Results 91 - 100 of 273

• The Effects of Ventilation Controls and Environmental Cabs on Diesel Particulate Matter Concentrations in Some Limestone Mines
  6/1/2008 - Conference papers
  In this investigative study NIOSH measured for sub-micrometer elemental carbon (EC) using two types of control technologies (ventilation and cabs) which are being implemented in limestone mines.
• Empirical Design of Span Openings in Weak Rock based upon Support Type Employed
  6/1/2008 - Conference papers
  This work attempts to provide rock mechanic tools that will enable a mine operator to make economic decisions that will also ensure a safe working environment.
• Improving the Performance of Fan-Powered Dust Collectors in Stone-Cutting Applications
  6/1/2008 - Conference papers
  The objective of the research was to cost-effectively increase the air cleaning volume and improve dust capture efficiency of an off-the-shelf dust collector with a larger motor and blower.
• Artificial Neural Networks to Determine Ventilation Emissions and Optimum Degasification Strategies for Longwall Mines
  6/1/2008 - Conference papers
  This study proposes a principle component analysis (PCA) and artificial neural network (ANN) approach to predict the ventilation methane emission rates of U.S. longwall mines and the optimum combination of degasification boreholes based on the given cha...
• Rock Mass Behavior and Support Response in a Longwall Panel Pre-Driven Recovery Room
  3/1/2008 - Conference papers
  Some surprising results were revealed in this study designed and implemented by NIOSH to evaluate the effectiveness of pre-driven longwall recovery rooms supported with pumpable concrete roof supports.
• Reservoir Modeling-Based Prediction and Optimization of Ventilation Requirements During Development Mining in Underground Coal Mines
  2/1/2008 - Conference papers
  This NIOSH study presents an approach for prediction of methane inflow rates using coalbed methane reservoir modeling which can be used to limit the methane concentrations occurring as a result of the influences of various coalbed and operational parame...
• Using Mine Planning and Other Techniques to Improve Ventilation in Large-Opening Mines
  2/1/2008 - Conference papers
  This paper describes NIOSH research demonstrating that the ventilation of large-opening mines improves significantly by including ventilation requirements in the mine planning process and implementing some practical techniques during mining.
• Development and Evaluation of a Urethane Jacketed Tail Roller for Continuous Mining Machines
  11/1/2007 - Conference papers
  This paper details laboratory noise testing results of a continuous mining machine conveyor system which uses a coating for the tail roller designed to help bring the continuous mining machine into compliance with federal noise regulations.
• Remote Mine Fire Suppression Technology
  11/1/2007 - Conference papers
  This paper presents a summary of remote mine firefighting technologies used in U.S. underground coal mines and the results of completed NIOSH research in that area.
• Results of Noise Measurements from Underground Testing of a Roof Bolting Machine Duty Cycle
  10/1/2007 - Conference papers
  This paper evaluates the duty cycle of a typical roof bolting machine operation at two coal mines. The results provide insight into which portion of the operators’ duty cycle is the most prominent contributor to noise exposure.