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Tailings and Mine Waste Conference
Characterization and selection of waste rock borrow material for use as rock armor to reduce tailing impoundment side-slope erosion Milczarek, Michael; Keller, Jason; Hawthorne, Tim; Rogers, Scott; Litle, Robert; Klempel, Tom; Rice, Robert C.; Grabau, Matthew; Buchanan, Margaret
Abstract
A waste rock characterization effort was designed and implemented to identify favorable waste rock borrow material for use as rock armor on a tailing impoundment side-slope reclamation project. The following criteria were applied: 1) sufficient volumes of material; 2) particle size distributions with greater than 50% of the material larger than 12.5-mm particle diameter; 3) acid-base accounting showing positive net neutralization potential; and 4) sufficient nutrient levels and minimal potentially phytotoxic elements to facilitate revegetation. In addition, a field-scale erosion test designed to simulate a 100-year, 24-hour storm event was conducted to determine the efficacy of the selected rock material and of selected ripping treatments in controlling erosion. Two generally non-acid generating and erosion resistant mine-waste rock types were found: argillite and arkose material. Within the potential source areas, evidence of oxidation (yellowish-red staining) was a good predictor of net acid -generating material and used as exclusion criteria. Argillite was used as rock armor on short slopes and the coarser arkose material for slope-lengths greater than 90-meters.[All papers were considered for technical and language appropriateness by the organizing committee.]
Item Metadata
Title |
Characterization and selection of waste rock borrow material for use as rock armor to reduce tailing impoundment side-slope erosion
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Creator | |
Contributor | |
Date Issued |
2011-11
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Description |
A waste rock characterization effort was designed and implemented to identify favorable waste rock borrow
material for use as rock armor on a tailing impoundment side-slope reclamation project. The following criteria
were applied: 1) sufficient volumes of material; 2) particle size distributions with greater than 50% of the
material larger than 12.5-mm particle diameter; 3) acid-base accounting showing positive net neutralization
potential; and 4) sufficient nutrient levels and minimal potentially phytotoxic elements to facilitate revegetation.
In addition, a field-scale erosion test designed to simulate a 100-year, 24-hour storm event was conducted to
determine the efficacy of the selected rock material and of selected ripping treatments in controlling erosion.
Two generally non-acid generating and erosion resistant mine-waste rock types were found: argillite and arkose
material. Within the potential source areas, evidence of oxidation (yellowish-red staining) was a good predictor
of net acid -generating material and used as exclusion criteria. Argillite was used as rock armor on short slopes
and the coarser arkose material for slope-lengths greater than 90-meters.[All papers were considered for technical and language appropriateness by the organizing committee.]
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Genre | |
Type | |
Language |
eng
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Date Available |
2011-11-03
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Provider |
Vancouver : University of British Columbia Library
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Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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DOI |
10.14288/1.0107746
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URI | |
Affiliation | |
Peer Review Status |
Unreviewed
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Scholarly Level |
Other
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Rights URI | |
Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International