Concepts in Prototype Testing for In Situ Geomechanical Investigations at Yucca Mountain

by B. A. Luke, Sandia Natl Lab, United States,
R. E. Finley, Sandia Natl Lab, United States,

Abstract: Geomechanical investigations comprise a significant portion of the site characterization program to be conducted at Yucca Mountain, the site of a proposed repository for nuclear waste. The investigations will include a number of large-scale experiments that will be conducted in an exploratory shaft facility at the site. A program of prototype testing has been initiated to ensure the success of these expensive and complex experiments. At present, the prototype testing program addresses three problems in rock mechanics: measurement of rock-mass strength, measurement of joint properties in situ, and measurement of rock-mass response to thermally-induced loading. Active areas of development in support of these tests include cutting deep, narrow slots in rock and fabricating high-pressure flatjacks.

Subject Headings: Field tests | Radioactive wastes | Site investigation | Rock masses | Thermal properties | Compression tests | Waste sites | Load tests

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