GTU BE/B.Tech 2018 Winter Question Papers || Gujarat Technological University
Subject Name: Underground Coal Mining
Time: 10:30 AM TO 01:00 PM Total Marks: 70
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-V (NEW) EXAMINATION - WINTER 2018
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Subject Code: 2152206 Date: 27/11/2018Subject Name: Underground Coal Mining
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| 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 Contiguous 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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