Tailings dams are structures built to store waste materials from mining operations. They are among the largest human-made structures and must be designed to safely contain tailings over the long term. Uranium and iron mining produce large volumes of tailings that contain heavy metals and radioactivity. Tailings dams use various designs like downstream, centerline, and upstream to gradually increase dam height as more tailings are added. Failures can cause environmental damage by contaminating water and releasing toxic substances. Proper engineering design, construction, monitoring, and remediation are needed to prevent failures and ensure tailings dams operate safely.
This presentation reviews tailings dams and the hazardous waste contained within them. Basic design and the consequenses of design failure will also be reviewed.
Mine wastes are problematic because they contain hazardous substances that can be (or are) released into the environment around the Sukari gold mine – heavy metals, metalloids, acids, process chemicals – and therefore require treatment, secure disposal, and monitoring.
Wastes are not only produced during mining, but also at mineral processing plants and smelter sites and include effluents, sludges, leached ore residues, slags, furnace dusts, filter cakes and smelting residues.
Mine wastes may be in the form of: solid waste, water waste, or gaseous waste.
Environmental contamination and pollution as a result of improper mining, smelting and waste disposal practices has occurred, and still occur at Sukari Gold Mine. Sukari Tailings Storage Facilities” (TSF)
Wastewater treatment is a process used to remove contaminants from wastewater and convert it into an effluent that can be returned to the water cycle. Once returned to the water cycle, the effluent creates an acceptable impact on the environment or is reused for various purposes (called water reclamation).
MINES WASTES; WASTE-ROCK DISPOSAL (ROCK DUMPS); WASTEWATER; TAILINGS & TAILINGS COMPOSITION; Tailings Solids; Tailings liquid; Tailings waters; Sulphidic mine wastes; Acid Mine Waters; TAILINGS DISPOSAL METHODS; Dynamic Simulation of a Tailing Storage Facility (TSF); Tailings Dam Styles (or Configurations); Fundamental Constructed Elements of a Tailings Dam; Water Balance of a Tailings Dams; Disposal Methods; THICKENED DISCHARGE AND PASTE DISPOSAL; IN-PITWASTE DISPOSAL; SEEPAGE FLOW TO SURFACE WATER AND GROUNDWATER; RIVERINE TAILINGS DISPOSAL; SUBMARINE TAILINGS DISPOSAL; Alternative Location To Tailing
This presentation reviews tailings dams and the hazardous waste contained within them. Basic design and the consequenses of design failure will also be reviewed.
Mine wastes are problematic because they contain hazardous substances that can be (or are) released into the environment around the Sukari gold mine – heavy metals, metalloids, acids, process chemicals – and therefore require treatment, secure disposal, and monitoring.
Wastes are not only produced during mining, but also at mineral processing plants and smelter sites and include effluents, sludges, leached ore residues, slags, furnace dusts, filter cakes and smelting residues.
Mine wastes may be in the form of: solid waste, water waste, or gaseous waste.
Environmental contamination and pollution as a result of improper mining, smelting and waste disposal practices has occurred, and still occur at Sukari Gold Mine. Sukari Tailings Storage Facilities” (TSF)
Wastewater treatment is a process used to remove contaminants from wastewater and convert it into an effluent that can be returned to the water cycle. Once returned to the water cycle, the effluent creates an acceptable impact on the environment or is reused for various purposes (called water reclamation).
MINES WASTES; WASTE-ROCK DISPOSAL (ROCK DUMPS); WASTEWATER; TAILINGS & TAILINGS COMPOSITION; Tailings Solids; Tailings liquid; Tailings waters; Sulphidic mine wastes; Acid Mine Waters; TAILINGS DISPOSAL METHODS; Dynamic Simulation of a Tailing Storage Facility (TSF); Tailings Dam Styles (or Configurations); Fundamental Constructed Elements of a Tailings Dam; Water Balance of a Tailings Dams; Disposal Methods; THICKENED DISCHARGE AND PASTE DISPOSAL; IN-PITWASTE DISPOSAL; SEEPAGE FLOW TO SURFACE WATER AND GROUNDWATER; RIVERINE TAILINGS DISPOSAL; SUBMARINE TAILINGS DISPOSAL; Alternative Location To Tailing
Why Mining is an Environmental Evil.pptxNeutralWeeb
A presentation on how mining proves to be hazardous for our natural as well as human resources. In this presentation we explain underground mining, open pit mining etc with various case studies supporting the data.
AN EFFORT BY RACHIT ARORA. Water is an essential part of our life. WE should save water until we have some cheap mechanism that will convert seawater into pure water.
"Understanding the Carbon Cycle: Processes, Human Impacts, and Strategies for...MMariSelvam4
The carbon cycle is a critical component of Earth's environmental system, governing the movement and transformation of carbon through various reservoirs, including the atmosphere, oceans, soil, and living organisms. This complex cycle involves several key processes such as photosynthesis, respiration, decomposition, and carbon sequestration, each contributing to the regulation of carbon levels on the planet.
Human activities, particularly fossil fuel combustion and deforestation, have significantly altered the natural carbon cycle, leading to increased atmospheric carbon dioxide concentrations and driving climate change. Understanding the intricacies of the carbon cycle is essential for assessing the impacts of these changes and developing effective mitigation strategies.
By studying the carbon cycle, scientists can identify carbon sources and sinks, measure carbon fluxes, and predict future trends. This knowledge is crucial for crafting policies aimed at reducing carbon emissions, enhancing carbon storage, and promoting sustainable practices. The carbon cycle's interplay with climate systems, ecosystems, and human activities underscores its importance in maintaining a stable and healthy planet.
In-depth exploration of the carbon cycle reveals the delicate balance required to sustain life and the urgent need to address anthropogenic influences. Through research, education, and policy, we can work towards restoring equilibrium in the carbon cycle and ensuring a sustainable future for generations to come.
Why Mining is an Environmental Evil.pptxNeutralWeeb
A presentation on how mining proves to be hazardous for our natural as well as human resources. In this presentation we explain underground mining, open pit mining etc with various case studies supporting the data.
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The carbon cycle is a critical component of Earth's environmental system, governing the movement and transformation of carbon through various reservoirs, including the atmosphere, oceans, soil, and living organisms. This complex cycle involves several key processes such as photosynthesis, respiration, decomposition, and carbon sequestration, each contributing to the regulation of carbon levels on the planet.
Human activities, particularly fossil fuel combustion and deforestation, have significantly altered the natural carbon cycle, leading to increased atmospheric carbon dioxide concentrations and driving climate change. Understanding the intricacies of the carbon cycle is essential for assessing the impacts of these changes and developing effective mitigation strategies.
By studying the carbon cycle, scientists can identify carbon sources and sinks, measure carbon fluxes, and predict future trends. This knowledge is crucial for crafting policies aimed at reducing carbon emissions, enhancing carbon storage, and promoting sustainable practices. The carbon cycle's interplay with climate systems, ecosystems, and human activities underscores its importance in maintaining a stable and healthy planet.
In-depth exploration of the carbon cycle reveals the delicate balance required to sustain life and the urgent need to address anthropogenic influences. Through research, education, and policy, we can work towards restoring equilibrium in the carbon cycle and ensuring a sustainable future for generations to come.
Willie Nelson Net Worth: A Journey Through Music, Movies, and Business Venturesgreendigital
Willie Nelson is a name that resonates within the world of music and entertainment. Known for his unique voice, and masterful guitar skills. and an extraordinary career spanning several decades. Nelson has become a legend in the country music scene. But, his influence extends far beyond the realm of music. with ventures in acting, writing, activism, and business. This comprehensive article delves into Willie Nelson net worth. exploring the various facets of his career that have contributed to his large fortune.
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Introduction
Willie Nelson net worth is a testament to his enduring influence and success in many fields. Born on April 29, 1933, in Abbott, Texas. Nelson's journey from a humble beginning to becoming one of the most iconic figures in American music is nothing short of inspirational. His net worth, which estimated to be around $25 million as of 2024. reflects a career that is as diverse as it is prolific.
Early Life and Musical Beginnings
Humble Origins
Willie Hugh Nelson was born during the Great Depression. a time of significant economic hardship in the United States. Raised by his grandparents. Nelson found solace and inspiration in music from an early age. His grandmother taught him to play the guitar. setting the stage for what would become an illustrious career.
First Steps in Music
Nelson's initial foray into the music industry was fraught with challenges. He moved to Nashville, Tennessee, to pursue his dreams, but success did not come . Working as a songwriter, Nelson penned hits for other artists. which helped him gain a foothold in the competitive music scene. His songwriting skills contributed to his early earnings. laying the foundation for his net worth.
Rise to Stardom
Breakthrough Albums
The 1970s marked a turning point in Willie Nelson's career. His albums "Shotgun Willie" (1973), "Red Headed Stranger" (1975). and "Stardust" (1978) received critical acclaim and commercial success. These albums not only solidified his position in the country music genre. but also introduced his music to a broader audience. The success of these albums played a crucial role in boosting Willie Nelson net worth.
Iconic Songs
Willie Nelson net worth is also attributed to his extensive catalog of hit songs. Tracks like "Blue Eyes Crying in the Rain," "On the Road Again," and "Always on My Mind" have become timeless classics. These songs have not only earned Nelson large royalties but have also ensured his continued relevance in the music industry.
Acting and Film Career
Hollywood Ventures
In addition to his music career, Willie Nelson has also made a mark in Hollywood. His distinctive personality and on-screen presence have landed him roles in several films and television shows. Notable appearances include roles in "The Electric Horseman" (1979), "Honeysuckle Rose" (1980), and "Barbarosa" (1982). These acting gigs have added a significant amount to Willie Nelson net worth.
Television Appearances
Nelson's char
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WRI’s brand new “Food Service Playbook for Promoting Sustainable Food Choices” gives food service operators the very latest strategies for creating dining environments that empower consumers to choose sustainable, plant-rich dishes. This research builds off our first guide for food service, now with industry experience and insights from nearly 350 academic trials.
Artificial Reefs by Kuddle Life Foundation - May 2024punit537210
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One of the key areas we work in is Artificial Reefs. This presentation captures our journey so far and our learnings. We hope you get as excited about marine conservation and artificial reefs as we are.
Please visit our website: https://kuddlelife.org
Our Instagram channel:
@kuddlelifefoundation
Our Linkedin Page:
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1. Design of Tailing
Dams In Iron And
Uranium Mines
Presented by
ABHISEK MAHALIK
120MN0550
SURFACE MINE
ENVIRONMENTAL ENGINEERING
2. Worldwide Waste Problem
• Disposal of waste in a crowded world is
becoming more and more of a problem
• Even domestic waste in developed
countries presents complicated disposal
issues as we have seen from previous
landfill presentations
3. What are Tailings Dams?
Mining is the extraction of minerals and
metals from earth. Manganese, tantalum,
cassiterite, copper, tin, nickel, bauxite
(aluminum ore), iron ore, gold, silver, and
diamonds are just some examples of what is
mined.
Tailings are the waste product of mining and
consists of ground rock and process
effluents that are generated in a mine
processing plant.
Tailings Dams are among the largest
manmade structures on Earth!
4. Uranium mining and mill tailing
Traditional uranium mining generates fine sandy tailings that contain virtually all the naturally
occurring radioactive elements found in uranium ore. These are collected in engineered tailings
dams and finally covered with a layer of clay and rock to inhibit the leakage of radon gas and
ensure their long-term stability. Over the short term, the tailings material often is covered with
water. After a few months, the tailings material contains about 75% of the radioactivity of the
original ore; these are not classified as radioactive wastes. Uranium tailings are waste by-product
materials left over from processing uranium-bearing ore. Uranium mill tailings also contain heavy
metals, such as lead and arsenic. Large mounds of uranium mill tailings have been left at many old
mining sites, and so remain a potential radiological and toxic metal hazard mainly due to the
solubilization of 226Ra, As, and Pb from ore minerals
5. Mining Waste
• Due to the nature of mining and mineral
processing the volumes of wastes from
mining operations are significantly larger
than BOTH domestic and industrial
wastes.
• Around the banks of a tailing lake in
China - seven square miles of toxic
waste shows the extent of this industry's
impact.
• 9,600 to 12,000 cubic meters of waste
gas—containing dust concentrate,
hydrofluoric acid, sulfur dioxide, and
sulfuric acid—are released with every
ton of rare metals that are mined.
• Approximately 75 cubic meters of acidic
wastewater, plus about a ton of
radioactive waste residue are also
produced.
*Vegetation appears red, grassland light is brown,
rocks are black, and water surfaces are green.
6. Structure of Tailings Dams
Tailings Dams must provide safe and permanent storage of tailings material. This is
achieved by designing tailings embankments to withstand any potential catastrophic
event – such as an earthquake or flood – and by controlling the seepage of tailings
water.
Unlike water dams, tailings embankments are made of rock and sand, and have a
very wide base. As the volume of tailings material contained in the storage area
grows, so must the height of the tailings embankment and the elevation of the
tailings pipeline.
Another concern for tailings management relates to the dispersal of tailings dust.
This dispersal can be prevented by keeping the tailings material saturated at all
times.
7. Factors affecting Tailings Dam Stability
Foundation stability
Height and angle of outer slope
Rate of disposition and detailed properties of tailings
Seismic influences
Control of hydrology (drainage system)
8. Basic Designs for Tailings Dams
A. Downstream
• successive raising of the embankment
that positions the fill and crest further
downstream.
B. Centerline
• tailings from the embankment crest form
a beach behind the dam wall. When
subsequent raising is required, material
is placed on both the tailings and the
existing embankment.
C. Upstream
• starts with a pervious (free draining)
starter dyke foundation. The tailings are
usually discharged from the top of the
dam crest creating a beach that becomes
the foundation for future embankment
raises
9. Flambeau impoundment
Figure 16.8 shows a generalized representation of water gain and loss at a tailings impoundment
(Down and Stocks, 1977b). With the exception of precipitation and evaporation, the rates and
volumes of the water can be controlled to a large extent. It is more satisfactory to attempt to
prevent the contamination of natural waters rather than to treat them afterwards, and if surface run-
off to the dam is substantial, then interception ditches should be installed. It is difficult to quantify
the amount of water lost to groundwater, but this can be minimized by selecting a site with
impervious foundations, or by sealing with an artificial layer of clay.
Figure 16.7. Flambeau impoundment
10. The tailings are often treated with lime to neutralize acids and precipitate heavy metals as insoluble
hydroxides before pumping to the dam. Such treated tailings may be thickened, and the overflow,
free of heavy metals, returned to the mill (Figure 16.9), thus reducing the water and pollutant input
to the tailings dam.
Assuming good control of the above inputs and outputs of dam water, the most important factor in
achieving pollution control is the method used to remove surplus water from the dam. Decant
facilities are required on all dams to allow excess free water to be removed. Inadequate decant
design has caused major dam failures.
Figure 16.9. Treatment of tailings with lime
11. Environmental impacts associated with tailings dam failures
Other than the possible heavy loss of life and economic losses, environmental damaging impacts associated with
structural failures in dams include:
• damage or destruction of valuable habitats and ecosystems;
• release of effluent from an impoundment may contaminate surface water
• generation and release of acid mine drainage may occur
• seepage of effluent throughout the base of the structure may contaminate groundwater
• dried tailings may be swept as dust by strong winds into neighboring habitations or ecosystems
• effluent in tailings impoundments may generate toxic gases that may poison birds attracted by water in dry
regions
13. Timely Remedial Action
• Timely action when warning signs first
appear can prevent costly and
sometimes fatal consequences
• Responsibility is left to the owner or
operator of the dam but there is no
substitute for a competent engineer in
the construction process
• Regular inspection is a must
14. Conclusion
There was a lack of design ability, poor construction, poo operation/closur o a
combination in each and every case history
If basic design and construction requirements are ignore a tailings dams opportunity
as a FAILURE is imminent
Quotes from dam operators after failures:
“A well intentioned corporation employing apparently well-qualified consultants I not adequate
insurance against serious incidents.” (Morgentsern, 1998 after the Spain Dam Failure.)
“Any attempt at construction o a tailings dam that does no ake into account the design-construct
process is in my opinion doomed to great distress.” (D’Appolonia, 1976, after the Virginia disaster)