JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech II Year DEVELOPMENT OF MINERAL DEPOSITS Previous Question Paper (November/December - 2017 - R15)
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.
Part A
Which country has highest coal production in the world?
Answer
China is the country with the highest coal production in the world.
What is Longwall Mining?
Answer
Longwall mining is a highly productive underground coal mining method where a long wall of coal is mined in a single slice. The process involves a shearer or plow that moves back and forth across the coal face, cutting the coal and loading it onto a face conveyor.
Key components include:
- Powered Roof Supports: Hydraulic jacks that hold up the roof while the coal is being extracted and move forward as the face advances.
- Shearer: A machine equipped with rotating cutting drums that traverses the face.
- Armored Face Conveyor (AFC): A heavy-duty chain conveyor that transports the cut coal out of the face area.
As the equipment advances, the roof behind the supports is allowed to collapse in a controlled manner, a process known as caving, which relieves pressure on the face area.
What is fishing of bore hole?
Answer
Sign in to view the complete answer paper.
What is velocity of detonation?
Answer
Sign in to view the complete answer paper.
What are the different types of supports used at freshly exposed roof?
Answer
Sign in to view the complete answer paper.
What are the different types of steel props?
Answer
Sign in to view the complete answer paper.
What is Horizon mining?
Answer
Sign in to view the complete answer paper.
What are the factors affecting the size of the inset?
Answer
Sign in to view the complete answer paper.
How the shaft is ventilated during shaft sinking?
Answer
Sign in to view the complete answer paper.
What is the need of permanent lining?
Answer
Sign in to view the complete answer paper.
Part B
What is Rank of Coal?
Answer
Sign in to view the complete answer paper.
Explain about different Ranks of Coal.
Answer
Sign in to view the complete answer paper.
What are the different types of entries for opening of a coal seam by underground method?
Answer
Sign in to view the complete answer paper.
Explain the advantage of opening of a coal seam by shaft.
Answer
Sign in to view the complete answer paper.
What is horizontal drilling?
Answer
Sign in to view the complete answer paper.
Explain Percussive drilling.
Answer
Sign in to view the complete answer paper.
What is delay detonator?
Answer
Sign in to view the complete answer paper.
Explain about Emulsion Explosives.
Answer
Sign in to view the complete answer paper.
What are the characteristics of powered roof supports?
Answer
Sign in to view the complete answer paper.
Explain about the supporting of junction with roof bolts.
Answer
Sign in to view the complete answer paper.
What are the functions of a roof bolts?
Answer
Sign in to view the complete answer paper.
List and explain different types of roof bolts.
Answer
Sign in to view the complete answer paper.
Explain about the construction of pit bottom layout with a neat diagram.
Answer
Sign in to view the complete answer paper.
Explain about Drivage of drifts along with their organization and cycle of operations.
Answer
Sign in to view the complete answer paper.
Explain the different cycles of operation of shaft sinking.
Answer
Sign in to view the complete answer paper.
What are the conditions suitable for freezing methods?
Answer
Sign in to view the complete answer paper.
Explain cementation method of shaft sinking.
Answer
Sign in to view the complete answer paper.