REMOTE ELECTROMAGNETIC PROBING OF AN UNDERGROUND COAL BURN CAVITY

A conducting cavity in an underground coal burn was remotely probed from the surface with a wideband electromagnetic induction system. The cavity, located near Hanna, Wyoming, was produced by underground gasification of a 30 foot thick subbituminous coal seam ranging in depth from 300 to 400 feet. The cavity filled with saline ground water after the burn. The wideband loop-loop system employed pseudo-noise and cross-correlation techniques to produce a transient time response in the field. Additional computer processing produced normalized 3-dimensional signature maps in both the time and frequency domains.

Data and Resources

Field Value
Citation "\"E.A. Quincy, D.F. Moore\""
Is NETL associated "\"Yes\""
NETL Point of Contact "\"Roy Long\""
NETL Point of Contact's Email "\"Roy.long@netl.doe.gov\""
NETL program or project "\"KMD\""
Publication Date "\"2/1/1976\""
Groups
  • AmeriGEOSS
  • Global Provider
Tags
  • amerigeo
  • amerigeoss
  • ckan
  • edx
  • energy
  • energy-data-exchange
  • geo
  • geoss
  • global
  • kmd
isopen True
license_id other-open
license_title Other (Open)
metadata_created 2025-11-25T21:03:59.656342
metadata_modified 2025-11-25T21:03:59.656345
notes A conducting cavity in an underground coal burn was remotely probed from the surface with a wideband electromagnetic induction system. The cavity, located near Hanna, Wyoming, was produced by underground gasification of a 30 foot thick subbituminous coal seam ranging in depth from 300 to 400 feet. The cavity filled with saline ground water after the burn. The wideband loop-loop system employed pseudo-noise and cross-correlation techniques to produce a transient time response in the field. Additional computer processing produced normalized 3-dimensional signature maps in both the time and frequency domains.
num_resources 1
num_tags 10
title REMOTE ELECTROMAGNETIC PROBING OF AN UNDERGROUND COAL BURN CAVITY