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Use of Bituminous Geomembrane in Harsh Conditions
This paper presents two mining applications of bituminous geomembrane. At the Diavik Diamond Mine in the "Lac de Gras" area in the Northwest Territories of Canada, the diamonds are extracted from the Kimberlite ore, and the rejected material is permanently stored in a diked containment facility lined with a geomembrane. The initial stages of the embankment construction used HDPE geomembrane, which meant that geomembrane lining could not be done for many months of the year. The design was changed to bituminous geomembrane, which can be installed at very low temperature. This increased the construction period by several months each year. At the Furioso Mine in the Chilean Patagonia region, the waste rock pile was closed using a bituminous geomembrane covered with 20 cm of soil. The driver for liner selection was the ability to install the bituminous geomembrane in winds up to 50 km/h. Bituminous geomembranes have been successfully used at two sites with very harsh weather: extremely cold at the Diavik Diamond Mine in the Northwest Territory (Canada) and very windy and susceptible to quick changes in weather at the Furioso Mine in Chilean Patagonia. The use of bituminous geomembrane provided several benefits to the two mines namely: (1) The possibility to install the geomembrane in difficult weather conditions: liner can be efficiently installed at nearly any time of the year. Only when temperatures dip below -30 °C is liner installation not possible. (2) The installation does not require a specialty contractor so it offers employment opportunities for local workforces. The owner at Furioso mine was able used Patagonian residents whereas at Diavik first Nation People were employed. (3) Economically viable when balancing the initial higher capital cost with the facts the cushion geotextile are not needed, not using a specialty contractor provide full schedule flexibility, and coarser bedding and cover material can be used.
Use of Bituminous Geomembrane in Harsh Conditions
This paper presents two mining applications of bituminous geomembrane. At the Diavik Diamond Mine in the "Lac de Gras" area in the Northwest Territories of Canada, the diamonds are extracted from the Kimberlite ore, and the rejected material is permanently stored in a diked containment facility lined with a geomembrane. The initial stages of the embankment construction used HDPE geomembrane, which meant that geomembrane lining could not be done for many months of the year. The design was changed to bituminous geomembrane, which can be installed at very low temperature. This increased the construction period by several months each year. At the Furioso Mine in the Chilean Patagonia region, the waste rock pile was closed using a bituminous geomembrane covered with 20 cm of soil. The driver for liner selection was the ability to install the bituminous geomembrane in winds up to 50 km/h. Bituminous geomembranes have been successfully used at two sites with very harsh weather: extremely cold at the Diavik Diamond Mine in the Northwest Territory (Canada) and very windy and susceptible to quick changes in weather at the Furioso Mine in Chilean Patagonia. The use of bituminous geomembrane provided several benefits to the two mines namely: (1) The possibility to install the geomembrane in difficult weather conditions: liner can be efficiently installed at nearly any time of the year. Only when temperatures dip below -30 °C is liner installation not possible. (2) The installation does not require a specialty contractor so it offers employment opportunities for local workforces. The owner at Furioso mine was able used Patagonian residents whereas at Diavik first Nation People were employed. (3) Economically viable when balancing the initial higher capital cost with the facts the cushion geotextile are not needed, not using a specialty contractor provide full schedule flexibility, and coarser bedding and cover material can be used.
Use of Bituminous Geomembrane in Harsh Conditions
Breul, Bertrand (author) / Breul, Bernard (author)
2013
8 Seiten, Bilder, Tabellen
Conference paper
Storage medium
English
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