— Besser et al. studied the toxicity of sediments downstream of lead–zinc mining areas in southeast Missouri, using pore-water toxicity tests with the daphnid, ... Mining tailings pose a high potential risk due to poor water management, failure of the tailings disposal method applied, dam failure and natural disasters.

 — The total annual amount of lead–zinc tailings (LZTs) in China is projected to reach 500 million tons by 2020 [1]; however, the country's comprehensive usage rate is only ∼10% [2].Stacking many LZT wastes land resources and causes heavy metal pollution in the soil and water bodies around the mining area [1], [3].Tailing cementation backfilling …

The next section of this report provides an overview of the various methods used to dispose of mine tailings and the types of impoundments that are used. Section 3 describes the …

 — The improper stockpiling of lead/zinc mine tailings results in significant toxic impurities releasing, which threatens both the surrounding environment and human …

 — Taking a Lead-Zinc mine in Inner Mongolia as an example, this paper introduces the use of tailings backfill technology to solve the problems of surface subsidence due to mining activity, including the following contents: (1) investigation and three-dimensional modeling of underground goaf and surface subsidence area, (2) …

engineering design of tailings dams in other mining industry sectors, for both stability and environmental performance. For instance, experience gained with leach pad liners is being transferred to linings for tailings ponds, and the use of synthetic lining materials is growing (although use of liners is still far from being the industry norm).

The residues from the extraction of lead/zinc (Pb/Zn) ores of most Pb/Zn mines are permanently stored in tailings ponds, which require revegetation to reduce their environmental impact. This can only be done if the main constraints on plant establishment are evaluated. This can readily be done by fi …

 — On April 25, 1998, the tailings dam failure at the Los Frailes lead-zinc mine at Aznalcóllar near Seville, Spain, released several million cubic meters of toxic tailings slurries and liquid into the nearby Río Agrio, a tributary to Río Guadiamar, which covered several thousand hectares of farmland, and threatened the Doñana National Park.

 — Lead–zinc tailings are the typical solid wastes in mines with high yield and low utilization rates in some countries at present. They are mainly stockpiled in tailings reservoirs, occupying massive land …

The tailings are also very diverse in mineral phases even in the lead-zinc tailings. Figure 2 presents the XRD pattern of lead-zinc tailings coming from different resources. Previous research [] reveals that the mineral phases of the lead-zinc tailings include calcite, dolomite, quartz, kaolinite, galena, pyrite and gypsum, whereas other research [] exhibits that …

 — KOMPAS.com - A few hundred meters from the village of Sopokomil in northern Sumatra, Indonesia, work is set to begin on a tailings dam for a zinc mine that experts say is a recipe for disaster. The site …

 — In this scenario, recycling mine tailings can help reduce the number of tailings for disposal. Circular economy, recyclability, recycling, and reuse have been identified as emerging solutions that can drive the …

Los Frailes, Aznalcollar, Spain. Figure A: The almost sealed embankment that failed at Los Frailes. Introduction. Minas de Aznalcóllar is located near the town of Aznalcóllar in southwestern Spain and approximately 40 km west of the large city of Sevilla ().It is within the Iberian Pyrite Belt which has a well known mining district for at least a few millennia.

The Cause of the Failure. The 25-m-high dam rests on roughly 4 m of river-terrace alluvium (Figure 7), which is underlain by 70 m of blue marl (composed of roughly 25% carbonate).

two lead–zinc tailings (termed as YZB and SPC tailings) situated in the Qinling Mountains, Ningqiang county of Shaanxi Province, northwestern China as the research objects. The YZB and SPC tailings are derived from one lead–zinc mine, which has a mining history of 37 years. Before this work, the pollution level and microbial com-

 — Mine tailings can have a specific assemblage of plant species due to their unique physicochemical properties, and this process can be important in developing ecological theory and restoration practice. Physicochemical properties and natural colonization of plants on five lead/zinc (Pb/Zn) mine tailings in southern China were …

tailings dam failure of the Los Frailes lead-zinc mine at Aznalcóllar near Seville, Spain, released 4-5 million cubic meters of toxic tailings slurries and liquid into nearby Río …

 — Of the tailings dam incidents of lead ore mines, 65% (n = 11) cases corresponded to the upstream raise dam design. The downstream dam design was the second most common type, which was noticeable for copper, gold, silver, coal, and phosphorous ore mines. Although the centerline raise dam type was considered safer …

 — 1. Introduction. The lead-zinc mineral resources are indispensable in industrial development and economic growth [1, 2], which has been widely used in the electrical, metallurgical, and pharmaceutical industries [3].However, the environmental impacts of these resources' excavation and subsequent beneficiation have been ignored …

 — 1.1. What Are Mine Tailings? An Initial Scope in an Uncertainty and Complex World. The initial step in mineral processing involves crushing and grinding ore to produce a suitable particle size for further metallurgical processing using physical and chemical separation methods [].Physical separation processes take advantage of the …

 — To set the scene, we first describe the characteristics of tailings and of construction of tailings dams, and the common causes of their failure. We conclude with …

 — Boliden to expand Tara zinc mine's tailings dam in Ireland. ... The new deposits found at the mine exhibit inferred mineral resources that totals ten million tonnes, offering a zinc grade of 8.5% and a lead grade of 1.8%. Located at depths of 1,200m and 1,900m, the structure of the mineralisation is more complicated than earlier deposits. ...

 — Health & Safety: The mine site and associated tailings dam are located in an area that is one of the most active earthquake zones in the world. The site is approximately 14 kilometres from the Great Sumatran Fault. ... Pollution: Lead-zinc mines are among the most high-risk types of mine in terms of pollution, as the mining process produces ...

 — Imagine a big hole in the ground, similar to the one pictured above. Now imagine that pit filled with up to 10 billion tons of mining waste.

 — To analyze the pollution level and ecological risk of heavy metals in an abandoned lead–zinc mine tailings dam, this study first employed X-ray fluorescence analysis to determine the vertical ...

and ecological risk of heavy metals in an abandoned lead–zinc mine tailings dam, this study first employed X-ray fluorescence analysis to determine the vertical distribution patterns of heavy met-

 — Based on research carried out at 67 tailings dams in Spain: (1) tailings dams contain alternating sedimentary layers with contractive and dilative geomechanical behaviours; (2) tailings saturate quickly but drain more than 10 times slower due to the high-suction capacity of the porous sediments (2–300 MPa); and (3) over the long-term, a …

 — For example, catastrophic failure of the Buffalo Mine tailings dam in West ia, USA, resulted in the death of 125 people and more than 4000 people losing their homes in 1972 (Orendorff 2009). 3) ... Lead-zinc mine tailings have high contents of Pb and Zn while Cd and Ni contents are generally low. Copper tailings have a high concentration ...

The geotechnical properties of the mine tailings must be understood in order to construct more environmentally-friendly tailing ponds, and to further improve the efficiency of …

 — Dairi Prima Mineral is planning to build an underground mine to extract zinc, lead and silver ore that will create millions of cubic meters of toxic tailings in one of the world's highest earthquake risk zones in Sumatra. ... the remaining millions of cubic meters of toxic waste would be stored in a tailings dam that the company says will be ...