Results 341 - 350 of 618

• Factors Affecting Coal Particle Ignition Under Oxyfuel Combustion Atmospheres
  1/1/2011 - Peer reviewed journal articles
  Thirteen coals of different rank were tested for ignition propensity in a 20-L explosion chamber simulating oxyfuel combustion gas conditions. The effects of coal type, coal concentration, O2 in CO2 atmospheres, and particle size were investigated.
• Electromyography of the Thigh Muscles during Lifting Tasks in Kneeling and Squatting Postures
  1/1/2011 - Peer reviewed journal articles
  This paper examines the EMG responses of knee extensors/flexors to lifting in kneeling or squatting postures and discusses the impact of posture and kneepads on muscle recruitment and explores the implications for work in such postures.
• Evidence that Reducing Knee Injuries in Underground Mining may have a Substantial Impact on Mine Company Finances
  12/1/2010 - Peer reviewed journal articles
  To encourage mining companies to implement knee injury training programs and interventions, NIOSH performed an analysis of workers’ compensation data for one underground coal mine in Illinois and six in Pennsylvania.
• Stochastic Modeling of Gob Gas Venthole Production Performances in Active and Completed Longwall Panels of Coal Mines
  11/1/2010 - Peer reviewed journal articles
  This paper describes a practical approach for implementing stochastic determination of gob gas ventholes production performances and for generalizing the prediction capability of deterministic models.
• Breaking the Ice on the Booster Fan Dilemma in US Underground Coal Mines
  10/1/2010 - Peer reviewed journal articles
  This paper presents the history of booster fan use in coal mines of the United States during the last 90 years. Changes in regulations, as well as advantages and disadvantages of booster fan use, are discussed. Research and petitions for booster fan use...
• In Situ Estimation of Roof Rock Strength using Sonic Logging
  9/1/2010 - Peer reviewed journal articles
  Sonic travel time logging of exploration boreholes is routinely used in Australia to obtain estimates of coal mine roof rock strength. This paper describes research aimed at developing a correlation for use in the U.S.
• MultiFit4: An Improved System for Insert-Type
  9/1/2010 - Peer reviewed journal articles
  This paper describes the results of initial testing of the NIOSH Multifit4 system that was designed to be used as a tool by qualified researchers to evaluate hearing protector training and fit interventions at worksites.
• Characterizing Exposures to Airborne Metals and Nanoparticle Emissions in a Refinery
  7/1/2010 - Peer reviewed journal articles
  An 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.
• Reservoir Diagnosis of Longwall Gobs Through Drawdown Tests and Decline Curve Analyses of Gob Gas Venthole Productions
  7/1/2010 - Peer reviewed journal articles
  During longwall mining, fracturing and relaxation in the gob creates new and highly permeable flow paths. The production rate-pressure behavior of a gob gas venthole (GGV) drilled over a longwall panel was analyzed by using multi-rate drawdown and decl...
• Reducing Control Selection Errors Associated with Underground Bolting Equipment
  7/1/2010 - Peer reviewed journal articles
  The aims of this research were to determine the effectiveness of arbitrary shape coding in reducing selection error rates in a virtual analogy of roof-bolting and whether any advantages exist for mirror or place layouts for dual control situations.