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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...
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Mine Ventilation MCQ Questions - Part 05 | Indian Minerology
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Mine Ventilation MCQ Questions - Part 05 (Final)
🌬️ Mine Ventilation MCQ Questions - Part 05 (Final)
61. In India, who is responsible for enforcement of ventilation rules in mines?
A. DGMS
B. CIL
C. Ministry of Coal
D. State Govt
Show Answer
Answer: A. DGMS
62. As per Coal Mines Regulations, velocity of air in gassy seams should not be less than:
A. 0.25 m/s
B. 0.5 m/s
C. 1.0 m/s
D. 2.0 m/s
Show Answer
Answer: B. 0.5 m/s
63. In fiery seams, what type of fans are mandatory?
A. Ordinary fans
B. Flameproof electrical fans
C. Booster fans only
D. Hand fans
Show Answer
Answer: B. Flameproof electrical fans
64. Which form is required to record statutory ventilation measurements?
A. Form 6A
B. Form 2
C. Mine Diary
D. Rescue Report
Show Answer
Answer: A. Form 6A
65. Ventilation planning for a new mine is mainly based on:
A. Seam thickness
B. Production rate & gas emission
C. Stowing method
D. Location of fans
Show Answer
Answer: B. Production rate & gas emission
66. Pressure survey in mines is done to:
A. Measure fan speed
B. Check distribution & leakage
C. Gas emission
D. Roof load
Show Answer
Answer: B. Check distribution & leakage
67. In case of fire, reverse ventilation is applied to:
A. Supply fresh air
B. Drive back smoke & gases from shaft
C. Reduce heat
D. Increase methane
Show Answer
Answer: B. Drive back smoke & gases from shaft
68. For effective fire control, which gas monitoring is most important?
A. Oxygen %
B. Methane %
C. Carbon monoxide %
D. Nitrogen %
Show Answer
Answer: C. Carbon monoxide %
69. A case study of Chasnala disaster (1975) highlighted need for:
A. Stronger stoppings
B. Flood control in mines
C. Better electrical safety
D. Manpower increase
Show Answer
Answer: B. Flood control in mines
70. Ventilation stopping material preferred in fiery seams:
A. Wood
B. Brick / Concrete
C. Canvas sheet
D. Cardboard
Show Answer
Answer: B. Brick / Concrete (airtight)
71. Ventilation plans & surveys must be updated at least:
A. Once in 6 months
B. Yearly
C. Every 3 months
D. Monthly
Show Answer
Answer: C. Every 3 months
72. The maximum velocity of air in haulage roadways allowed is:
A. 6 m/s
B. 8 m/s
C. 10 m/s
D. 12 m/s
Show Answer
Answer: A. 6 m/s
73. Shock losses in mine ventilation occur at:
A. Long straight roadways
B. Bends, junctions & splits
C. Shafts only
D. Fan
Show Answer
Answer: B. Bends, junctions & splits
74. The factor of safety in mine fans is generally taken as:
A. 1.0
B. 1.25
C. 1.5
D. 2.0
Show Answer
Answer: C. 1.5
75. Ultimate goal of mine ventilation is to:
A. Increase coal output
B. Maintain safe & healthy environment underground
C. Reduce power cost
D. Increase air humidity
Show Answer
Answer: B. Maintain safe & healthy environment underground
🌬️ Mine Ventilation MCQ Series (Complete)
You have completed all 75 Mine Ventilation MCQs divided across 5 Parts.
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...
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