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Results 41 - 50 of 96
7/1/2010 - Peer reviewed journal articlesAn air quality survey was conducted at a precious metals refinery in order to evaluate worker exposures to airborne metals and to provide detailed characterization of the aerosols.
6/1/2010 - Peer reviewed journal articlesResearchers at NIOSH are developing methods for characterizing ultrafine aerosols in workplaces. One method includes the detailed analysis of collected particles using electron microscopy (EM).
The Effects of Passive Diesel Particulate Filters on Diesel Particulate Matter Concentrations in Two Underground Metal/Nonmetal Mines6/1/2010 - Conference papersIn this study, NIOSH measured the atmospheric concentrations of DPM and gases in two mines in order to evaluate the effects of various control strategies on the atmospheric DPM concentrations.
3/1/2010 - Peer reviewed journal articlesThis work presents a fractal porous medium model to predict gob porosity and permeability for controlling methane flow and to predict air leakage into the gob.
Reconciling Longwall Gob Gas Reservoirs and Venthole Production Performances Using Multiple Rate Drawdown Well Test Analysis12/1/2009 - Peer reviewed journal articlesIn this paper, the production rate-pressure behaviors of six gob gas ventholes drilled over three adjacent panels were analyzed by using conventional multi-rate drawdown analysis techniques.
6/1/2009 - Peer reviewed journal articlesThis paper presents data on the limiting (minimum) oxygen concentration in the presence of added N2, methane, propane, ethylene, carbon monoxide, and hydrogen and some of their binary mixtures, and addresses flammable concentration limits.
1/1/2009 - Peer reviewed journal articlesIn this paper, single-component gas sorption and transient diffusion processes are described within coal matrix exhibiting bimodal pore structure.
6/1/2008 - Conference papersThis paper summarizes the modeling efforts conducted by NIOSH in the U.S. and CSIRO in Australia to address various gas management issues encountered in longwall mines using the application of computational fluid dynamics (CFD) and numerical reservoir m...
Effects of Sintered Metal Diesel Particulate Filter System on Diesel Aerosols and Nitric Oxides in Mine Air6/1/2008 - Conference papersThis NIOSH study was conducted to establish the effects of a diesel particulate filter (DPF) system with sintered metal substrate on the concentrations and size distributions of nano and ultrafine aerosols and concentrations of nitric oxides in undergro...
11/1/2007 - Peer reviewed journal articlesA discussion the spatio-temporal volumetric strains in a consolidated Pittsburgh seam coal sample which were evaluated while both confining pressure and carbon dioxide CO2 pore pressure were evaluated.