_REVISION - M1974052 ‎(14)‎

• Permit No: M1974052
• IBM Index Class Name: Revision
• Doc Name: SHAMROCK MINE LABORATORY EXPERIMENT
• Type & Sequence: TR1
• Media Type: D
• Archive: No

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Department of Civil Engineering
Groundwater-Environmental
Hydrogeology Program
Fort Collins,Colorado 80523 University
Fax:Fax:[phone]
SHAMROCK MINE
LABORATORY EXPERIMENT
INTRODUCTION
The laboratory experiment for the Shamrock Mine will be conducted by Co lorado State University,Department
of Civil Engineering, Ground Water - Environmental Hydrogeology Program. The experiment will be
conducted under the supervision of James Warner,Ground Water Program Leader. For reference telephone
number is(970)491-8381 and the email address is wamerna enar.colostate.edu.
The physical experiment to be conducted will model in the laboratory the injection of the ash-based grout mix
into the Shamrock Mine. The physical experiment will reproduce in the laboratory as close as possible the
same conditions that wilI occur in the field for the injection of the ash-based grout mix into the Shamrock Mine.
Both the short-term impacts(transient impacts occurring at the time of injection of the grout mix)and the long-
term impacts(steady state impacts)on the ground water will be measured in the laboratory from the injection
of the grout mix into the Shamrock mine.
CONCEPTUAL LABORATORY SETUP
Shown on the attached figure is a schematic of the flume(s)to be used in the laboratory to model the Shamrock
Mine. The flume will be constructed of plexiglass and will be approximately 6 feet in length,4 feet in height
and 6 inches in depth.Constant head reservoirs will be located at each end of the flume so as to be able to
control the flow rate. The flume will be filled with a medium/fine sand except for a hollow area which
represent the Shamrock Mine. The simulated mine will be approximately 3 feet in length,6 inches in height
and 6 inches in depth.One inch vertical access tubes will be installed into the mine. Through these access tubes
the grout mix will be injected into the hollow space in the flume representingthe mine. Actual water from the
Shamrock Mine will be used in the laboratory experiments.
Access taps will be installed into the side walls of the flume for the extraction of water for chemical analysis.
During the injection of the grout mix into the simulated mine,water for chemical analysis will be collected from
the mine area through these access taps. In this manner the short term transient impacts will be measured.
The physical experiment will be conducted for a total time period of about 60 days. During this time period,
water samples will be periodically collected for chemical analysis through side wall access taps from the sand
surrounding the mine.Water samples for chemical analysis will be collected at the end of 7 days,30 days and
60 days.
Laboratory Experiment Colorado State University
Shamrock Mine I-