Download GTU BE/B.Tech 2019 Winter 5th Sem New 2152206 Underground Coal Mining Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 5th Sem New 2152206 Underground Coal Mining Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? V (New) EXAMINATION ? WINTER 2019
Subject Code: 2152206 Date: 25/11/2019

Subject Name: Underground coal Mining
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Explain: Longwall method of Mining. 03
(b) What is stratified deposit? List out its distribution in India. 04
(c) Explain in detail: (a) In-situ theory (b) Drift theory
:
07

Q.2 (a) List out various coal face machineries used for continuous bord and
pillar mining method with applicability.
03
(b) Explain the cycle of operation for longwall mining method. 04
(c) Explain with neat sketch coal cutting machine with its advantage
and disadvantages.
07
OR
(c) Explain with neat sketch side discharge loader with its selection
criteria.
07
Q.3 (a) Explain: Bord and Pillar with neat sketch 03
(b) Write down merits and demerits of bord and pillar against longwall
mining method.
04
(c) Explain the principles of pillar extraction techniques with its
problems with factors influenced on it.
07
OR
Q.3 (a) Explain: Factor of safety 03
(b) Explain: Size of panel and Size of pillar 04
(c) Explain the development of bord and pillar working using gathering
arm loaders and shuttle cars.
07
Q.4 (a) Write the advantages of powered supports. 03
(b) Explain: planning steps for longwall mining. 04
(c) Explain with neat sketch: SERDS with its merits and demerits. 07
OR
Q.4 (a) Compare the advantages of longwall advancing and longwall
retreating.
03
(b) What are the categories of powered supports? Explain in brief. 04
(c) Explain each elements of longwall face with a sketch. 07
Q.5 (a) Write a short note on preparatory arrangement for stowing. 03
(b) Write down merits and demerits of stowing. 04
(c) Explain with sketch (a) Hydraulic Profile (b) Rate of stowing 07
OR

Q.5 (a) Define stowing with their principle. 03
(b) Write note on pipe jam in hydraulic stowing. 04
(c) List out different stowing methods and explain any two with neat
sketch.
07
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