Ground-penetrating radar for strata control.
Church-RH; Webb-WE; Boyle-JR Jr.
Tuscaloosa, AL: U.S. Department of the Interior, Bureau of Mines, RI 8954, 1985 Jan; :1-16
As part of the Bureau of Mines health and safety research program in strata control, a ground-penetrating radar (GPR) system capable of penetrating approximately 10 ft into the mine roof has been devised to identify anomalistic conditions. The GPR system consists of a transmitter with carrier frequencies of 250, 500, and 1,000 mhz, utilizing a dipole antenna, and a receiver, consisting of a dipole antenna fed into a sampler with a time base housed in a storage oscilloscope. A computer was utilized for data acquisition and data processing. Data analysis by computer enhancement revealed recognizable return radar signatures from the middle man rock and main roof of the test site. These stratigraphic anomalies can be cataloged for recognizable features, which from the past history of the mine may have been shown to create strata control problems. Early recognition of such features could lead to immediate corrective actions and result in the saving of lives. This report is based upon work done under a memorandum of agreement between the Bureau of Mines, U.S. Department of the Interior, and the University of Alabama.
adar-detection; Layers; Roofs; Accident-prevention; Underground-mining; Coal-mines; Electric-measuring-instruments; Radars; Computer-applications
IH; Report of Investigations
NTIS Accession No.
Tuscaloosa, AL: U.S. Department of the Interior, Bureau of Mines, RI 8954