Results 11 - 20 of 32

• Mine Face Ventilation: A Comparison of CFD Results Against Benchmark Experiments for the CFD Code Validation
  10/1/2007 - Peer reviewed journal articles
  To transfer CFD expertise to analyze and design a face-ventilation system, a comprehensive validation study of current CFD tools against mining-related benchmark experiments is required. This study was dedicated to the methane behavior in an empty (cont...
• Development of Coal Mine Face Ventilation Systems During the 20th Century
  8/1/2007 - Peer reviewed journal articles
  This article focuses on U.S. Bureau of Mines (USBM) and NIOSH research to examine factors that had a significant influence on mine face ventilation design during the past century.
• Evaluation of Support and Ground Response as Longwall Face Advances into and Widens Pre-Driven Recovery Room
  7/1/2007 - Conference papers
  A cooperative study was conducted to evaluate the effectiveness of (partially) pre-driven longwall recovery rooms supported with pumpable roof supports.
• Longwall Shield Recovery Using Mobile Roof Supports
  7/1/2007 - Conference papers
  This paper addresses both the safety and the operational issues associated with mobile roof support (MRS) usage during shield recovery. It also discusses new developments, including the use of the inherently safer battery powered MRS's.
• 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...
• 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...
• The Effects of Water Spray Placement for Controlling Respirable Dust and Face Methane Concentrations
  4/1/2006 - Peer reviewed journal articles
  A series of laboratory evaluations examined the impact of water spray pressure, curtain setback distance, and external and underboom spray use for controlling respirable dust levels and sulfur hexafluoride tracer gas concentrations around a continuous m...
• Using Ultrasonic Anemometers to Evaluate Factors Affecting Face Ventilation Effectiveness
  1/1/2006 - Peer reviewed journal articles
  A test system was developed at NIOSH's ventilation test gallery to measure airflow using a three-axis ultrasonic anemometer. The gallery was used to simulate face airflow conditions in underground mines having a blowing curtain. Airflow data were used t...
• Bolt Load Changes During Initial Face Advance and Cross-Cut Breakthrough
  8/1/2004 - Conference papers
  The San Juan Mine and the National Institute for Occupational Safety and Health conducted a study to measure how development mining affected bolt loads.
• Measurement of Airflow in a Simulated Underground Mine Environment Using an Ultrasonic Anemometer
  1/1/2004 - Peer reviewed journal articles
  Reports on a test system and computer program developed for using a three-axis ultrasonic anemometer to measure airflow in a simulated mine entry.