Predicting flow characteristics of a lixiviant in a fractured crystalline rock mass
Book
·
OSTI ID:6243703
In situ metals research to characterize the hydrology of a fractured crystalline rock mass in underground mine stopes is discussed. The objective of this study was to find the potential direction, velocity, and concentrations of a lixiviant plume, should leaching solvents (lixiviants) escape from a test slope. The study was conducted by the US Bureau of Mines at the Colorado School of Mines Experimental Mine in Idaho Springs, CO. Since this was a method evaluation site, the lixiviant was simulated using water and acceptable tracers. The site is located in moderately fractured Precambrian migmatite-biotite gneisses of the Idaho Springs Formation. The data required for the characterization were obtained from geologic maps and reports, core logs, and air and water permeability tests. The acquired data were analyzed and applied to a computer model that calculated the characteristics of a lixiviant plume originating at the slope. A sensitivity analysis showed that dispersivity, ground water velocity, fracture porosity, and fracture spacing had notable effects on the concentration of the plume. Assuming a saturated rock mass, the lixiviant plume would disperse to undetectable levels in a very short time because of a high fracture density at the mine site.
- OSTI ID:
- 6243703
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
COLORADO
DEVELOPED COUNTRIES
DISPERSIONS
DISSOLUTION
ENVIRONMENTAL IMPACTS
ENVIRONMENTAL TRANSPORT
FLOW MODELS
GEOLOGIC AGES
GEOLOGIC FORMATIONS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
GNEISSES
GROUND WATER
HYDROGEN COMPOUNDS
HYDROLOGY
LEACHATES
LEACHING
MASS TRANSFER
MATHEMATICAL MODELS
METAMORPHIC ROCKS
MINING
MIXTURES
NATIONAL ORGANIZATIONS
NORTH AMERICA
OXYGEN COMPOUNDS
PLUMES
POLLUTION
PRECAMBRIAN ERA
ROCKS
SEPARATION PROCESSES
SITE CHARACTERIZATION
SOLUTIONS
SOLVENTS
UNDERGROUND MINING
US BUREAU OF MINES
US DOI
US ORGANIZATIONS
USA
WATER
WATER POLLUTION
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
COLORADO
DEVELOPED COUNTRIES
DISPERSIONS
DISSOLUTION
ENVIRONMENTAL IMPACTS
ENVIRONMENTAL TRANSPORT
FLOW MODELS
GEOLOGIC AGES
GEOLOGIC FORMATIONS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
GNEISSES
GROUND WATER
HYDROGEN COMPOUNDS
HYDROLOGY
LEACHATES
LEACHING
MASS TRANSFER
MATHEMATICAL MODELS
METAMORPHIC ROCKS
MINING
MIXTURES
NATIONAL ORGANIZATIONS
NORTH AMERICA
OXYGEN COMPOUNDS
PLUMES
POLLUTION
PRECAMBRIAN ERA
ROCKS
SEPARATION PROCESSES
SITE CHARACTERIZATION
SOLUTIONS
SOLVENTS
UNDERGROUND MINING
US BUREAU OF MINES
US DOI
US ORGANIZATIONS
USA
WATER
WATER POLLUTION