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Effect of Rock Fracturing on the Modulus, as Determined by Borehole Dilation Tests.

Authors
Panek-LA
Source
Proc 2D Internat Cong Internat Soc Rock Mechanics Belgrade Yugoslavia Sept 21-26 1970 :5 pages
Link
NIOSHTIC No.
10010429
Abstract
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.
Publication Date
19700101
Document Type
OP;
Fiscal Year
1970
Identifying No.
OP 173-70
Source Name
Proc. 2D Internat. Cong., Internat. Soc. Rock Mechanics, Belgrade, Yugoslavia, Sept. 21-26 1970
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division