This final report documents the work done by Arthur D. Little, Inc. (ADL) on behalf of the U.S. Bureau of Mines, Pittsburgh Mining and Safety Research Center (PMSRC), on Contract H0122026 (which began in August of 1971). Under this contract ADL provided technical assistance to the Bureau on a task basis on virtually all aspects of the Bureau's programs related to present and planned emergency and operational communications and miner location systems for underground coal mines. The work consisted of independent investigations, analyses, experiments, breadboard and prototype hardware development, workshops and technology transfer seminars on mine communications, and on-going evaluations and guidance related to the Bureau's contracted programs...
"Eight coal mines were visited to determine their communications usage and requirements. Presently a...
During the detection phase, several procedures can be used to improve the signal-to-noise ratio (SIN...
The paper presents a block diagram of the recorder of electromagnetic and acoustic signals. The reco...
Volume II of this report (Contract No. H0122026) presents the findings of a short intensive assessme...
During the first quarter of 1973 ADL worked closely with PMSRC staff, under an extremely compressed ...
The instrumentation specification in the National Academy of Engineering (NAE) report of March, 1970...
The Bureau of Mines has conducted field studies in coal mines throughout the United States to determ...
"The Bureau of Mines has conducted field studies in coal mines throughout the United States to deter...
Proper design characteristics for a seismic system to locate miners during a mine disaster are consi...
Elementary concepts of seismic wave properties are reviewed to establish a framework for discussing ...
Two different techniques were used to make measurements of the absolute value of electromagnetic noi...
"Eight coal mines were visited to determine their communications usage and requirements. Presently a...
The question of earth models has repeatedly arisen in our work. An accurate representation of the se...
"Advanced communication and monitoring systems were developed and demonstrated in three underground ...
"Characteristics of metal-nonmetal mines were evaluated to determine the suitability of applying the...
"Eight coal mines were visited to determine their communications usage and requirements. Presently a...
During the detection phase, several procedures can be used to improve the signal-to-noise ratio (SIN...
The paper presents a block diagram of the recorder of electromagnetic and acoustic signals. The reco...
Volume II of this report (Contract No. H0122026) presents the findings of a short intensive assessme...
During the first quarter of 1973 ADL worked closely with PMSRC staff, under an extremely compressed ...
The instrumentation specification in the National Academy of Engineering (NAE) report of March, 1970...
The Bureau of Mines has conducted field studies in coal mines throughout the United States to determ...
"The Bureau of Mines has conducted field studies in coal mines throughout the United States to deter...
Proper design characteristics for a seismic system to locate miners during a mine disaster are consi...
Elementary concepts of seismic wave properties are reviewed to establish a framework for discussing ...
Two different techniques were used to make measurements of the absolute value of electromagnetic noi...
"Eight coal mines were visited to determine their communications usage and requirements. Presently a...
The question of earth models has repeatedly arisen in our work. An accurate representation of the se...
"Advanced communication and monitoring systems were developed and demonstrated in three underground ...
"Characteristics of metal-nonmetal mines were evaluated to determine the suitability of applying the...
"Eight coal mines were visited to determine their communications usage and requirements. Presently a...
During the detection phase, several procedures can be used to improve the signal-to-noise ratio (SIN...
The paper presents a block diagram of the recorder of electromagnetic and acoustic signals. The reco...