Report of Investigations 9102: Accurate Directional Borehole Drilling: A Case Study at Navajo Dam, New Mexico

Details

• Journal Article:
  Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9102
• Personal Author:
  Kravits, Stephen J. ; Sainato, Albert ; Finfinger, Gerald L.
• Description:
  This report describes a project conducted by the Bureau of Mines in which the accurate directional drilling of a borehole was demonstrated with the objective of intercepting a designated target. The project was conducted at Navajo Dam in northern New Mexico at the request of the Bureau of Reclamation. Borehole survey and drill logs are provided in an appendix. The trajectory of the demonstration borehole was designed to intercept a 5-ft-radius target at the final or "punchout" distance of 885 ft. The elevation of the borehole at this distance was within the target; the borehole punchout coordinates were 8.81 Ft southwest of the target. As a result of the demonstrated accuracy, the Bureau of Reclamation has contracted the accurate drilling of boreholes as long as 600 ft from the inside of a short tunnel, to control water seepage in the right abutment. This resulted in a substantial cost savings compared to the original plan of constructing a longer tunnel and drilling 150- ft boreholes. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Construction Industry Mining Occupational Health Safety
• Keywords:
  Surface-mining; Surface-properties; Underground-mining; Mining-industry; Coal-mining; Room-and-pillar-mining; Tunneling; Construction
• Source:
  Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9102, 1987 Jan; :1-25
• Series:
  Mining Publications   ; NIOSH Numbered Publications  
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  New Mexico ; OSHA Region 3 ; OSHA Region 6 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRC - Pittsburgh Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  30 pdf pages
• NIOSHTIC Number:
  nn:10005752
• NTIS Accession Number:
  PB88-232152
• Federal Fiscal Year:
  1987
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:5af8f71711e242c3bfe4040f5595e882adfabf8665da08f42eaa575dbe9890817d74e04727e79a1aee1b837189cb922f5cb9b4ec54a731ecda8bf23b7ddf4d8c
• Download URL:
  https://stacks.cdc.gov/view/cdc/9594/cdc_9594_DS1.pdf
• File Type:
  [PDF - 2.46 MB ]