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Sand mining

Sand mining is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Sand mining rather than just read about it. In short: Sand mining is the extraction of sand, mainly through an open pit (or sand pit) but sometimes mined from beaches and inland dunes or dredged from ocean and river beds. Sand is often used in manufacturing, for example as an abrasive or in concrete.

Sand mining — main illustration
Sand mining — illustration

Key takeaways

  • Sand mining belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Sand mining to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Sand mining from memory before moving on to harder problems.

Reference excerpt

Sand mining is the extraction of sand, mainly through an open pit (or sand pit) but sometimes mined from beaches and inland dunes or dredged from ocean and river beds. Sand is often used in manufacturing, for example as an abrasive or in concrete. It is also used on icy and snowy roads usually mixed with salt, to lower the melting point temperature, on the road surface. Sand can replace eroded coastline. Some uses require higher purity than others; for example sand used in concrete must be free of seashell fragments. Sand mining presents opportunities to extract rutile, ilmenite, and zircon, which contain the industrially useful elements titanium and zirconium. Besides these minerals, beach sand may also contain garnet, leucoxene, sillimanite, and monazite. These minerals are quite often found in ordinary sand deposits. A process known as elutriation is used, whereby flowing water separates the grains based on their size, shape, and density. Sand mining is a direct cause of erosion, and impacts the local wildlife. Various animals depend on sandy beaches for nesting clutches, and mining has led to the near extinction of gharials (a species of crocodilian) in India. Disturbance of underwater and coastal sand causes turbidity in the water, which is harmful for organisms like coral that need sunlight. It can also destroy fisheries, financially harming their operators. Removal of physical coastal barriers, such as dunes, sometimes leads to flooding of beachside communities, and the destruction of picturesque beaches causes tourism to dissipate. Sand mining is regulated by law in many places, but is often done illegally. Globally, it is a $70 billion industry, with sand selling at up to $90 per cubic yard.

By country

Australia

In the 1940 mining operations began on the Kurnell Peninsula (Captain Cook's landing place in Australia) to supply the expanding Sydney building market. It continued until 1990 with an estimate of over 70 million tonnes of sand having been removed. The sand has been valued for many decades by the building industry, mainly because of its high crushed shell content and lack of organic matter, it has provided a cheap source of sand for most of Sydney since sand mining operations began. The site has now been reduced to a few remnant dunes and deep water-filled pits which are now being filled with demolition waste from Sydney's building sites. Removal of the sand has significantly weakened the peninsula's capacity to resist storms. Ocean waves pounding against the reduced Kurnell dune system have threatened to break through to Botany Bay, especially during the storms of May and June back in 1974 and of August 1998. Sand Mining also takes place in the Stockton sand dunes north of Newcastle and in the Broken Hill region in the far west of the state.

A large and long-running sand mine in Queensland, Australia (on North Stradbroke Island) provides a case study in the environmental consequences on a fragile sandy-soil based ecosystem, justified by the provision of low wage casual labor on an island with few other work options. The Labor state government pledged to end sand mining by 2025, but this decision was overturned by the LNP government which succeeded it. This decision has been subject to an allegation of corrupt conduct. From the 1850s to the early 20th century, sand was mined from the tall, cliff-like banks of the Maribyrnong River, in what is now suburban Melbourne. The Maribyrnong Sand Company was set up in the early 20th century to transport the sand by barge downriver to the industrial areas of Footscray and Yarraville, for use in the production of glass, concrete and ceramics. Sand mining contributes to the construction of buildings and development. The negative effects of sand mining include the permanent loss of sand in areas, as well as major habitat destruction.

India

Sand mining is an environmental problem in India. Environmentalists have raised public awareness of illegal sand mining in the states of Maharashtra, Madhya Pradesh, Andhra Pradesh, Tamil Nadu and Goa. Conservation and environmental NGO Awaaz Foundation filed a public interest litigation in the Bombay High Court seeking a ban on mining activities along the Konkan coast. Awaaz Foundation, in partnership with the Bombay Natural History Society also presented the issue of sand mining as a major international threat to coastal biodiversity at the Conference of Parties 11, Convention on Biological Diversity, Hyderabad in October 2012. D. K. Ravi, an Indian Administrative Service officer of the Karnataka state, who was well known for his tough crackdown on the rampant illegal sand mining in the Kolar district, was found dead at his residence in Bengaluru, on 16 March 2015. It is widely alleged that the death was not due to suicide but caused by the mafia involved in land grabbing and sand mining.

New Zealand

Sand mining occurs in the Kaipara Harbour, off the coast at Pakiri and offshore from Little Barrier Island. A sand mine had operated at Whiritoa on the east coast of the North Island for 50 years extracting 180,000m3 of sand. Coastal sand mines currently operate at Maioro and Taharoa to recover iron sand. When an application was lodged in 2005 to mine iron sands on the seabed of the coast of Raglan local residents organised in opposition to the scheme. The application for the mining was turned down by Crown Minerals due to a lack of technical detail. A proposal to begin sand mining in Bream Bay was among 149 initiatives invited to apply for resource consent in a streamlined process under the Fast-track Approvals Act 2024, an inclusion which drew widespread opposition amongst the local community.

Sierra Leone Activists and local villagers have protested against sand mining on Sierra Leone's Western Area Peninsula. The activity is contributing to Sierra Leone's coastal erosion, which is proceeding at up to 6 meters a year.

United States The current size of the sand mining market in the United States is slightly over a billion dollars per year. The industry has been growing by nearly 10% annually since 2005 because of its use in hydrocarbon extraction. The majority of the market size for mining is held by Texas and Illinois.

Wisconsin, Minnesota, Illinois, Indiana, Iowa and Florida

… excerpt ends here. Continue reading the full article.

Illustrations

Sand mining: Sand pit along the Mississippi River, United States
Sand pit along the Mississippi River, United States
Sand mining: Artificial lake with frac sand dredger
Artificial lake with frac sand dredger
Sand mining: Sand being loaded onto a barge on the Maribyrnong River, Essendon West, around 1910
Sand being loaded onto a barge on the Maribyrnong River, Essendon West, around 1910
Sand mining: Frac sand facility in Blair, Wisconsin
Frac sand facility in Blair, Wisconsin
Sand mining: Frac sand mine in the Town of Oakdale, Wisconsin with a large looped track with 3 rail lines
Frac sand mine in the Town of Oakdale, Wisconsin with a large looped track with 3 rail lines

Worked examples

Example 1 — a first encounter with Sand mining

Start with the simplest possible case. Write down what Sand mining claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Sand mining before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Sand mining ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Sand mining

In research
Sand mining appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Sand mining in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Sand mining is common in secondary-school and first-year university syllabi. It links to neighbouring topics Environmental impact of mining, Sand, Sand mining, so understanding it makes those chapters shorter.
In everyday life
Look for Sand mining outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Sand mining in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Sand mining means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Sand mining out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sand mining in simple terms?

Sand mining is the extraction of sand, mainly through an open pit (or sand pit) but sometimes mined from beaches and inland dunes or dredged from ocean and river beds. Sand is often used in manufacturing, for example as an abrasive or in concrete.

Why does Sand mining matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Sand mining?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Sand mining.

Tags

  • Environmental impact of mining
  • Sand
  • Sand mining
  • Surface mining

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