Research and development contract for coal mine communication system. Volume 3 - theoretical data base.
Laubengayer WC; Ware KM; Gehring RD; Wilson LR; Decker RP; Anderson DT
Washington, DC: U.S. Department of the Interior, Bureau of Mines, Contract H0232056, 1974 Nov; 3:1-187
Eight coal mines were visited to determine their communications usage and requirements. Presently available equipment was surveyed and evaluated to determine its applicability to the needs of the mines. The requirements, as determined from the surveys, and the capabilities, as determined from analysis and experiments, were summarized. Volume 3 contains all information used in predicting the performance of low-frequency transmissions in through-the-earth systems, along with the predictions themselves for typical situations.
Mining-industry; Mining-equipment; Underground-mining; Coal-mining
CP; Final Contract Report
NTIS Accession No.
OFR 69(3)-75; Contract-H0232056
Washington, DC: U.S. Department of the Interior, Bureau of Mines, Contract H0232056
Collins Radio Company