Results 291 - 300 of 646

• Development and Application of Reservoir Models for the Evaluation and Optimization of Longwall Methane Control Systems
  6/1/2006 - Conference papers
  This paper describes the development of reservoir models for the longwall mining environment and their application for investigating the influence of various completion design parameters on the methane drainage effectiveness of gob gas ventholes.
• Effect of Water Sprays on Airflow Movement and Methane Dilution at the Working Face
  6/1/2006 - Conference papers
  Tests were conducted in a full-scale ventilation gallery to determine the influence of mining machine-mounted water sprays on airflows and methane concentrations at the face when blowing ventilation systems are used. Test results using different spray a...
• Fire-Generated Smoke Rollback Through Crosscut from Return to Intake - Experimental and CFD Study
  6/1/2006 - Conference papers
  Two mine fire experiments conducted in NIOSH Pittsburgh's Safety Research Coal Mine demonstrated that smoke from diesel-fuel fires in a return airway can develop into a roof layer that can migrate upwind, and smoke can penetrate an intake airway.
• Methods to Determine the Status of Mine Atmospheres - an Overview
  4/1/2006 - Conference papers, Peer reviewed journal articles
  This paper serves as an overview to remind and/or instruct readers about gas-sampling methodologies and gas analyses to assist in determining the status of underground atmospheres.
• Assessing Roof Fall Hazards for Underground Stone Mines: A Proposed Methodology
  3/27/2006 - Conference papers
  A methodology to assess the risk for a roof fall is proposed in a preliminary fashion based on engineering judgment acquired from extensive underground stone mine experience and examination of related literature.
• Extreme Multiple Seam Mining in the Central Appalachian Coalfields
  3/1/2006 - Conference papers
  More than 300 case histories have been collected from underground mines mainly in central Appalachia. This paper focuses on several of the more challenging multiple seam mining situations that have been encountered.
• Remotely Installed Mine Seals for Mine Fire Control
  3/1/2006 - Conference papers
  NIOSH is conducting full-scale tests at its Lake Lynn Experimental Mine to evaluate/improve remote mine seal construction technology, focusing on technology to completely close the mine opening, & reporting results from use of grout-based materials.
• Technical Development of the Coal Dust Explosibility Meter
  1/1/2006 - Conference papers
  NIOSH's Office of Mine Safety and Health Research, in collaboration with MSHA Technical Support, has devised a prototype handheld device, Coal Dust Explosibitlity Meter (CDEM), to assess the potential explosibility of a coal and rock dust mixture.
• An Overview of Standing Roof Support Practices and Developments in the United States
  10/1/2005 - Conference papers
  This paper provides an overview of the support design and application philosophy in the United States.
• Heavy Construction Equipment Noise Study Using Dosimetry and Time-Motion Studies
  10/1/2005 - Conference papers
  The focus of this research was to determine the noise exposures of heavy construction equipment operators while documenting the workers’ tasks, (i.e. hauling, moving, and/or pushing construction material).