At the active tailings impoundment Carén (surface 22 km) from the porphyry copper mine El Teniente, Chile, initial steps of primary mineral alteration and geochemical changes after deposition were studied. The tailings contained up to 3 vol% sulfides (mainly pyrite). At five points in the tailings impoundment, water samples up to a depth of 4 m were taken from piezometer. Preliminary data showe...

Pyrrhotite-bearing tailings were deposited in an impoundment at the Copper mine at Laver in Northern Sweden 1936-1946. Sulphide oxidation has released acidity and metals to the recipient since deposition. Sampling of surface water was performed in a brook draining the tailings impoundment in 1993, 2001 and 2004-05. The dissolved concentration of sulphide associated elements such as Cu, S and Zn...

The seepage field of tailings dam is closely related to the safety state. Real-time evaluation based on monitoring data great significance ensure safe operation pond. premise accurately evaluating status reliability data, and it necessary identify anomalies data. Because complex influence factors dam, traditional anomaly identification method regression model fails due its low fitting accuracy....

Abstract The massive annual tonnage of iron ore tailings, plus the more demanding environmental policies after catastrophic collapses Fundão Dam in 2015 and Feijão I 2019, have forced Brazilian mining companies to search for sustainable safer alternatives tailings disposal. industry has been studying dry stacking filtered tailings. Most seek development great stacks, over 200 m high, absorb who...

Once the flood overtopping accident of a reinforced tailings dam occurs, it will cause great property losses and serious environmental pollution to downstream residents. In order further study microscopic characteristics hydraulic erosion dams, considering that beginning particles is basis flooding in this paper, facility was used carry out particle start-up test with reinforcement spacing 5.0,...

The collapse of the Fundão tailings dam at Mariana (State of Minas Gerais, Brazil) started a huge human tragedy and likely the most serious environmental disaster in recent Brazilian history. The dam had contained waste from processing iron ore from mines owned by Samarco, a joint venture company of the Brazilian Vale S.A. and the Anglo-Australian BHP Billiton Ltd. Following ineffective attempt...

The friction performance and compression properties of geotextile bags under different degrees consolidation are researched through the slope sliding test, direct shear unconfined test in this study. made up tailings sands obtained from a construction site prototype dam Yunnan Province. is considered as an easy method to study with consolidation. Through coefficients between were obtained. Give...

The non-linear mechanical characteristics of tailings under high pressure are the research foundation large-scale dams. Considering stress caused by tailing ponds, consolidated drained triaxial shear tests were carried out. deterioration mechanism mechanics was revealed particle crushing. test results show that sample density has a great influence on volumetric strain low pressure. However, is ...