GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VIII (Old) EXAMINATION - WINTER 2019
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Subject Code: 182202 Date: 21/11/2019
Subject Name: Advance Mining Methods
Time: 02:30 PM TO 05:00 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) Explain the basic structure of powered supports with the help of neat labeled diagram. [07]
(b) List out different criterias for the selection of powered supports. [07]
Q.2 (a) List out the general considerations of horizon mining. Write its advantages and disadvantages. [07]
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(b) Explain the extraction of thin seam using coal plough in uni- and bi-direction. [07]OR
(b) Explain the advantages and disadvantages of thick seam mining. [07]
Q.3 (a) Listout different problems associated with thick seam mining. [07]
(b) Using a labeled layout describe horizontal slicing in both ascending and descending order. Also give its advantages and disadvantages. [07]
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OR
Q.3 (a) In what conditions sublevel caving can be used? Explain the working of this method along with its advantages and disadvantages. [07]
(b) Using a labeled layout describe inclined slicing. Also give its advantages and disadvantages. [07]
Q.4 (a) Explain different conditions suitable for hydraulic mining. [07]
(b) Using a neat layout explain the working of hydraulic mining. [07]
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OR
Q.4 (a) Explain the transportation arrangement used in hydraulic mining. [07]
(b) Give the advantages and disadvantages of hydraulic mining. [07]
Q.5 (a) List the favourable conditions for underground coal gasification. Also give its advantages and disadvantages. [07]
(b) Explain underground coal gassification method with its different phases. [07]
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OR
Q.5 (a) Explain deep-sea mining method of manganese nodules. [07]
(b) Name different ores that can be mined out by leaching process. Give an overview of mining by leaching and its advantages. [07]
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