Use of magnetic proximity detection systems in the presence of coal.
Carr-JL; Li-J; Smith-AK
2013 SME Annual Meeting, February 24 - 27, Denver, Colorado, Preprint 13-043. Englewood, CO: Society for Mining, Metallurgy, and Exploration, Inc., 2013 Feb; :1-4
Every year, severe injuries and fatalities occur when a miner is struck or pinned by a continuous mining machine, shuttle car, scoop or other piece of mobile mining equipment. Proximity detection systems offer a means to prevent these types of injuries and fatalities by sensing the presence of a miner and disabling machine motion. Although hundreds of these systems are installed and in use in operating coal mines, the influence that coal has on the electromagnetic fields associated with these systems has never been rigorously quantified. NIOSH researchers have conducted tests to measure whether the proximity of coal has a significant influence on a popular design of proximity detection system. The system tested utilizes a low frequency magnetic field generator that would be mounted on the mining machine. At the NIOSH Safety Research Coal Mine in Pittsburgh, researchers measured the performance of a simplified proximity detection system of this type first on the surface then underground at varying distances from a coal face. Analysis of these measurements shows that the presence of coal does not have a measurable impact.
Mining-industry; Underground-mining; Mining-equipment; Coal-mining; Injury-prevention; Accident-prevention; Safety-research; Machine-operation; Detectors; Warning-systems; Electromagnetic-fields; Electromechanical-systems; Electromagnetic-interference; Environmental-engineering; Equipment-design; Equipment-reliability; Magnetic-fields; Magnetic-properties; Measurement-equipment
2013 SME Annual Meeting, February 24 - 27, Denver, Colorado, Preprint 13-043