What are sustainable design practices for tailings dams?
Sustainable design practices for tailings dams are described in the recent ICOLD Bulletin 139. The objectives of sustainable design are, upon completion of mining, resilient structures that are physically, chemically, ecologically and socially stable. In most cases, the dam and the impoundment are integrally connected.
What are the major considerations in the design of a tailings dam?
As noted previously, the major considerations in the design of a tailings dam and impoundment are stability, cost, and environmental performance.
What is 91 tailings dam?
4.8.1. Other Dam Type and Containment Considerations .......... 91 Tailings dam (also Tailings Management Facility (TMF) and Tailings Storage Facility (TSF)): an engineered structure, comprising the confining embankment and associated works, designed to contain tailings resulting from ore processing and to manage associated water.
How does a tailings dam work?
In most cases, the dam and the impoundment are integrally connected. All components of the TSF work together and a change in one of the components usually triggers changes throughout the system. Tailings dams have historically been categorized into three general classes (upstream, centreline and downstream), which are still relevant today.
What is a filtered tailings facility?
Typically, the filtered tailings form the containment structure (“structural zones”) and uncompacted tailings, which can have a lower solids content, can be placed in the interior. Facility seepage and runoff are collected and managed in external collection ponds. Figure 4.7 shows a schematic of a typical filtered tailings facility. 4.7.2.
What is the closure stage of a tailings facility?
Closure: the stage of the tailings facility after operations have ceased. Closure stages range from decommissioning to active closure, passive closure and facility relinquishment. Tailings are produced from the processing of mineral ores and are commonly stored within embankment dams.
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Tailings energy storage power stations primarily employ mechanisms like pumped hydro storage, which can be adapted to the mining environment. By utilizing the gravitational potential energy available in elevated tailings, these stations can efficiently convert kinetic energy into electrical power. 2.1 Pumped Hydro Storage
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A generic vanadium flow redox battery with an idealized power capacity storage model that allows to size energy and power independently has been selected in this context. 6.5.4 Pumped hydro storage In this case, a 245 kWh pumped hydro has been selected with a reservoir'' capacity of 1000 m 3 which can be discharged in 12 hours as shown in Table 11 .
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A hypothetical reclamation set-up consisting of an oil sands thickened tailings (OSTT) deposit capped by a sand layer was simulated under a range of initial tailings properties. The simulation results showed that soil water storage in the sand cap was highly sensitive to the initial solids contents of the underlying OSTT.
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In the last 20 years many mining projects around the world have applied a tailings deposition technology named "dry stacking of filtered tailings" at tailings storage facilities (TSFs). This technique produces an unsaturated cake that allows storing this material without the need to manage large slurry tailings ponds. The application of this technology has accomplished: (i) an …
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The beneficial post-closure options investigated were rainwater harvesting and electricity generation from wind power, photo voltaic solar power and a pump storage system constructed on the TSF.
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It notes that "Tailings management is often not a core skill in many mining organizations" (p. 125) and that tailings storage facility design studies submitted for regulatory approval "are often lacking in detail regarding the factors that need to be considered in assuring safety of the facility." (p. 126).
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Hydropower Plants | Pumped Storage Scheme Working Principle. The pumped storage scheme consists of a lower and upper dam between these two dams station is located. This also doubles the pumping during the emergency and peak demand. The water stored in upper dam is released large water ways flows through the turbines to generate electricity.
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In order to solve the problem of huge electricity demand in the tailings ecological restoration …
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storage in valleys, resulting in containment walls extending around an increasing proportion of the tailings storage perimeter as they are raised, making high facilities too costly. As a result, facility heights are limited, and tailings storage footprints grow ever larger. Source: After Williams 2017; adapted from Davies and Rice 2004
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