Last data update: May 30, 2025. (Total: 49382 publications since 2009)
Records 1-3 (of 3 Records) |
Query Trace: King GW[original query] |
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Reducing dust and respirable crystalline silica near conveyors using a hybrid dust control system
Parks DA , King GW , Koski BD , Bierie GS , Sunderman CB , Wilson SE , Miller AL . Min Metall & Explor 2024 Occupational exposures to respirable dusts and respirable crystalline silica (RCS) is well established as a health hazard in many industries including mining, construction, and oil and gas extraction. The U.S. National Institute for Occupational Safety and Health (NIOSH) is researching methods of controlling fugitive dust emissions at outdoor mining operations. In this study, a prototype engineering control system to control fugitive dust emissions was developed combining passive subsystems for dust settling with active dust filtration and spray-surfactant dust suppression comprising a hybrid system. The hybrid system was installed at an aggregate production facility to evaluate the effectiveness of controlling fugitive dust emissions generated from two cone crushers and belt conveyors that transport crushed materials. To evaluate effectiveness of the system, area air measurements (n = 14 on each day for a total of 42 samples) for respirable dust were collected by NIOSH before, during, and after the installation of the dust control system in the immediate vicinity of the crushers and the nearby conveyor transfer point. Compared to pre-intervention samples, over short periods of time, geometric mean concentrations of airborne respirable dust were reduced by 37% using passive controls (p = 0.34) but significantly reduced by 93% (p < 0.0001) when the full hybrid system was installed. This proof-of-concept project demonstrated that the combined use of active and passive dust controls along with a spray surfactant can be highly effective in controlling fugitive dust emissions even with minimal use of water, which is desirable for many remote mining applications. © This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2024. |
Preventing fatal winch entanglements in the US southern shrimp fleet: A research to practice approach
Lincoln JM , Woodward CC , King GW , Case SL , Lucas DL , Teske TD . J Safety Res 2016 60 119-123 Introduction: During 2000-2011, 35 injuries (8 fatal) involving winches were reported to the Coast Guard in the Southern shrimp fleet. Injuries involving the main winch drums had a higher risk for fatal outcomes compared to injuries involving the winch cathead (RR = 7.5; 1.1-53.7). The objective of this study was to design effective solutions to protect deckhands from entanglement hazards posed by winches found on the vessels in the Southern shrimp fleet. Methods: Based on injury characteristics, site visit observations, and input from vessel owners, NIOSH determined that the design and implementation of effective main-winch guarding was a feasible first-step in mitigating the entanglement hazard. Design considerations for stationary guards favor systems that are simple, affordable, durable, unobtrusive, and will not interfere with normal fishing operations. In addition, an auxiliary-stop method was tested to prevent entanglements in try-net winches. Results: Standardized passive guards were designed for three commonly found main winch models. Initial prototype guards have been sea-tested. The design of six additional guards is underway, for a total of three iterations for each winch model identified. These will incorporate features found to be valued by fishermen, will be more efficient, and will reduce the overall cost of fabrication and maintenance. Sea testing of these iterations continues. The auxiliary-stop circuit control prototype system was designed to prevent entanglements in the try-net winch and is currently being sea tested. Discussion: NIOSH has completed initial designs for stationary-winch guards. Through collaborations with shrimper associations and safety groups, the successfully tested winch guard and auxiliary stop designs will be made available to qualified welders and craftsmen to use. This approach has proven effective in preventing other types of winch injuries. Practical applications: Injury epidemiologic methods and industry input are an effective way to identify workplace hazards and to design effective safety interventions to control hazards. |
Intelligent machine guard monitoring: a wireless system to improve miner safety
Reyes MA , King GW , Miller GG . IEEE Ind Appl Mag 2014 20 (2) 69-75 Researchers at the National Institute for Occupational Safety and Health (NIOSH) are developing an intelligent machine guard monitoring and proximity detection system designed to mitigate machine entanglement and maintenance-related injuries and fatalities prevalent in the mining industry. This experiment was designed to develop a monitoring system consisting of mechanical/magnetic switches and sensor beacons capable of wirelessly transmitting information about a belt conveyor's machine guards to a remote computer. The data transfer was carried out via an off-the-shelf wireless communication system and displayed on a Web-based user interface. Successful operational tests demonstrated the functionality and effectiveness of the system in monitoring guard placement status and remotely identifying the location of any removed guards using each sensor's unique identification number. The integration of wireless safety technologies such as this system is expected to improve the safety of miners by providing additional protections against machine guardingrelated injuries. |
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