Rock mechanics investigations at the Lucky Friday Mine. Part 3. Calibration and validation of a stope-scale finite-element model. Report of Investigations/1992
The U.S. Bureau of Mines has been conducting a series of rock mechanics investigations at the Lucky Friday Mine in the Coeur d'Alene Mining District of northern Idaho. The present study uses rock deformation measurements to validate and calibrate a geomechanical model of the experimental Lucky Friday underhand longwall (LFUL) stope on the 5100 level of the Lucky Friday Mine, Mullan, ID. The calibrated three-dimensional, finite-element model and measurements of rock mass displacement show a correlation of 0.795. The calibration reduces rock mass modulus to 14 to 17 pct of laboratory values and rock mass strength (with an energy rule) to 37 to 41 pct of laboratory values. The model suggested that stress-related ground control problems would be encountered west of the stope where the vein makes a right-angle turn and then splits.**INVALID KEYWORDS: stope mining, calibrating, measurement, strength, finite difference theory, displacement, mine bursts, lucky friday mine, mullan, idaho, rock mass
- Research Organization:
- Bureau of Mines, Spokane, WA (United States). Spokane Research Center
- OSTI ID:
- 6878647
- Report Number(s):
- PB-93-132850/XAB; BUMINES-RI-9434
- Resource Relation:
- Other Information: See also Part 2, PB--93-132843
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL MINING
ROCK MECHANICS
BENCH-SCALE EXPERIMENTS
CALIBRATION
CONTROL
DEFORMATION
DEPTH
HYPOTHESIS
IDAHO
INVESTIGATIONS
LEADING ABSTRACT
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
STRESSES
THEORETICAL DATA
THREE-DIMENSIONAL CALCULATIONS
VALIDATION
ABSTRACTS
ADMINISTRATIVE PROCEDURES
DATA
DEVELOPED COUNTRIES
DIMENSIONS
DOCUMENT TYPES
FEDERAL REGION X
INFORMATION
MECHANICS
MINING
NORTH AMERICA
NUMERICAL DATA
TESTING
USA
012031* - Coal
Lignite
& Peat- Underground Mining- Strata Mechanics & Control- (1987-)