Test plan for suitability assessment of five overcoring stress measurement techniques
Tests are to be conducted at the Near-Surface Test Facility (NSTF) to assess the suitability of five overcoring techniques for in situ stress determination in a jointed basalt. The overcoring methods to be investigated use the following instrumentation to measure strain relief by overcoring a pilot borehole: USBM borehole deformation gage, CSIRO hollow inclusion stress cell, cast epoxy inclusion, the Lulea triaxial strain cell and the doorstopper'' biaxial strain cell. The tests are to provide data regarding the state of stress below the NSTF. This information is to be used in the evaluation of each method of overcoring. During the course of field testing, an attempt is to be made to adapt conventional overcoring techniques and analytical methods to the basalt medium. If overcoring stress determination in basalt is shown suitable, then additional studies will be identified to further adapt a technique for use at depth. In addition to the five overcoring techniques to be tested at the NSTF, stress measurements by Hydrofracturing are to be conducted to provide data for direct comparison with overcoring results. 16 refs., 18 figs.
- Research Organization:
- Rockwell International Corp., Richland, WA (USA). Rockwell Hanford Operations
- Sponsoring Organization:
- DOE/RW
- DOE Contract Number:
- AC06-77RL01030
- OSTI ID:
- 5201496
- Report Number(s):
- RHO-BWI-TP-015; ON: TI90005871
- Country of Publication:
- United States
- Language:
- English
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In-situ stress measurement in a jointed basalt: the suitability of five overcoring techniques
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053000 -- Nuclear Fuels-- Environmental Aspects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
BASALT
BOREHOLES
CAVITIES
COMMINUTION
COMPILED DATA
DATA
FRACTURING
HANFORD RESERVATION
HIGH-LEVEL RADIOACTIVE WASTES
HYDRAULIC FRACTURING
IGNEOUS ROCKS
INFORMATION
MANAGEMENT
MATERIALS
NATIONAL ORGANIZATIONS
NUMERICAL DATA
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVE WASTES
ROCKS
STRAINS
TESTING
UNDERGROUND DISPOSAL
US DOE
US ERDA
US ORGANIZATIONS
VOLCANIC ROCKS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES