U.S. flag An official website of the United States government.
Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

i

Effect of rock fracturing on the modulus, as determined by borehole dilation tests.

Public Domain


Details

  • Personal Author:
    Panek, Louis A.
  • Description:
    In situ dilation tests were made in small boreholes to determine the apparent modulus of rigidity of fractured rock, using the Bureau of Mines cylindrical pressure cell. A steady decrease of modulus occurred with decreasing fracture spacing. Application of the law of similitude leads to an interpretation of this result as a size effect. This interpretation seems capable of rationalizing the results of all types of static tests to determine rock modulus. A good estimate of the apparent modulus for any size of structure, such as a dam foundation or a tunnel, can be derived from a testing program that takes proper account of rock fracturing. [Description provided by NIOSH]
  • Subjects:
  • Series:
    Mining Publications
  • Document Type:
    Text
  • Genre:
    Journal Article
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Pages in Document:
    1-5
  • NIOSHTIC Number:
    nn:10010429
  • Citation:
    Proc 2D Internat Cong Internat Soc Rock Mechanics Belgrade Yugoslavia Sept 21-26 1970 :5 pages
  • Federal Fiscal Year:
    1970
  • Peer Reviewed:
    False
  • Source Full Name:
    Proc. 2D Internat. Cong., Internat. Soc. Rock Mechanics, Belgrade, Yugoslavia, Sept. 21-26 1970
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:7dc847c09aedf140bc731323e8446b4703641ae07d6ad9e7b7238120dab30b8f7dcaa9b938d34d035f87873a0fe7fec262d5d13dcaf290925445e82b6de3b57d
  • Download URL:
  • File Type:
    Filetype[PDF - 168.02 KB ]
PREVIOUS
ON THIS PAGE
Details
CDC STACKS serves as an archival repository of CDC-published products including scientific findings, journal articles, guidelines, recommendations, or other public health information authored or co-authored by CDC or funded partners.

As a repository, CDC STACKS retains documents in their original published format to ensure public access to scientific information.
BACK TO TOP