Analyzing Rib Stability and Support Using a Coal Pillar Rib Rating

Details

• Personal Author:
  Kimutis R ; Mohamed K ; Rashed G ; Xue Y
• Description:
  Researchers from the National Institute for Occupational Safety and Health (NIOSH) are developing a methodology for assessing the stability of coal pillar ribs. The developed methodology is a hybrid numerical-empirical technique that provides ground control engineers with more insight into primary rib support in underground coal mines. The Coal Pillar Rib Rating (CPRR), Primary Rib Support Density (PRSD), and overburden depth are the key elements in the developed rib assessment methodology. The CPRR was developed based on numerical models of different rib compositions. The Unsupported Rib Factor of Safety (RibFOS) for development loading of mining is defined using the CPRR and overburden depth. A database of 118 coal pillar rib cases was collected by NIOSH from active underground coal mines in the United States, MSHA rib fatality reports, and published mining reports in Australia. It was found that all ribs in the longwall mines database are supported. A RibFOS threshold of 1.5 could be used to delineate the boundary between supported and unsupported ribs in room-and-pillar mines. Relationships between the applied PRSD and calculated RibFOS for rib cases were developed. Currently, additional research is underway with the goal of investigating the effects of rock brows on rib stability and support density. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Geology Mining Occupational Health Safety
• Keywords:
  Analytical Methods Coal Mining Ground Control Ground Monitoring Models Rock Mechanics Room And Pillar Mining Underground Mines
• Series:
  Mining Publications
• Publisher:
  Society for Mining, Metallurgy & Exploration, Inc. (SME)
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PMRD - Pittsburgh Mining Research Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-10
• NIOSHTIC Number:
  nn:20064714
• Citation:
  Proceedings of the 40th International Conference on Ground Control in Mining (ICGCM 2021), July 27-28, 2021, virtual event. Englewood, CO: Society for Mining, Metallurgy & Exploration, Inc. (SME), 2021 Jul; :1-10
• Federal Fiscal Year:
  2021
• Peer Reviewed:
  False
• Source Full Name:
  Proceedings of the 40th International Conference on Ground Control in Mining (ICGCM 2021), July 27-28, 2021, virtual event
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:602ad9fef33bad99ba195b9e56c654e84a4ef252d9f9d25054cd45ec0033b4efd93391e78f48cf0aee918773d87d7bc66e4ff02f9ef51e6c92e331d0b11e1f4d
• Download URL:
  https://stacks.cdc.gov/view/cdc/215463/cdc_215463_DS1.pdf
• File Type:
  [PDF - 2.20 MB ]