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An assessment of the suitability of five overcoring techniques for stress determination in a jointed basalt

Technical Report ·
OSTI ID:5167340
; ; ; ;  [1];  [2]; ;  [3]
  1. Rockwell International Corp., Richland, WA (USA). Rockwell Hanford Operations
  2. Luleaa Univ. (Sweden)
  3. California Univ., Berkeley, CA (USA)
+ Show Author Affiliations

Overcoring tests were conducted at the Near-Surface Test Facility (NSTF) using the US Bureau of Mines borehole deformation gauge, the C.S.I.R.O. hollow inclusion stress cell, the cast epoxy inclusion, the Lulea triaxial strain cell, and the C.S.I.R. doorstopper'' gauge to assess the suitability of each technique for in situ stress determination in a closely jointed basalt. This effort is in support of the Basalt Waste Isolation Project which is studying the feasibility of locating a nuclear waste repository in basalt. Testing at the NSTF provided information for the evaluation of overcoring techniques so that one or more can be selected to obtain in situ stress data at the reference repository horizon. Even though some problems were experienced, the borehole deformation gauge and doorstopper proved the most successful. 30 refs., 53 figs. 16 tabs.

Research Organization:
Rockwell International Corp., Richland, WA (USA). Rockwell Hanford Operations
Sponsoring Organization:
DOE/RW
DOE Contract Number:
AC06-77RL01030
OSTI ID:
5167340
Report Number(s):
RHO-BWI-TI-129; ON: TI90005864
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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Related Subjects

052002* -- Nuclear Fuels-- Waste Disposal & Storage
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
COMPILED DATA
DATA
DEFORMATION
DRILL CORES
HANFORD RESERVATION
HIGH-LEVEL RADIOACTIVE WASTES
IGNEOUS ROCKS
INFORMATION
MANAGEMENT
MATERIALS
NATIONAL ORGANIZATIONS
NUMERICAL DATA
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVE WASTES
ROCKS
SITE CHARACTERIZATION
STRAINS
UNDERGROUND DISPOSAL
US DOE
US ERDA
US ORGANIZATIONS
VOLCANIC ROCKS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES