Technical Services for Mine Communications Research. Commercially Available Equipment for Coal Mine Emergency Warning Systems.
Foulkes-JD; Lagace-RL; Welz-AW
NTIS: PB/272-459 Available for Reference At Bureau Libraries :77 pages
An investigation was made to determine whether commercially available equipment could be used to engineer effective emergency warning systems for underground coal mines. The Bureau of Mines and the Mining Enforcement and Safety Administration established that the preferred system should operate over the existing pager phone twisted pair and broadcast an audio alarm. Applicable equipments such as voice band tone signaling equipment, alarm sounding equipment, mine telephones, and complete alarm systems from over 30 manufacturers are listed. Factors affecting the range over which an alarm could be detected in representative mine situations were studied. Audio alarm systems meeting the requirements can be installed and representative systems are described.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/272-459 Available for Reference At Bureau Libraries
A. D. Little, Inc.