Development of a Comprehensive Pillar and Roof Monitoring System at a Steeply Dipping Underground Limestone Mine

Details

• Personal Author:
  Buchan G ; Iannacchione, Anthony T. ; McElhinney D ; Minoski T ; Murphy M ; Rashed G ; Slaker B ; Van Dyke M ; Winfield J
• Description:
  The National Institute for Occupational Safety and Health (NIOSH) has previously established pillar design guidelines for the underground stone mining industry. These guidelines were created from an empirical database of pillar observations and were largely drawn from shallow, flat-lying mining operations. Current trends forecast a great amount of underground stone mines developing under deeper cover, higher seam dips, and more frequent multiple-seam mining configurations than in the past. The complex loading conditions and limited experience in these environments presents a substantial increased risk of ground failure. To investigate these loading conditions, NIOSH has installed a pillar and roof monitoring system at an underground limestone mine in central Pennsylvania. The mine is operating in a seam with dips ranging from 13 to 18 degrees and overburdens ranging from 275 m (900 ft) to 425 m (1,400 ft). Instrumentation installed in an undeveloped pillar and in surrounding strata is currently measuring pillar and roof behavior in response to stress redistribution during excavation. Laser scans are being used to measure ground displacement and changes in conditions associated with local mining conditions and significant geological features. Initial stress measurements show a gradual increase in stress in response to mining, and stress changes that correspond with blasts. The seismic system is operational, with calibration events signaling on each of the 18 sensors. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety
• Keywords:
  Blasting Environmental Control Environmental Stress Excavations Geologic Formations Ground Control Ground Monitoring Ground Stability Guidelines Limestone Mines Load Monitoring Miners Mine Safety Mining-industry Monitoring Systems Monitors Pillar Design Pillar Mechanics Roof Support Systems Sensors Stone Mines Strata Control Structural Analysis Underground Miners Underground Mines Underground Mining

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• Series:
  Mining Publications
• Publisher:
  Society for Mining, Metallurgy, and Exploration, Inc.
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Colorado ; Minnesota ; OSHA Region 3 ; OSHA Region 5 ; OSHA Region 8 ; 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:
  1-6
• NIOSHTIC Number:
  nn:20051324
• Citation:
  2018 SME Annual Meeting, February 25-28, 2018, Minneapolis, Minnesota, preprint 18-018. Englewood, CO: Society for Mining, Metallurgy, and Exploration, Inc., 2018 Feb; :1-6
• Contact Point Address:
  M. Murphy, NIOSH, Pittsburgh, PA
• CAS Registry Number:
  Limestone (CAS RN 1317-65-3)
• Federal Fiscal Year:
  2018
• NORA Priority Area:
  Mining
• Peer Reviewed:
  False
• Source Full Name:
  2018 SME Annual Meeting, February 25-28, 2018, Minneapolis, Minnesota, preprint 18-018
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:f0dc8eef1fda3ce62ec52776ed717690d9213c5351df1f621789c4f6976a687bda38e2c3c5134ed8e615333ac60ae2270af208279f610a5d3210ab9e08e969bf
• Download URL:
  https://stacks.cdc.gov/view/cdc/227653/cdc_227653_DS1.pdf
• File Type:
  [PDF - 1.15 MB ]