Detection of Coal Mine Workings Using High-resolution Earth Resistivity Techniques.
Peters-WR; Campbell-TM; Sturdivant-VR
NTIS: PB/81-215378 :80 pages
Shallow underground voids resulting from early coal mining and other resource recovery activities over the past several decades are now being recognized as a significant cause of ground subsidence problems in developing urban areas. U.S. Army requirements for an effective method for detecting and mapping subversive abandoned tunnels have resulted in a surface-operated automatic earth resistivity survey system with a digital computer data processing system. Field tests aimed at demonstrating the system performance resulted in successful detection of tunnels having depth-to-diameter ratios up to 15 to 1. Under the sponsorship of the Bureau of Mines, a similar system was designed and constructed for use in the detection of coal mine workings. This report discusses the hardware and software aspects of the system and the application of the high- resolution earth resistivity method to the survey and mapping of abandoned coal mine workings.
CP; Final Contract Report;
NTIS Accession No.
Southwest Research Institute