Seismic Communications to Underground Sites (Sterling Hill Mine Experiments)
Abstract
Seismic signal transmission experiments made at the Sterling Hill Mine of the New Jersey Zinc Co., Ogdensburg, New Jersey, are described. Using less than 100 watts primary power, nominal 80 Hz CW signals and pulsed CW signals were transmitted from experimental seismic transducers placed on rock out-crops atop Sterling Hill. These signals were received with portable 80 Hz resonant experimental seismic transducers at various locations in the mine. Resultant experimental data such as variations of signal amplitudes versus depth, signal propagation velocities, and wave shape distortions, etc., are analyzed and evaluated. Implications regarding the design and operation of HARD LINE communications circuits for underground hardened sites are discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1967
- Accession Number
- AD0828962
Entities
People
- Kenneth J. Murphy
- Kurt Ikrath
- Ronald F. Johnson
- Wilhelm Schneider
Organizations
- United States Army Communications-Electronics Command