GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-V (NEW) EXAMINATION - SUMMER 2019
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Subject Code: 2152206 Date: 06/06/2019Subject Name: Underground coal Mining
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) Write a short note on Rank of Coal. 03
(b) Explain the classification of mining methods. 04
(c) Explain the various origin of coal. 07
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Q.2 (a) Define the Coal. Explain various types of coal. 03
(b) Discuss shape and size of panel system used in mining. 04
(c) Explain the hydraulic stowing method with neat sketch. 07
OR
(c) Describe the origin of stratified deposits. 07
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Q.3 (a) Explain various coal resources in India. 03
(b) Discuss the cycle of operation in mining. 04
(c) Define stowing and write their principal of working. 07
OR
Q.3 (a) Discuss the application of panel system. 03
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(b) What are the precautions against fire during and after depillaring operation? 04(c) Explain the differential between board & pillar and long wall mining. 07
Q.4 (a) Define: Gallery, Panel and District. 03
(b) Write note on Characteristics of Roof and Floor. 04
(c) Describe various factors are influencing for the choice of Mining Method. 07
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OR
Q.4 (a) Explain: Why in India only most of Board and Pillar Method is used? 03
(b) Write advantages and disadvantages of Board and Pillar Method. 04
(c) Write a short note on Long wall advancing method. 07
Q.5 (a) Define: Stook, Barrier and Chokidar. 03
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(b) Write note on Hand Packing Method of stowing. 04(c) Explain Board and Pillar Method in brief with neat sketch. 07
OR
Q.5 (a) What are the disadvantages of stowing methods? 03
(b) Describe the extraction of pillars in contiguous seam. 04
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(c) Write notes on Hydraulic profile and H: L ratio in hydraulic stowing System. 07--- Content provided by FirstRanker.com ---
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