Experimental research on sealing of boreholes, shafts and ramps in welded tuff
- Rock Engineering International, Tucson, AZ (United States)
Laboratory and in-situ experiments have been conducted to determine the mechanical and hydraulic performance of cement borehole seals in densely welded Apache Leap tuff. Test results indicate that under saturated conditions, commercial expansive cement can provide good bond strength and adequate hydraulic performance for borehole seal under changing stress conditions. The cement seal should be installed at the intact portion of the opening, and should have a length-to-diameter ratio greater than four. Drying increases borehole plug permeability and decreases mechanical and hydraulic bonds at the plug-rock interface. In-situ testing indicates that installation procedure may significantly affect the cement plug performance.
- Research Organization:
- US Nuclear Regulatory Commission (NRC), Washington, DC (United States). Div. of Regulatory Applications; Southwest Research Inst., San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses
- OSTI ID:
- 433011
- Report Number(s):
- NUREG/CP-0150; CONF-9409238-; ON: TI96011022; CNN: Contract NRC-04-86-113; TRN: 96:006559-0007
- Resource Relation:
- Conference: Workshop on rock mechanics issues in repository design and performance assessment, Rockville, MD (United States), 19-20 Sep 1994; Other Information: PBD: Apr 1996; Related Information: Is Part Of Workshop on rock mechanics issues in repository design and performance assessment; PB: 265 p.
- Country of Publication:
- United States
- Language:
- English
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