Geologic investigations near an underhand cut-and-fill stope, Lucky Friday Mine, Mullan, ID. Report of Investigations/1993

Technical Report · Mon Feb 01 04:00:00 EST 1993

OSTI ID:6130975

Scott, D F

Researchers from the US Bureau of Mines conducted geologic investigations in an area of the Lucky Friday Mine, Mullan, ID, that included the 5300-107 demonstration stope using underhand longwall cut-and-fill mining. Structural analysis of the area suggested that argillite beds form planes of weakness between blocks of brittle quartzite, and energy may be released along these planes and at the junctures of fractures. Mapping argillite beds and fractures in the stope wall rock showed that the planes of these features diverged and that their attitudes corresponded from one wall to the other. Seismic analysis showed that the number and location of events varied as each cut was mined, with about 39 pct of the total number of events occurring above the cut being mined, about 54 pct below, and 7 pct at the same elevation.

• Research Organization: Bureau of Mines, Spokane, WA (United States). Spokane Research Center
• OSTI ID: 6130975
• Report Number(s): PB-93-215739/XAB; BUMINES-RI--9470
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012031* -- Coal
Lignite
& Peat-- Underground Mining-- Strata Mechanics & Control-- (1987-)
ARGILLITE
ATTITUDES
COAL MINING
DEMONSTRATION PROGRAMS
DEVELOPED COUNTRIES
GEOLOGIC FAULTS
GEOLOGIC FORMATIONS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
IDAHO
LONGWALL MINING
MAPPING
MECHANICAL PROPERTIES
MECHANICS
METAMORPHIC ROCKS
MINES
MINING
NORTH AMERICA
QUARTZITES
ROCK BURSTS
ROCK MECHANICS
ROCKS
SEDIMENTARY ROCKS
SEISMICITY
SHALES
STRESSES
UNDERGROUND FACILITIES
UNDERGROUND MINING
USA