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Updated: Aug 24, 2025

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Exploring multiple electrical layers overlying coal seams using the transient electromagnetic method.

Yang Yang1, Siqin Liu2, Fangbo Chen3,4

  • 1College of Earth Sciences, Guilin University of Technology, Guilin, Guangxi, China.

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|October 24, 2022
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Summary
This summary is machine-generated.

The one-dimensional Occam algorithm improves deep coal seam exploration by accurately modeling complex electrical layers. This transient electromagnetic method (TEM) application enhances hydrogeological surveys in challenging environments.

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Area of Science:

  • Geophysics
  • Electrical Resistivity Tomography

Background:

  • Transient electromagnetic method (TEM) is vital for coal hydrogeological exploration due to its sensitivity to low-resistivity targets.
  • Deep coal seams and complex overlying strata can limit the accuracy of traditional TEM empirical formulas.

Purpose of the Study:

  • To evaluate the one-dimensional (1D) Occam algorithm for geophysical inversion in coal exploration.
  • To validate the 1D Occam algorithm's effectiveness in modeling complex subsurface electrical structures.

Main Methods:

  • The study involved evaluating the 1D Occam inversion algorithm's principles and application steps.
  • Various two-, three-, and four-layer electrical models were created for inversion analysis.
  • Experimental verification was conducted using large-depth transient electromagnetic data from the Datong Coalfield.

Main Results:

  • Inversion results using the 1D Occam algorithm demonstrated consistency with the defined electrical models.
  • The algorithm successfully identified distinct electrical strata overlying a deep coal seam in the test project.
  • The findings confirm the 1D Occam algorithm's capability in handling complex geological scenarios.

Conclusions:

  • The 1D Occam algorithm provides a reliable method for geophysical inversion in deep coal hydrogeological exploration.
  • This approach overcomes limitations of empirical formulas in complex geological settings.
  • The successful application in the Datong Coalfield highlights its practical utility for identifying overlying strata.