Mining Publication: Development of a Through-the-Earth Monitor System

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Original creation date: December 1980

Contract/MOA Report - December 1980

NIOSHTIC2 Number: 10002172

Arthur D. Little, Inc. U.S. Department of the Interior, Bureau of Mines, Contract No. H0177098. NTIS No. PB/81-237646, OFR 99-81, 1980 Dec; :1-29

The objective of this program was to design and build a self-contained system for remote monitoring of the atmosphere in mines. The system developed uses the mine pager phone line as the primary communication channel and also has the capability of using 208 Hz in the ELF band for wireless transmission through the earth. The depth for through-the-earth transmission is expected to be about 80 to 90 meters in high conductivity soil and is limited by the noise level in the ELF band-pass filters. The underground components of the TEM System are energized by mine power through a battery charger - storage battery power supply. In the event of mine power failure the battery capacity is more than sufficient for one week's operation with interrogations every four hours.

Authors: Arthur D. Little, Inc.

Image of publication Development of a Through-the-Earth Monitor System
Contract/MOA Report - December 1980

NIOSHTIC2 Number: 10002172

Arthur D. Little, Inc. U.S. Department of the Interior, Bureau of Mines, Contract No. H0177098. NTIS No. PB/81-237646, OFR 99-81, 1980 Dec; :1-29


Page last reviewed: 10/5/2012 Page last updated: 10/5/2012