Indian Minerology: Global Mining Engineers Blog; Miners Study Hub. Master open-cast and underground operations, safety rules, machinery tips, quizzes and career guides worldwide. Subscribe for updates! #MiningEngineersBlog, #OpenCastMining, #UndergroundMining, #IndianMinerology, #WorldWideMining, #Mining Engineering Blog | DGMS Preparation | Open Cast Mining
DGMS CMR 2026: Latest Changes in Coal Mines Regulations (CMR 2017) DGMS CMR 2026: Latest Changes in Coal Mines Regulations Explained The Directorate General of Mines Safety (DGMS) has introduced important updates under the Coal Mines Regulations, 2017 (CMR) during 2025–26 to strengthen safety, supervision, and statutory compliance in coal mines across India. This article explains only the confirmed changes within CMR , without including draft rules or general safety circulars. 1. Amendment in Regulation 30 – Assistant Manager Provisions DGMS has amended Regulation 30 of CMR 2017 through a Gazette Notification to revise requirements related to Assistant Managers . Key Changes The number of Assistant Managers is now linked to mine production and operational scale High-production coal mines must deploy additional Assistant Managers At least one Assistant Manager must hold a First Class Manager’s Certificate in large mines Impact: Thi...
Get link
Facebook
X
Pinterest
Email
Other Apps
Longwall Mining MCQ Questions - Part 02 | Indian Minerology
Get link
Facebook
X
Pinterest
Email
Other Apps
-
Longwall Mining MCQ Questions - Part 02
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
Show Answer
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
Show Answer
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
Show Answer
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
Show Answer
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
Show Answer
Answer: A. Controlled
21. Main hazard of gas accumulation in Longwall face is:
A. Suffocation
B. Explosion
C. Reduced efficiency
D. Dust problems
Show Answer
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
Show Answer
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
Show Answer
Answer: A. Simultaneously with coal cutting
24. Longwall mining method was first started in:
A. USA
B. UK
C. Germany
D. India
Show Answer
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
Show Answer
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
Show Answer
Answer: A. Bidirectional
27. Gate road development is generally done by:
A. Continuous miners or road headers
B. Shearer
C. Longwall plough
D. Dragline
Show Answer
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
Show Answer
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
Show Answer
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
Show Answer
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." ✅
ADVANCING AND RETREATING LONGWALLS:- Advancing Longwalls:- In this method, the face start point is close to the main headings, usually leaving a barrier pillar to protect them. Once the face equipment is installed, extraction commences working away from the main headings towards the block limit. Obviously the main and tailgates do not exist prior to the start of extraction and have to be formed at each end of the face as mining progresses. The gate roads are effectively in the goaf and a false rib has to be installed on one side, usually by constructing a small pillar, sometimes using stone cut from the roof in thin seams or using some type of cementitious material brought into the mine. Such gate roads tend to require a very heavy support system (yielding steel arches have often been used). Principle of advancing longwall Advancing longwalls were once common in Europe in relatively thin seams where packs were constructed using stone, which had ...
Which is the deepest mine in India? Which is the deepest mine in India? Mining is all about who well you can dig and how deep you can dig to get the desired mineral. In the process, India have also evolved to innovate methods to dig deep and have constructed one of the world's deepest mines.
Continuous Miner:- Continuous Miner:- A continuous miner is a mining machine that produces a constant flow of ore from the working face of the mine. The machine continuously extracts as it is loading coal with a cutting steel drum and conveyor system. Continuous miners are typically used in room and pillar mining operations. The continuous miner is different from conventional or cyclical mining methods, which halt the extraction process in order for ore-loading to proceed. Continuous miners, which began to take off in the mining industry in the 1940s, make up of 45 percent of the underground coalmine production. Today, continuous miners are being developed as driverless machines controlled via remote control. History:- Early Miners:- The continuous miner has been available in some form since the late 1800s. The first machine to resemble a continuous miner was known as the English Channel Machine. The pneumatically driven machine could travel 1.5 miles (2...
Comments