Results 1 - 10 of 17

• Case History of the Response of a Longwall Entry Subjected to Concentrated Horizontal Stress
  2/1/2007 - Peer reviewed journal articles
  A study of ground behavior, reinforcement performance and stress redistribution looked at a longwall tailgate under severe horizontal stress. Comparison to field results showed that a FLAC-2D model captured the significant roof and support behavior.
• Performance of Roof Support Under High Stress in a U.S. Coal Mine
  2/1/2004 - Conference papers
  The primary goal of this project was to obtain detailed data on the interaction between the mine roof and the support elements for use in modeling studies. 
• 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.
• Reservoir Rock Properties of Coal Measure Strata of the Lower Monongahela Group, Greene County (Southwestern Pennsylvania), from Methane Control and Production Perspectives
  3/1/2009 - Peer reviewed journal articles
  This study presents reservoir and elastic properties of coal measure rocks in the Lower Monongahela Group in Greene County, southwestern Pennsylvania, with results that can be used as data sources for reservoir studies related to methane control.
• Communicating Hearing Loss Information to Young Children: Effectiveness of Lecture and Printed Materials
  10/1/2003 - Peer reviewed journal articles
  This study evaluated two training techniques for educating young children about noise and hearing loss.
• High Stress Mining Under Shallow Overburden in Underground U.S. Stone Mines
  11/1/2002 - Conference papers
  This study of the Chestnut Ridge Anticline found that high levels of horizontal stress are to be expected and that local geologic and topographic structures can alter the magnitude and possibly the orientation of the horizontal stress field.
• Failure Characteristics of Roof Falls at an Underground Stone Mine in Southwestern Pennsylvania
  8/1/2001 - Conference papers
  The location and time of 2,007 microseismic emissions from a limestone mine were compared with mine face development and mine layout characteristics. The occurrence of roof failure zones appears to be associated with mine plan characteristics.
• Injury Analysis of Pennsylvania Small Surface Coal Mines
  3/1/1998 - Conference papers
  This paper is a descriptive analysis of injuries and fatalities at small surface bituminous coal mining companies in Pennsylvania.
• Evaluation of Alternative Placement of Longwall Gob Gas Ventholes for Optimum Performance
  1/1/1994 - Reports of Investigations
  Production trends were analyzed for 82 gob gas ventholes on 7 longwall panels in the Lower Kittanning Coalbed, Pennsylvania.
• Geologic Factors Influencing the Gas Content of Coalbeds in Southwestern Pennsylvania
  1/1/1988 - Reports of Investigations
  A Bureau of Mines geologic study of Pennsylvanian and Permian coalbeds in southwestern Pennsylvania was undertaken to determine the effects of coalbed geology and petrology on in situ coalbed gas contents.