JNTU
JNTU B.Tech III UNDERGROUND MINING TECHNOLOGY Previous Question Paper (November/December - 2018 - R16)
Part A is compulsory (25 marks). Part B consists of 5 Units. Answer any one full question from each unit (10 marks each).
Part A
How many number of working faces available in a five heading development?
Answer
In a five-heading development system, there are 5 working faces available for production or development activities.
How the size of the barrier determined? What are the factors considered for it?
Answer
The size of a barrier is determined based on the depth of the seam, the strength of the strata, the width of the extraction panels, and the potential for water or gas inflow. Key factors include the compressive strength of the rock mass, the hydrostatic pressure, the depth of cover, and the factor of safety required to prevent structural failure or inundation.
What are the factors influence the layout of the drift?
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What are the draw backs of raising with 2 compartment methods?
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What is the importance of SSR?
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What are the factors influencing the choice of pillar extraction techniques?
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What are the disadvantages of cut and fill method?
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Give the classification of stoping methods.
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What is the importance of diagonal line of extraction?
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List the equipment used in Continuous Miner Technology for extraction of a 4.5m thick coal seam.
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Part B
What are the precautions to be taken while supporting with Roof Bolter in a Continuous Miner district?
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Explain the method of Board and Pillar development using LHDs, assume your own conditions.
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Explain the development of steeply dipping seams with a layout. Give the expected production per day. Assume your own conditions.
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Explain about the layout of drive, crosscuts and loading arrangements in development.
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What are the factors affecting the choice of level intervals?
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Explain Raising by long hole drilling.
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What is Depillaring?
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Explain the preparatory arrangements before depillaring with stowing.
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What are the conditions suitable for Blasting Gallery methods?
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Explain Blasting Gallery method operations – blasting, loading, supporting and induced blasting.
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Explain about sub level caving.
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What are the advantages of sub level caving?
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Explain the method of blasting in block caving.
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What are the explosives and initiating devices used in block caving method?
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Give the layout of a coal mine with one million tonnes of output (coal) per annum also state the machinery, manpower deployed, OMS per day. Assume your own conditions?
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What are the provisions in CMR while working multi-section and contiguous workings?
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What are the provision in CMR with regard to withdrawal of supports?
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