Download GTU BE/B.Tech 2019 Winter 8th Sem New 2182202 Advance Mining Methods Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VIII (New) EXAMINATION — WINTER 2019

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Subject Code: 2182202 Date: 29/11/2019
Subject Name: Advance Mining Methods
Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Write the factors affecting the design of powered supports system. 03
(b) Explain the functions of power support system. 04

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(c) Explain horizon mining with its features. State its advantages and disadvantages. 07

Q.2 (a) Write the conditions suitable for the application of horizon mining. 03
(b) What are the problems in mining of thick coal seams? 04
(c) What are the main components of powered supports system? Explain Chock-Shield support with neat sketch. 07
OR

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(c) What are the planning considerations in horizon mining system? Explain briefly. 07

Q.3 (a) What do you understand by slice mining? 03
(b) Write the applicability conditions of inclined slicing with caving in descending order and inclined slicing with filling in ascending order? 04
(c) What is horizontal slicing method? Discuss horizontal slicing in ascending order with stowing with neat sketch 07
OR

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Q.3 (a) What are the factors affecting the division of a seam into slices? 03
(b) What are the problems in mechanization of thin seam working? Explain briefly. 04
(c) Discuss sublevel caving with neat sketch in detail. 07

Q.4 (a) What is hydraulic mining of coal? Write the conditions suitable for hydraulic mining of coal. 03
(b) What is diagonal slicing method? Explain briefly. 04

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(c) What are the different ways are used for the hydraulic transport of broken coal? Explain briefly. 07
OR
Q.4 (a) Explain layout of working for hydraulic mining with neat sketch. 03
(b) Explain hydro-chemical and biochemical methods of mining. 04
(c) How development and extraction is done in hydraulic mining operations? Explain briefly. 07

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Q.5 (a) Write the conditions suitable for underground gasification of coal. 03
(b) What are the advantages and disadvantages of hydraulic mining? 04
(c) What are the different methods of establishing linkages between boreholes in underground coal gasification? Explain briefly. 07
OR
Q.5 (a) What are the advantages of underground coal gasification? 03

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(b) Write a note on ore mining by leaching. 04
(c) Explain deep sea mining for manganese nodules. 07