Permeability change near instrumentation holes in jointed rock: implications for the tuff radionuclide-migration field experiment
In order to assess in situ joint permeability near waste repositories, it has been proposed that instrumentation holes with axes parallel to the joint plane be drilled. However, the drill holes after the normal stress across the joint. The resultant stress concentration decreases the joint aperture and can significantly affect the joint permeability. Different intersections of the hold axis relative to the joint plane were examined utilizing a plane-strain, elastic analysis. It was found that a tangential joint intersection minimized the normal stress change. Stress along the joint increased by 10 to 15 percent and the permeability-aperture product decreased to 65 to 70 percent of its original flow.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 59468
- Report Number(s):
- SAND-81-2584; ON: DE82018552
- Resource Relation:
- Other Information: PBD: Jun 1982
- Country of Publication:
- United States
- Language:
- English
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