A Parametric Study for the Effect of Dip on Stone Mine Pillar Stability Using a Simplified Model Geometry [2021/08]

Details

• Personal Author:
  Murphy MM ; Rashed G ; Sears MM ; Slaker B
• Description:
  A parametric study was conducted using FLAC3D numerical models to examine the impact of oblique loading on the strength and yield pattern of a stone pillar using two simplified geometry types. In type-1 the side walls of the pillars were assumed to be perpendicular to the roof and the floor, while in type-2 the side walls were assumed to be vertical. These two geometries are frequently used to simplify/model the creation of pillars in dipping mines. Results from the numerical modeling indicate that dipping pillars have reduced strength compared to horizontal pillars, and they are at an elevated risk of failure. Also, an asymmetric failure propagation pattern could be obtained depending on the interaction between the pillar width/height (W/H) ratio, seam dip, in situ stresses and pillar geometry. [Description provided by NIOSH]
• Subjects:
  Mining Occupational Health Safety
• Keywords:
  Author Keywords: Stone Pillar Dipping Pillars Horizontal Stress Mining Industry Models Numerical Modeling Pillar Mechanics Room And Pillar Mining Stone Mines Structural Failure Underground Mining Width-to-height Ratio

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• Series:
  Mining Publications
• ISSN:
  0026-5187
• Document Type:
  Text
• Genre:
  Abstract or Summary
• 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:
  43-45
• Volume:
  73
• Issue:
  8
• NIOSHTIC Number:
  nn:20064131
• Citation:
  Min Eng 2021 Aug; 73(8):43-45
• Email:
  Grashed@cdc.gov
• Federal Fiscal Year:
  2021
• NORA Priority Area:
  Mining
• Peer Reviewed:
  True
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:e0bb65b7b72028f1c9a7d5e63a43588d6b3bd73be4696034b52d9af94dda6ea67c17cc27d092475ace42610f3a942d92f3d91a352c29aee7d084bc890bbf5565
• Download URL:
  https://stacks.cdc.gov/view/cdc/215468/cdc_215468_DS1.pdf
• File Type:
  [PDF - 242.69 KB ]