In-situ stress from hydraulic fracture measurements in G Tunnel, Nevada Test Site

Technical Report · Wed Apr 01 04:00:00 EST 1981

DOI:https://doi.org/10.2172/6623319· OSTI ID:6623319

Smith, C.; Vollendorf, W. C.; Warren, W. E.

Hydraulic fracture work in G Tunnel, Nevada Test Site, performed to obtain the in-situ stress state is discussed. Field equipment and procedures are described; analysis is developed to relate the hydraulic fracture pressures to the in-situ stress state. Pressure data are analyzed to provide estimates of the stress state at a number of locations in the tunnel complex. A unique feature of the work is the mineback - a mining process in which the rock is cut away to reveal the actual plane of the fracture. Advantages, limitations, and problem areas associated with extracting in-situ stress fields from hydraulic fracture pressure records are discussed in detail.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6623319
• Report Number(s): SAND-80-1138
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450200* -- Military Technology
Weaponry
& National Defense-- Nuclear Explosions & Explosives
58 GEOSCIENCES
580100 -- Geology & Hydrology-- (-1989)
BOREHOLES
CAVITIES
COMMINUTION
CONTAINMENT
EQUIPMENT
EXPLOSIONS
FRACTURING
GEOLOGIC DEPOSITS
HYDRAULIC FRACTURING
MECHANICS
MINING EQUIPMENT
NUCLEAR EXPLOSIONS
ROCK MECHANICS
STRESS ANALYSIS
STRESSES
TUNNELS
UNDERGROUND EXPLOSIONS