Monitoring of Multiple-Level Stress Interaction at Two Underground Limestone Mines

Details

• Personal Author:
  Floyd K ; Gangrade V ; Minoski T ; Murphy MM ; Rashed G ; Slaker BA ; Van Dyke M
• Description:
  The National Institute for Occupational Safety and Health (NIOSH) has previously established pillar design guidelines for shallow, flat-lying mines and single-level operations. Little guidance exists for ground control design in multiple-level stone mines and understanding the interactions between levels would allow engineers to better select interburden thicknesses and the necessary amount of pillar columnization. To investigate these loading conditions in multiple-level environments, NIOSH has partnered with two separately operated multiple-level mines to study the stress interaction between the levels as undermining occurs. The first mine is located in Tennessee with up to a 243-m overburden and 7-m interburden thickness between levels. The second mine is located in Kentucky with a 304-m overburden and 26-m interburden thickness between levels. The monitoring program at these sites includes stressmeters and LiDAR for tracking stress redistributions and rock displacement in response to undermining. Monitoring is ongoing, but numerical modeling results show the expected interaction between levels. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety
• Keywords:
  Ground Control Limestone Mines Mining Industry Pillar Mechanics Rock Mechanics Room And Pillar Mining Structural Engineering Underground Mining
• Series:
  Mining Publications
• Publisher:
  Society for Mining, Metallurgy and Exploration
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Arizona ; Colorado ; OSHA Region 3 ; OSHA Region 4 ; OSHA Region 8 ; OSHA Region 9 ; Pennsylvania ; Tennessee
• 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:
  1-6
• NIOSHTIC Number:
  nn:20059779
• Citation:
  MineXchange: 2020 SME Annual Conference & Expo, February 23-26, 2020, Phoenix, Arizona, preprint 20-079. Englewood, CO: Society for Mining, Metallurgy & Exploration, 2020 Feb; :1-6
• Contact Point Address:
  B. A. Slaker, CDC NIOSH, Pittsburgh, PA
• CAS Registry Number:
  Limestone (CAS RN 1317-65-3)
• Federal Fiscal Year:
  2020
• NORA Priority Area:
  Mining
• Peer Reviewed:
  False
• Source Full Name:
  MineXchange: 2020 SME Annual Conference & Expo, February 23-26, 2020, Phoenix, Arizona, preprint 20-079
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:845658c0942a6af7e3cd587554803ceeacb452febb8a4d6b735ac183b8c88f5c89680904f725f5cd06e47ee05df853ec587099300fc882b05bae65e5952598cf
• Download URL:
  https://stacks.cdc.gov/view/cdc/215288/cdc_215288_DS1.pdf
• File Type:
  [PDF - 674.51 KB ]