Preliminary Rib Support Requirements for Solid Coal Ribs Using a Coal Pillar Rib Rating

Details

• Personal Author:
  Kimutis R ; Mohamed K ; Rashed G ; Sears MM ; Van Dyke M
• Description:
  Researchers from the National Institute for Occupational Safety and Health (NIOSH) are developing a coal pillar rib rating (CPRR) technique to measure the integrity of coal ribs. The CPRR characterizes the rib composition and evaluates its impact on the inherent stability of the coal ribs. The CPRR utilizes four parameters: rib homogeneity, bedding condition, face cleat orientation with respect to entry direction, and rib height. All these parameters are measurable in the field. A rib data collecting procedure and a simple sheet to calculate the CPRR were developed. The developed CPRR can be used as a rib quality mapping tool in underground coal mines and to determine the potential of local rib instabilities and support requirements associated with overburden depth. CPRR calculations were conducted for 22 surveyed solid coal ribs, mainly composed of coal units. Based on this study, the rib performance was classified into four performance levels: poor, fair, good, and very good. A preliminary minimum primary rib support density (PRSD) line was obtained from these surveyed cases. Two sample cases are presented that illustrate the data collection form and CPRR calculations. [Description provided by NIOSH]
• Subjects:
  Environmental Monitoring Mining Occupational Health Safety
• Keywords:
  Analytical Instrumentation Analytical Processes Coal Mines Environmental Monitoring Environmental Stress Geologic Characterization Geologic Structures Geotechnical Engineering Ground Control Ground Stability Measurement Equipment Monitoring Systems Pillar Design Pillar Mechanics Rock Mechanics Stress Analysis Structural Analysis Structural Engineering Underground Mines

  More +
• Series:
  Mining Publications
• ISBN:
  9780873354806
• Publisher:
  Society for Mining, Metallurgy & Exploration, Inc. (SME)
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Colorado ; OSHA Region 3 ; 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:
  85-96
• NIOSHTIC Number:
  nn:20061137
• Citation:
  Proceedings of the 39th International Conference on Ground Control in Mining (ICGCM 2020), July 28-30, 2020, Canonsburg, Pennsylvania. Klemetti T, Mishra B, Lawson H, Murphy M, Perry K eds. Englewood, CO: Society for Mining, Metallurgy & Exploration, Inc. (SME), 2020 Jul; :85-96
• Contact Point Address:
  Khaled Mohamed, National Institute for Occupational Safety and Health, Pittsburgh Mining Research Division, Pittsburgh, PA
• Editor(s):
  Klemetti T; Mishra B; Lawson H; Murphy M; Perry K
• Federal Fiscal Year:
  2020
• NORA Priority Area:
  Mining
• Peer Reviewed:
  False
• Source Full Name:
  Proceedings of the 39th International Conference on Ground Control in Mining (ICGCM 2020), July 28-30, 2020, Canonsburg, Pennsylvania
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7977f3fc367d2d35975fbe06d755ab35427896b1e9b1a07891946672922dabafdb471bae306417d2e61343f4c89373a06e0d335a2d91c2382a9efe60ba063f78
• Download URL:
  https://stacks.cdc.gov/view/cdc/215327/cdc_215327_DS1.pdf
• File Type:
  [PDF - 6.42 MB ]