Longwall Mining MCQ Questions - Part 02 | Indian Minerology

Longwall Mining MCQ Questions - Part 02

16. What is the main purpose of gate roads in Longwall mining?

• A. Transportation of coal
• B. Ventilation
• C. Movement of machinery
• D. All of the above

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Answer: D. All of the above

17. Which conveyor system is mainly used to transport coal in Longwall mining?

• A. Belt Conveyor
• B. Shuttle Conveyor
• C. Conveyor Chain (Armoured Face Conveyor)
• D. Portable Conveyor

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Answer: C. Conveyor Chain (Armoured Face Conveyor)

18. The retreating method in Longwall mining means:

• A. Coal extraction proceeds away from shaft
• B. Coal extraction proceeds towards shaft
• C. Extraction without gate roads
• D. It is another name for bord and pillar

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Answer: B. Coal extraction proceeds towards shaft

19. The advancing method in Longwall mining means:

• A. Extraction away from shaft or main entry
• B. Extraction towards shaft
• C. Extraction without supports
• D. Same as top slicing

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Answer: A. Extraction away from shaft or main entry

20. In Longwall mining, caving behind roof supports is generally:

• A. Controlled
• B. Avoided at all costs
• C. Not considered
• D. Ignored

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Answer: A. Controlled

21. Main hazard of gas accumulation in Longwall face is:

• A. Suffocation
• B. Explosion
• C. Reduced efficiency
• D. Dust problems

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Answer: B. Explosion

22. Which seam thickness is not favourable for Longwall method?

• A. < 1.2 m seams
• B. 1.5 – 3.0 m seams
• C. 3 – 5 m seams
• D. None of the above

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Answer: A. < 1.2 m seams

23. In Longwall mining, immediate roof supports advance:

• A. Simultaneously with coal cutting
• B. After a full shift
• C. Randomly
• D. Post-extraction

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Answer: A. Simultaneously with coal cutting

24. Longwall mining method was first started in:

• A. USA
• B. UK
• C. Germany
• D. India

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Answer: B. UK

25. Which roof behaviour is most dangerous in Longwall panels?

• A. Weight delay
• B. Sudden weighting (Bumps)
• C. Controlled caving
• D. None

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Answer: B. Sudden weighting (Bumps)

26. The cutting cycle of a shearer in Longwall mining is mainly:

• A. Bidirectional
• B. Unidirectional
• C. Random
• D. None

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Answer: A. Bidirectional

27. Gate road development is generally done by:

• A. Continuous miners or road headers
• B. Shearer
• C. Longwall plough
• D. Dragline

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Answer: A. Continuous miners or road headers

28. For thick seams Longwall, which modification is used?

• A. Longwall Top Coal Caving (LTCC)
• B. Bord & Pillar
• C. Sublevel Caving
• D. Slice Mining

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Answer: A. Longwall Top Coal Caving (LTCC)

29. Which is NOT an advantage of Longwall mining?

• A. High production
• B. Improved safety
• C. Selective mining of quality coal
• D. Lower cost per ton

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Answer: C. Selective mining of quality coal

30. Longwall mining panels are separated by:

• A. Barrier pillars
• B. Small ribs
• C. Shaft pillars
• D. None

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Answer: A. Barrier pillars

📚 Longwall Mining MCQ Series

"This question series has been created to better understand Longwall Mining and to prepare for the exam." ✅

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