Novel, low-vibration excavation techniques for underground radioactive waste storage
Conference
·
OSTI ID:60801
- Advanced Excavation & Cutting Technologies, State College, PA (United States)
In order to meet the construction specifications of the challenging Yucca Mountain nuclear waste repository, novel, low-vibration tunneling and shaft sinking techniques must be applied. Conventional roadheaders, even with reduced cutting speed, cannot be employed due to the high strength and widely varying physical properties of the rock formations. The Multi Tool Miner (MTM) concept utilizes both an impact hammer, for efficient hard rock mining, and a cutter head, tooled with drag-bits (picks), to profile tunnel walls down to the sound, undisturbed rock, in order to meet the 10,000-year stability requirement for underground structures. As the operational requirements and rock conditions at the Yucca Mountain site are not suitable for wide, transverse {open_quotes}ripper{close_quotes} cutting drums, a small diameter, in-line, {open_quotes}milling auger{close_quotes} cutter head was developed. The synergetic combination of high-production hammer excavation and precise milling will facilitate the construction of stable, long-life underground structures within the budget limitations mandated by Congress.
- Research Organization:
- American Society of Civil Engineers, New York, NY (United States); American Nuclear Society, La Grange Park, IL (United States)
- OSTI ID:
- 60801
- Report Number(s):
- CONF-940553--Vol.2
- Country of Publication:
- United States
- Language:
- English
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