Results 311 - 320 of 646

• Using Ventilation Control Technology to Reduce Respirable Dust Exposures at U.S. Metal/Nonmetal Mining Operations
  7/1/2005 - Conference papers
  This manuscript will discuss five different research studies conducted by the National Institute for Occupational Safety and Health (NIOSH) which use ventilation in some application to lower workers' respirable dust exposures at surface and metal/nonmet...
• Methods for Evaluating Explosion Resistant Ventilation Structures
  7/1/2005 - Conference papers
  Large-scale explosion tests conducted within the multiple-entry section of NIOSH's Lake Lynn Experimental Mine (LLEM) are currently the only accepted test method for deeming a seal design suitable for use in U.S. mines. These explosion tests are labor-i...
• Coal Mine Inertisation By Remote Application
  6/1/2005 - Conference papers
  The focus of this paper is the use of a GAG 3A jet engine system to either combat large out-of-control fires or render an entire mine inert when access to problem areas is difficult or impossible.
• Application of Gas-Enhanced Foam at the Excel No. 3 Mine Fire
  6/1/2005 - Conference papers
  This paper presents a discussion of the firefighting approach at the Excel No. 3 Mine and an analysis of the results of the application of gas-enhanced foam technology.
• Characteristics of Mining-Induced Seismicity Associated with Roof Falls and Roof Caving Events
  6/1/2005 - Conference papers
  This study used microseismic emissions to help identify three local rock failure processes. It was also shown that analysis of microseismic emissions can aid in assessing the degree of instability associated with these local rock failure processes.
• Evaluation of Gas-Enhanced Foam for Suppressing Coal Mine Fires
  6/1/2005 - Conference papers
  NIOSH, in cooperation with U.S. Foam Technologies, Inc., conducted a series of experiments at its Lake Lynn Experimental Mine to study the stability, transport, control, and fire extinguishing effectiveness of nitrogen-enhanced foam technology.
• Development of Numerical Models to Investigate Permeability Changes and Gas Emission around Longwall Mining Panel
  6/1/2005 - Conference papers
  This paper describes the application of a finite difference program to develop a geomechanical model that predicts permeability changes within the rock mass.
• The Use of Nitrogen-Enhanced Foam at the Pinnacle Mine Fire
  6/1/2005 - Conference papers
  This paper evaluates the effectiveness of remotely applied nitrogen-enhanced foam to aid in efforts to isolate and suppress a mine fire.
• Numerical Analysis of the Impact of Longwall Panel Width on Methane Emissions and Performance of Gob Gas Ventholes
  5/1/2005 - Conference papers
  NIOSH has initiated a reservoir modeling effort to better understand the interaction of the various geotechnical factors influencing gas flow within and to the underground longwall mining environment. A focus of this modeling effort has been (1) the pre...
• Design Spans: Underhand Cut-and-Fill Mining
  4/1/2005 - Conference papers
  A major concern in sill mat design is the loading and strengths associated with the overlying sill mat. This paper reviews past practice and present observations and measurements from over 10 mines and outlines concerns for design requirements.