Download GTU BE/B.Tech 2018 Winter 5th Sem New 2152206 Underground Coal Mining Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 5th Sem New 2152206 Underground Coal Mining Previous Question Paper

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1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?V (NEW) EXAMINATION ? WINTER 2018
Subject Code:2152206 Date:27/11/2018

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) What do you mean by stratified deposit? Write in brief. 03
(b) What is stowing and write its merits and demerits. 04
(c) Explain: Origin of coal and theories of it.
:
07

Q.2 (a) Write down the advantages and disadvantages of longwall mining
methods.
03
(b) Describe bord and pillar method with its advantages and
disadvantages.
04
(c) Write the factors influencing on choice of mining methods. 07
OR
(c) Give a classification of underground coal mining with its brief
discussions of each.
07
Q.3 (a) Explain: size of pillar 03
(b) Write down the restrictions on development of mine. 04
(c) Explain the development of bord and pillar working using continuous
miner and coal cutting machine.
07
OR
Q.3 (a) Explain: size of panels 03
(b) Explain: Working of Continguous seams. 04
(c) Write down the principles of pillar extraction techniques with its
problems.
07
Q.4 (a) Explain: Variants of longwall face layouts. 03
(b) Explain: Length of longwall face. 04
(c) Which are the influenced factors for layout of longwall faces? 07
OR
Q.4 (a) Explain: Direction of face advance. 03
(b) Classification of Modern longwall faces. 04
(c) Elements of longwall face. 07
Q.5 (a) Explain: Principle of stowing. 03
(b) Describe: Hand packing stowing method. 04
(c) Describe a hydraulic stowing with its applicability and preparatory
arrangement via brief discussion.
07
OR

Q.5 (a) Explain: Hydraulic Profile 03
(b) Explain: Rate of stowing 04
(c) Draw a neat sketch of general arrangement of a sand stowing with its
brief discussion.
07
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