Results 21 - 30 of 49

• Ground Control Research: Considering Local Geology to Improve Longwall Pillar Stability
  11/3/2015 - Unpublished documents and reports
  A description of two Ground Control Program projects that aim to enhance mine safety through improved longwall pillar designs that consider a mine’s local geology.
• Ground Control Overview
  11/3/2015 - Research areas
  Ground Control Overview Topic Page
• Pillar Design
  9/22/2015 - Research areas
  Pillar Design Topic Page
• Pillar and Roof Span Design in Stone Mines
  1/1/2010 - Peer reviewed journal articles
  Underground stone mines in the United States use the room and pillar method of mining in relatively flat laying deposits. Roof and rib falls account for 15% of all lost time incidents. This paper presents the result of a study to improve pillar and roof...
• Deep Cover Pillar Recovery in the US
  7/1/2009 - Conference papers
  This paper provides an overview of current deep cover pillar recovery practice.
• Assessment of Stable and Failed Pillars in Underground Limestone Mines
  11/1/2008 - Peer reviewed journal articles
  This paper provides an assessment of the performance of limestone pillars as observed at 98 different locations in 34 mines in the Eastern and Midwestern regions of the United States.
• Pillar Strength and Design Methodology for Stone Mines
  7/1/2008 - Conference papers
  This paper presents a pillar design methodology that was developed from a study of pillar performance in operating stone mines and concludes with guidelines for applying a developed equation and selecting appropriate input parameters.
• The Unpredictable Life Cycle of a Coal Pillar
  7/1/2007 - Conference papers
  A unique circumstance created by monitoring a pre-driven longwall recovery room permitted measuring the stresses of a coal pillar throughout its entire life cycle in less than a week. The complete transformation took place in less than 12 hours.
• Analysis of Multiple Seam Stability
  1/1/2007 - Conference papers
  Analysis of Multiple Seam Stability (AMSS) is a computer program to help mine planners evaluate potential interactions and reduce the risk of ground failure. This paper details a NIOSH study of multiple seam interactions and the development of AMSS.
• The Evolution of Intelligent Coal Pillar Design: 1981-2006
  8/1/2006 - Conference papers
  This paper discusses progress in the science of coal pillar design over the past 25 years and some of the current research needs.