Accession Number : AD0718080

Title :   Geomechanical Model Study of the Failure Modes of Jointed Rock Masses.

Descriptive Note : Technical rept.,

Corporate Author : CORPS OF ENGINEERS OMAHA NEBR MISSOURI RIVER DIV

Personal Author(s) : Rosenblad,John Lyndon

Report Date : JAN 1971

Pagination or Media Count : 396

Abstract : A geomechanical model study was conducted with the objective of adding to the present knowledge of the strength, behavior, and failure of a jointed rock mass. No specific prototype is simulated by this study. The program of study consists of five phases: the development of a rock-like model material; the design and construction of the loading apparatus; the development of a complete instrumentation system; the testing of jointed and unjointed models; and the analysis, interpretation, and presentation of the test data. The rock-like model material developed for use in the model tests has characteristics of rock in general and a schistose gneiss rock in particular. It is a high density, low void ratio material obtained by vibrating a sand-gypsum cement-water mix on a vibrating table. Measurements taken and recorded for each test are the applied pressures and the resulting strains and displacements in jointed or unjointed models. (Author)

Descriptors :   (*ROCK, MECHANICAL PROPERTIES), (*UNDERGROUND STRUCTURES, EXPLOSION EFFECTS), MODELS(SIMULATIONS), LOADS(FORCES), STRESSES, FAILURE(MECHANICS), STRAIN(MECHANICS), VIBRATION, COMPRESSIVE PROPERTIES, CONCRETE, TEST METHODS, TEST EQUIPMENT, METAMORPHIC ROCK, THESES

Subject Categories : Geology, Geochemistry and Mineralogy
      Structural Engineering and Building Technology

Distribution Statement : APPROVED FOR PUBLIC RELEASE