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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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Mining Safety MCQ Questions - Part 04 | Indian Minerology
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Mining Safety MCQ Questions - Part 04
⛑️ Mining Safety MCQ Questions - Part 04
46. Which gas is the primary cause of most mine explosions?
A. Carbon monoxide
B. Methane
C. Hydrogen
D. Nitrogen
Show Answer
Answer: B. Methane
47. What is the permissible limit of methane in return airways?
A. 0.5%
B. 1.0%
C. 1.25%
D. 2.0%
Show Answer
Answer: C. 1.25%
48. Methane drainage in mines is usually done by:
A. Blasting
B. GOB wells / boreholes
C. Sand filling
D. Water infusion
Show Answer
Answer: B. GOB wells / boreholes
49. A refuge chamber must be designed to provide life support for at least:
A. 4 hours
B. 8 hours
C. 24 hours
D. 48 hours
Show Answer
Answer: C. 24 hours
50. In case of fire, the primary safe direction of escape is towards:
A. Return airway
B. Intake airway
C. Goaf
D. Shaft bottom
Show Answer
Answer: B. Intake airway
51. Which gas is called “afterdamp”?
A. Methane
B. CO + CO2 mixture after explosion
C. Oxygen
D. SO2
Show Answer
Answer: B. CO + CO2 mixture after explosion
52. Emergency response plan in mines should include:
A. Escape route plans
B. Trained rescue team
C. Mock drills
D. All of the above
Show Answer
Answer: D. All of the above
53. Which organisation in India approves mine rescue standards?
A. DGMS
B. CIL
C. ISRO
D. ONGC
Show Answer
Answer: A. DGMS
54. Main personal protection inside a refuge chamber is:
A. Oxygen supply
B. AC system
C. Fireproof clothing
D. Safety belts
Show Answer
Answer: A. Oxygen supply
55. In emergency planning, mock rehearsals should be conducted:
A. Yearly
B. Half-yearly
C. Quarterly
D. Monthly
Show Answer
Answer: C. Quarterly
56. Flameproof apparatus in mines is used to prevent:
A. Entry of gas
B. Sparks igniting methane
C. Water leakage
D. Dust flow
Show Answer
Answer: B. Sparks igniting methane
57. The standard distance between two main air shafts is about:
A. 100 m
B. 300 m
C. 500 m
D. 1000 m
Show Answer
Answer: C. 500 m
58. Emergency communication in mines is generally done by:
A. Mobile phones
B. Wired intercom systems
C. Cap-lamp signals
D. All of the above
Show Answer
Answer: D. All of the above
59. Risk assessment in mines mainly focuses on:
A. Identifying hazards
B. Evaluating risks
C. Implementing controls
D. All of the above
Show Answer
Answer: D. All of the above
60. Refuge chamber capacity is generally designed per:
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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