Analysis of Roof and Pillar Failure Associated with Weak Floor at a Limestone Mine

Details

• Personal Author:
  Ellenberger, John L. ; Esterhuizen, Gabriel S. ; Miller T ; Murphy MM
• Description:
  A limestone mine in Ohio has had instability problems that have led to massive roof falls extending to the surface. This study focuses on the role that weak, moisture-sensitive floor has in the instability issues. Previous NIOSH research related to this subject did not include analysis for weak floor or weak bands and recommended that when such issues arise they should be investigated further using a more advanced analysis. Therefore, to further investigate the observed instability occurring on a large scale at the Ohio mine, FLAC3D numerical models were employed to demonstrate the effect that a weak floor has on roof and pillar stability. This case study will provide important information to limestone mine operators regarding the impact of weak floor causing the potential for roof collapse, pillar failure, and subsequent subsidence of the ground surface. [Description provided by NIOSH]
• Subjects:
  Occupational Health Safety
• Keywords:
  Author Keywords: Case Study Failure Analysis Ground Control Ground Stability Instability Limestone Mines Pillar Mechanics Roof Falls Room And Pillar Mining Underground Limestone Weak Floor

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• Series:
  Mining Publications
• ISSN:
  2095-2686
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Ohio ; OSHA Region 3 ; OSHA Region 5 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  OMSHR - Office of Mine Safety and Health Research
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  471-476
• Volume:
  26
• Issue:
  3
• NIOSHTIC Number:
  nn:20069172
• Citation:
  Int J Min Sci Technol 2016 May; 26(3):471-476
• Contact Point Address:
  M.M. Murphy, Office of Mine Safety and Health Research, National Institute of Occupational Safety and Health, Pittsburgh, PA 15228, USA
• Email:
  MMMurphy@cdc.gov
• Federal Fiscal Year:
  2016
• Peer Reviewed:
  True
• Source Full Name:
  International Journal of Mining Science and Technology
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:56e0a1f1a8266d58db524dd4033af2507f14d1ddcf475f23931ac90f228e90681e50c3c9fcce2e7cbe7f33eac8e983c9fad2f1e4ce8072685d21585e8971f1d3
• Download URL:
  https://stacks.cdc.gov/view/cdc/215226/cdc_215226_DS1.pdf
• File Type:
  [PDF - 1.14 MB ]