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Hydrogeological behaviour of an unsaturated waste rock pile: a case study at the Golden Sunlight Mine, Montana, USA
Abstract Parent geology, mining operation, construction practice and weathering processes govern the hydrogeological behaviour of waste rock piles. Variable heterogeneity in such earth structures requires site specific correlations. Based on field investigation and laboratory characterization, this paper developed a physical model for the unsaturated East Pile at the Golden Sunlight Mine in Montana, USA. Results indicate that the pile had interfingered dipping beds characterized by a matrix-supported structure in the fine grained layers and a clast-supported structure in the coarse grained layers. Waste rock with at least 45% sand retained water (ψa = 2–4 kPa, ψr = 20–40 kPa, ksat = 3.5 × $ 10^{−3} $ cm/s, kunsat = 2–3 orders of magnitude lower at 100 kPa) whereas materials with less than 45% sand drained rapidly (ψa < 1 kPa, ψr < 10 kPa, ksat = 1 × $ 10^{−1} $ cm/s, kunsat > 6 orders of magnitude lower at 10 kPa).
Hydrogeological behaviour of an unsaturated waste rock pile: a case study at the Golden Sunlight Mine, Montana, USA
Abstract Parent geology, mining operation, construction practice and weathering processes govern the hydrogeological behaviour of waste rock piles. Variable heterogeneity in such earth structures requires site specific correlations. Based on field investigation and laboratory characterization, this paper developed a physical model for the unsaturated East Pile at the Golden Sunlight Mine in Montana, USA. Results indicate that the pile had interfingered dipping beds characterized by a matrix-supported structure in the fine grained layers and a clast-supported structure in the coarse grained layers. Waste rock with at least 45% sand retained water (ψa = 2–4 kPa, ψr = 20–40 kPa, ksat = 3.5 × $ 10^{−3} $ cm/s, kunsat = 2–3 orders of magnitude lower at 100 kPa) whereas materials with less than 45% sand drained rapidly (ψa < 1 kPa, ψr < 10 kPa, ksat = 1 × $ 10^{−1} $ cm/s, kunsat > 6 orders of magnitude lower at 10 kPa).
Hydrogeological behaviour of an unsaturated waste rock pile: a case study at the Golden Sunlight Mine, Montana, USA
Azam, Shahid (author) / Wilson, G. Ward (author) / Herasymuik, Greg (author) / Nichol, Craig (author) / Barbour, Lee S. (author)
2006
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
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