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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 03 | Indian Minerology
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Mining Safety MCQ Questions - Part 03
⛑️ Mining Safety MCQ Questions - Part 03
31. The main cause of mine fires in coal mines is:
A. Methane explosion
B. Spontaneous heating of coal
C. Blasting
D. Electrical faults
Show Answer
Answer: B. Spontaneous heating of coal
32. The best firefighting agent for coal mine fire is:
A. Water
B. Sand
C. Inert gases (N2/CO2)
D. Foam
Show Answer
Answer: C. Inert gases (N2/CO2)
33. Which type of fire extinguisher is used for electrical fires?
A. Water type
B. Foam type
C. CO2 type
D. Dry sand
Show Answer
Answer: C. CO2 type
34. A major precaution while handling explosives in mines is:
A. Store with diesel
B. Keep away from fire/heat
C. Carry in open baskets
D. Store with detonators together
Show Answer
Answer: B. Keep away from fire/heat
35. The statutory distance between explosive magazine and building is at least:
A. 50 m
B. 90 m
C. 120 m
D. 180 m
Show Answer
Answer: D. 180 m
36. Permitted explosives are used in gassy mines because:
A. Cost is low
B. Produce minimal flame & sparks
C. Easily available
D. Safe to handle manually
Show Answer
Answer: B. Produce minimal flame & sparks
37. Blasting in fiery seams is generally done with:
A. Electric detonators
B. Permitted explosives and detonators
C. Open flame ignition
D. Gunpowder cartridges
Show Answer
Answer: B. Permitted explosives and detonators
38. Use of PPE in mines is governed by:
A. International Labour Rules
B. Mines Act & DGMS guidelines
C. Company instructions only
D. None
Show Answer
Answer: B. Mines Act & DGMS guidelines
39. Safety helmets in underground mines must have:
A. Only strong shell
B. Lamp fixing arrangement
C. Proper suspension & chin strap
D. All of the above
Show Answer
Answer: D. All of the above
40. The effectiveness of dust respirators depends mainly on:
A. Mask fitting/leakage
B. Colour of mask
C. Weight of mask
D. Worker experience
Show Answer
Answer: A. Mask fitting/leakage
41. Anemometer in mine safety is used to measure:
A. Temperature
B. Air velocity
C. Dust concentration
D. Humidity
Show Answer
Answer: B. Air velocity
42. Shotfirer in mining is responsible for:
A. Checking mine records
B. Blasting operations as per safety code
C. Supervising ventilation
D. Roof bolting
Show Answer
Answer: B. Blasting operations as per safety code
43. Detonators must be stored:
A. With explosives in same box
B. Separately in approved magazine
C. With diesel containers
D. With timber packs
Show Answer
Answer: B. Separately in approved magazine
44. PPE for eyes during drilling/blasting operations is:
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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