Results 231 - 240 of 646

• Improving Silica Dust Controls for Metal/Nonmetal Mining Operations in the United States
  4/1/2007 - Conference papers
  NIOSH researchers are improving protection provided by enclosed cabs on mining equipment, reducing dust generation from surface drills, reducing dust levels in iron ore operations, and developing a new method to clean dust from soiled clothes.
• Characterization of Nanometer and Ultrafine Diesel Aerosols in the Underground Mining Environment
  4/1/2007 - Conference papers
  This paper identifies and characterizes nanometer and ultrafine aerosols emitted by diesel engines in the underground environment and evaluates the effects of selected contemporary control technologies.
• Underhand Cut and Fill Mining as Practiced in Three Deep Hard Rock Mines in the United States
  4/1/2007 - Conference papers
  Details of the operational aspects of backfilling and mining cycles at each of three mines in the western US are presented in this paper, accompanied by a summary of the mechanical properties of the backfill and its in-situ geomechanical behavior.
• Installation of a Digital, Wireless, Strong-Motion Network for Monitoring Seismic Activity in a Western Colorado Coal Mining Region
  4/1/2007 - Conference papers
  This paper describes a seismic monitoring network that has recently been installed in the North Fork Valley coal mining region of western Colorado as part of a NIOSH mine safety technology transfer project with two longwall coal mine operators.
• New Support Concepts for Hard Rock Mining Applications
  4/1/2007 - Conference papers
  This paper presents an overview of recent innovations in support technology for hard rock mining.
• Application of Parametric Column Analysis to Evaluate Eccentric Loading Conditions on Prop Support Performance
  2/1/2007 - Conference papers
  This paper examines the effect of end conditions and load profiles on prop support performance and applies a new analysis methodology based on eccentric loading to determine a factor of safety for load capacity.
• A Methodology for Determining Gob Permeability Distributions and its Application to Reservoir Modeling of Coal Mine Longwalls
  2/1/2007 - Conference papers
  Methane can be a significant hazard in coal mine longwalling operations and extensive methane mitigation techniques are employed by coal mine operators. Reservoir modeling techniques are used to better understand the liberation and migration of methane ...
• Using Ultrasonic Anemometers to Evaluate Face Ventilation Conditions
  2/1/2007 - Conference papers
  The fact that methane ignitions continue to occur at the mining face indicates that monitoring with machine-mounted methanometers does not always indicate the presence of high methane concentrations. Methane concentrations at the face change quickly du...
• An Evaluation of Microseismic Activity Associated with Major Roof Falls in a Limestone Mine: a Case Study
  2/1/2007 - Conference papers
  The goal of this study was to review periods of elevated microseismic activity and determine whether fracture activity rate can be used to anticipate roof falls. The results showed that limited success would be achieved by such a system.
• Virtual Reality in Mine Training
  2/1/2007 - Conference papers
  In 2006, representatives of 14 international organizations met to discuss current VR-related efforts and explore ways to employ VR in the future. This is an overview of the various approaches presented and discusses possible future implementation.