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2478.1986.tb00513.x
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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