science

Rajpura Dariba Mine VRM disaster

Rajpura Dariba Mine VRM disaster 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 Rajpura Dariba Mine VRM disaster rather than just read about it. In short: The Rajpura Dariba Mine VRM disaster took place in Dariba, Udaipur, India on 28 August 1994 at a mine operated by Hindustan Zinc Ltd. History The slurry from a VRM stope where cemented fill could not settle broke through the plug made below the stope.

Key takeaways

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

Reference excerpt

The Rajpura Dariba Mine VRM disaster took place in Dariba, Udaipur, India on 28 August 1994 at a mine operated by Hindustan Zinc Ltd.

History The slurry from a VRM stope where cemented fill could not settle broke through the plug made below the stope. The shaft was undergoing a second phase of deepening. A plug was placed in the shaft to separate the old operating portion from the new construction. The slurry got stuck over this shaft plug. Material accumulated for until the weight overwhelmed the plug. The accumulated material flowed through the haulage level and took the shortest path via the main shaft into the mine. All 13 miners in the mine drowned.

Stope A stope of about 50 meters horizontal length X 25 to 50 meters width X 50 meters vertical depth was excavated. This stope area was drilled completely from the top of stope throughout its height of 50 meter using long drill hole machines. At the bottom of the stope sufficient area is cleared to draw out muck. The stope is blasted in slices of about 5 meter or so using explosives. Blasted muck is withdrawn using an LHD machine. After blasting, a barricade plug is placed at the bottom of the stope from which muck is withdrawn. This barricade plug has a draw out pipe fitted at the bottom with a V notch for proper decantation and monitoring. This empty stope is now equipped with long decantation pipes to be lowered from the top of the stopes. The empty stope is filled with cement fill. Water is drained from the bottom of the stope, and the fill gradually solidifies.

Possible cause The collapse was clearly due to non-solidification. Decantation is the first step for proper solidification. 8000 m3 of material with maximum head of 50 meter remaining in slurry form for days together indicate lack of decantation, which can be due to deficient installation of decantation equipment and/or monitoring system. 15 stopes had already been filled successfully, indicating sufficient experience and reliability of method and equipment used. Nobody noticed that 50 meter of filling slurry head had been created inside the stope over days/months. Lack of notifications of non solidification points toward an inadequate alarm system.

See also National Geographic Seconds From Disaster episodes

References

Worked examples

Example 1 — a first encounter with Rajpura Dariba Mine VRM disaster

Start with the simplest possible case. Write down what Rajpura Dariba Mine VRM disaster 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 Rajpura Dariba Mine VRM disaster 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 Rajpura Dariba Mine VRM disaster 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 Rajpura Dariba Mine VRM disaster

In research: Rajpura Dariba Mine VRM disaster 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 Rajpura Dariba Mine VRM disaster 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: Rajpura Dariba Mine VRM disaster is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1990s in Rajasthan, 1994 disasters in India, 1994 mining disasters, so understanding it makes those chapters shorter.
In everyday life: Look for Rajpura Dariba Mine VRM disaster 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 Rajpura Dariba Mine VRM disaster in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Rajpura Dariba Mine VRM disaster means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Rajpura Dariba Mine VRM disaster out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Rajpura Dariba Mine VRM disaster in simple terms?

The Rajpura Dariba Mine VRM disaster took place in Dariba, Udaipur, India on 28 August 1994 at a mine operated by Hindustan Zinc Ltd. History The slurry from a VRM stope where cemented fill could not settle broke through the plug made below the stope.

Why does Rajpura Dariba Mine VRM disaster 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 Rajpura Dariba Mine VRM disaster?

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 Rajpura Dariba Mine VRM disaster.