Results 1 - 10 of 32

• Evaluation of Face Dust Concentrations at Mines Using Deep-Cutting Practices
  1/1/2011 - Reports of Investigations
  Dust surveys determined if deep-cut mining expose face workers to higher levels of respirable dust. Study findings indicate that levels on bolting faces did not appear to be affected by longer cycles associated with deep-cut mining practices.
• Guidelines for the Control and Monitoring of Methane Gas on Continuous Mining Operations
  4/1/2010 - Reports of Investigations, Safety guidelines, tips, and checklists
  This NIOSH publication demonstrates how existing and new engineering controls can be used to reduce face methane levels.
• Methods for Controlling Explosion Risk at Coal Mine Working Faces
  9/1/2007 - Conference papers
  This paper reviews how simultaneous application of three basic elements reduces the methane explosion hazard at coal mine working faces: (1) adequate ventilation, (2) regular monitoring of gas concentrations, and (3) elimination of ignition sources.
• Prediction of Longwall Methane Emissions and the Associated Consequences of Increasing Longwall Face Lengths: A Case Study in the Pittsburgh Coalbed
  6/1/2006 - Conference papers
  NIOSH conducted a study with the goal of characterizing methane emissions from increasing face lengths in the Pittsburgh Coalbed and providing a method of predicting emissions increases from longer faces and of planning for more methane control.
• Predicting Methane Emissions from Longer Longwall Faces by Analysis of Emission Contributors
  6/1/2006 - Conference papers
  NIOSH conducted a longwall methane emission and mining time study at a Pittsburgh Coalbed mine to predict emissions from a longer face, and developed and applied mathematical formulas and constants to characterize four emission contributors.
• Methane Emissions and Airflow Patterns on a Longwall Face: Potential Influences from Longwall Gob Permeability Distributions on a Bleederless Longwall Panel
  2/1/2018 - Peer reviewed journal articles
  An article evaluating longwall face ventilation practices at a mine study site.
• Improved Dust Control Methods for Longwall Mining
  10/22/2016 - Research projects
  A project to develop control technologies that will reduce the most common sources of respirable dust on the longwall face, which will in turn protect the health of mine workers on the longwall face.
• CFD Modeling of Methane Distribution at a Continuous Miner Face With Various Curtain Setback Distances
  7/1/2015 - Peer reviewed journal articles
  A report focused on validating a series of computational fluid dynamics (CFD) models using full-scale ventilation gallery data that assessed how curtain setback distance impacted airflow patterns and methane distributions at an empty mining face.
• Hydraulic Conductivity Changes and Influencing Factors in Longwall Overburden Determined by Slug Tests in Gob Gas Ventholes
  10/1/2009 - Peer reviewed journal articles
  This study presents the results of core-log analyses from the exploration boreholes, the analyses of face advance rates, and the results of downhole monitoring studies performed in gob gas ventholes.
• 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.