JNTU
JNTU B.Tech III SURFACE MINING TECHNOLOGY Previous Question Paper (November/December - 2017 - R13)
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
Part A
What is limiting stripping ratio?
Answer
The Limiting Stripping Ratio (LSR) is the maximum allowable ratio of the volume of overburden to be removed to the quantity of mineral recovered, beyond which the surface mining operation becomes economically unviable.
What are the factors influence the location of box cut?
Answer
- Topography and surface gradient of the area.
- Geological structure and dip of the ore body.
- Availability of space for initial overburden dumping.
- Proximity to infrastructure and haulage routes.
What is Grubbing?
Answer
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The capacity of the Dozer is 15 m3 and it is handling a loose soil of swell factor 1.1 with an efficiency of 75%, what is the output of the dozer if it takes 10 minutes to complete one cycle?
Answer
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What is swinging of a shovel?
Answer
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What are the conditions influence the selection of Bucket wheel excavators?
Answer
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What are the different types of dumps?
Answer
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List the factors which govern rock slope stability?
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How water is polluted due to surface mining
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What are the steps to be taken to protect top soil?
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Part B
Discuss the status of surface mining of coal in India vis-à-vis production and productivity.
Answer
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Discuss about the Preliminary evaluation of surface mining prospects.
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What is scarification?
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What are the different equipment available for scarification?
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Explain the principle and operation of wheel mounted rippers.
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Estimate the number of drills required for 8 million tonnes of coal production per a year. The stripping ratio of the mine 1 in 8.
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Explain about overcastting by Draglines.
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Explain the principle and operation of Bucket Wheel Excavator.
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Explain about design of benches in overburden and coal with an example.
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Give the organization structure for an opencast mine producing 15 million tones of coal per year.
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Describe the different Environmental problems due to surface mining.
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Explain the remedial measures to control environmental degradation due to surface mining.
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Explain about the Environmental Management Plan.
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