- Equipment, tools, and parts
- Geologic conditions and events
- Hazard prevention and control
- Hazards and exposures
- Mine locations, excavations, and structures
- Mining types and methods
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Results 1 - 10 of 40
9/1/2007 - Conference papersThis paper reviews how simultaneous application of three basic elements reduces the methane explosion hazard at coal mine working faces: (1) adequate ventilation, (2) regular monitoring of gas concentrations, and (3) elimination of ignition sources.
Threshold Powers and Delays for Igniting Propane and Butane-Air Mixtures by CW Laser-heated Small Particles11/1/2006 - Peer reviewed journal articlesNIOSH researchers studied laser safety in potentially flammable environments. Researchers measured threshold igniting powers as a function of beam diameter for butane and propane-air mixtures by laser-heating targets placed on optical fiber tips.
Methane-Air Mixtures Ignited by CW Laser-Heated Targets on Optical Fiber Tips: Comparison of Targets, Optical Fibers, and Ignition Delays9/1/2006 - Peer reviewed journal articlesResearchers conducted experiments to estimate the mean and standard deviation of laser powers needed to ignite 6% methane-air atmospheres using single-mode optical fiber tips covered by two types of iron oxide mixed with a ceramic adhesive.
9/1/2004 - Information CircularsThis report analyzes mine fires for all U.S. underground and surface coal mining categories by state and 2-year time periods during 1990-1999.
8/1/2003 - Peer reviewed journal articlesLaser-based instruments are used in areas where coal dust ignition presents a safety hazard. This NIOSH study determines when an optical beam may be considered a potential ignition source in underground coal mines or coal storage facilities.
5/1/2000 - Peer reviewed journal articlesOptical technologies have progressed rapidly in the past 15 years. NIOSH is conducting a study to help provide a scientific basis for developing appropriate safety guidelines for optical equipment in underground coal mines.
3/1/1999 - Conference papersEmerging laser technologies are quickly gaining acceptance in the industrial workplace. This NIOSH research provides a scientific basis for developing safety guidelines for optical equipment in the presence of flammable methane gas and coal dust.
12/1/2019 - Peer reviewed journal articlesThis paper discusses the implications of floor dust erosion on rock dusting and sampling procedures for explosion hazard assessment.
Evaluating the Inherent Safety of Li-ion Batteries in Portable Electronics Used in Underground Mine Environments11/22/2016 - Contracts and cooperative agreementsA contract to experimentally evaluate the inherent safety of Li-ion batteries used in portable electronic devices for underground mine applications.
10/22/2016 - Research projectsA project to define the geologic and stress criteria associated with an elevated risk of coal bursts, considering both U.S. and international experience through visits to coalfields.