Design of Different Shapes of Drill Shroud to Reduce Dust Deposit Using Computational Fluid Dynamics Method

Details

• Personal Author:
  Potts, J. Drew ; Reed, William R. ; Zheng Y
• Description:
  Effective dust control using drill shroud air-blocking shelves was confirmed previously through laboratory tests, field studies, and computational fluid dynamics (CFD) simulations. However, when the drilling machine moves to different locations, deposits on these shelves can produce a large dust cloud. To minimize the dust exposure hazard, this study modified the drill shroud air-blocking shelves by using the concept of angle of repose to eliminate the deposits while at the same time, confining the dust inside the drill shroud. Two types of drill shroud inner shapes were evaluated using CFD models: U-shaped and V-shaped. In addition, a drill shroud with 45 degree blocking shelves was built to examine its dust control capacity. The angle of repose used to minimize dust problems during mast lowering was shown to be effective in reducing the dust problems during drilling. However, care must be taken to use a properly designed shroud because the V-shaped drill shroud can potentially exacerbate dust leakage. [Description provided by NIOSH]
• Subjects:
  Dust Occupational Health Safety
• Keywords:
  Author Keywords: Angle Of Repose CFD Computational Fluid Dynamics Control Methods Drilling Drilling Operation Dust Control Equipment Design Respirable Dust Respirable Dust Control Simulation Methods

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• Series:
  Mining Publications
• ISSN:
  1923-6026
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PMRD - Pittsburgh Mining Research Division ; OD - Office of the Director
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  11-20
• Volume:
  14
• Issue:
  1
• NIOSHTIC Number:
  nn:20068096
• Citation:
  CIM J 2023 Jan; 14(1):11-20
• Contact Point Address:
  Y. Zheng, National Institute for Occupational Safety and Health, Pittsburgh, PA
• Email:
  vea1@cdc.gov
• Federal Fiscal Year:
  2023
• NORA Priority Area:
  Mining
• Peer Reviewed:
  True
• Source Full Name:
  CIM Journal
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:e0a8cc8b300c9c74b7eda22804fb9130d14b76d64eba4255d44a81d19e9ead179e05a48353727be24ffde030e147af2c3c8b0318fdb84752753f472b0fd7eb00
• Download URL:
  https://stacks.cdc.gov/view/cdc/215592/cdc_215592_DS1.pdf
• File Type:
  [PDF - 3.28 MB ]