Scholarly record
COMPARATIVE ANALYSIS OF COHESION COEFFICIENTS AND INTERNAL FRICTION ANGLES OF ROCKS DEPENDING ON THE FUNCTIONAL TYPE OF THE MOHR-COULOMB ENVELOPE.
Abstract
The strength chart of rocks is an important characteristic in the development of minerals, the design of various geo-engineering structures. In its construction, the strength data of laboratory mechanical experiments are used, which include indirect or direct tensile, uniaxial compression, and triaxial compression according to the Karman's scheme. The necessary minimum information is the data from the first two types of test. Mohr-Coulomb circles are constructed for each specimen in the coordinate system "shear stress - normal stress". Then the envelope to circles is obtained, it's the so-called strength chart of rocks. According to the latter, the friction coefficient and the angle of internal friction are determined. In this paper, a comparative analysis of the last two characteristics is carried out depending on the linear or nonlinear representation of the envelope as a functional dependence of the shear stress on the normal stress. The calculations were based on reference data on the ultimate strength for uniaxial compression and tension of rocks. Linear dependence was constructed as a tangent, carried out to two Mohr-Coulomb circles, and non-linear - in the form of a fractional-irrational expression, which is recommended by the domestic standard.
Publication Impact Profile
Publication details
References7
GOST 21153.2-84. Rocks. Methods for determining the ultimate strength under uniaxial compression. - Russian Federation, 1984.
GOST 21153.3-85. Rocks. Methods for determining the tensile strength under uniaxial tension. - Russian Federation, 1985.
ASTM D 7012-04. Standard test method for compressive strength and elastic moduli of intact rock core specimens under varying states of stress and temperatures. — 8 p.
ASTM D 3967-95a. Standard test method for splitting tensile strength of intact rock core specimens. — 3 p.
Karkashadze G. G. Mechanical destruction of rocks, Russia, 2004, 222 p.
Melnikov N.V., Rzhevsky V.V., Protodyakonov M.M. Reference book (cadastre) of the physical properties of rocks, Russia, 1975, 279 p.
GOST 21153.8-88. Rocks. Methods for determining ultimate strength under conventional triaxial compression. - Russian Federation, 1988.
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.
