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Mining Publication: Electromagnetic Surface Fields Due to a Magnetic Dipole Buried in a Three-Layered Earth
Keywords: Numerical modeling
Original creation date: October 1982
Authors: SM Shope
Report of Investigations - October 1982
Download PDF Document (0.47 MB)
NIOSHTIC2 Number: 10002569
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, NTIS No. PB83-148064, RI 8702, 1982 Oct; :1-22
The Bureau of Mines electromagnetic trapped miner location and communications system requires a thorough understanding of through-the-earth electromagnetic wave propagation. An earth model incorporating a magnetic dipole buried in a three-layered earth has been developed. The dipole source is located in the second subsurface layer. By application of proper limiting values, the three-layered model is reduced to two different two-layered models and eventually to the homogeneous half-space model. The solutions are in the form of infinite integrals. A numerical analysis was carried out and a computer program written to evaluate the surface magnetic fields. Numerical values for the magnetic field at the point above the source are presented in a variety of models.
Image of publication Electromagnetic Surface Fields Due to a Magnetic Dipole Buried in a Three-Layered EarthReport of Investigations - October 1982
Download PDF Document (0.47 MB)
NIOSHTIC2 Number: 10002569
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, NTIS No. PB83-148064, RI 8702, 1982 Oct; :1-22
See Also
Above-the-Earth Field Contours for a Dipole Buried in a Homogeneous Half-Space
Degasification System Selection for U.S. Longwall Mines Using an Expert Classification System
Determination of In Situ Deformation Modulus for Cemented Rockfill
Development of Multiple Regression Functions for Performance Prediction of Gob Gas Ventholes for Sealed and Active Longwall Mines
Effects of Weak Bands on Pillar Stability in Stone Mines: Field Observations and Numerical Model Assessment
Elastic and Shear Moduli of Coal Measure Rocks Derived from Basic Well Logs Using Fractal Statistics and Radial Basis Functions
Numerical Model Calibration for Simulating Coal Pillars, Gob and Overburden Response
Numerical Modeling of Paste Sills in Underhand Cut & Fill Stopes
Pillar Strength and Design Methodology for Stone Mines
Stochastic Modeling of Gob Gas Venthole Production Performances in Active and Completed Longwall Panels of Coal Mines
Page last reviewed: November 16, 2015
Page last updated: November 16, 2015
Content source: National Institute for Occupational Safety and Health, Mining Program
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