Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Coal Mining > Lesson 4: Underground Mining Identification > Flashcards

Lesson 4: Underground Mining Identification Flashcards

1
Q

This underground mining method involves mechanized systems that shear coal from a panel using a shearer and hydraulic roof supports. The roof behind the shearer is allowed to collapse in a controlled manner.

A

Longwall Mining

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

In longwall mining, the coal extraction is planned along a specific area known as a ________, which is usually around 3000 meters long and 250 meters wide.

A

Panel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

This component of longwall mining consists of mechanized supports that hold the roof up as the shearer advances, then allow the roof to collapse behind them.

A

Hydraulic roof supports (self-advancing hydraulic roof supports)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Which mining technique leaves large blocks of ore to support the roof in a grid pattern, while the surrounding material is extracted, leading to low recovery rates?

A

Room and Pillar Mining

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

In which underground mining method are the coal pillars removed at the farthest point from the mine access, allowing the roof to collapse as the miners retreat?

A

Retreat Mining

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The build-up of methane gas in an underground mine is called ________ and poses a significant explosion risk.

A

Fire damp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

In mining terminology, what is the process of removing the ore body while leaving some of it in place to support the roof, commonly used in shallow coal seams?

A

Room and Pillar Mining

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Which method is used for deep mining but is less common than longwall mining and involves shearing coal panels with continuous miners and moveable roof supports?

A

Shortwall Mining

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Name the gas mixture that forms in underground mines from a combination of carbon dioxide and nitrogen, leading to suffocation due to oxygen depletion.

A

Black damp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

This older mining method involves breaking up the coal seam using explosives and accounts for less than 5% of underground coal production today.

A

Blast Mining

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What type of hazardous gas in underground mining consists primarily of methane and can cause explosions at concentrations between 5% and 15%?

A

Methane (Fire damp)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Identify the name of the disease caused by long-term exposure to coal dust, characterized by the buildup of dust in the lungs.

A

Pneumoconiosis (Black lung disease)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What mining method is most suitable for flat-lying, shallow seams where the ore is extracted in a grid pattern, leaving behind large pillars for support?

A

Room and Pillar Mining

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

In underground mining, which process allows for greater ore recovery by removing support pillars in a controlled manner and letting the roof collapse?

A

Retreat Mining

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What term is used to describe a post-explosion hazard in coal mines that consists of a mixture of carbon monoxide, carbon dioxide, and nitrogen?

A

After damp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

This gas is responsible for causing suffocation in underground mines due to the depletion of oxygen and results from corrosion in confined spaces.

A

Black damp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

In longwall mining, coal is cut and transported out of the mine using what mechanized system?

A

Conveyor system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What mining method is commonly referred to as continuous mining because of its mechanized nature and the use of machines to shear, transport, and support the ore body?

A

Room and Pillar Mining

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

This underground mining hazard consists of a toxic gas with the chemical formula H₂S, known for its characteristic rotten egg smell.

A

Stink damp (Hydrogen sulfide)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is the maximum safe concentration range for methane in an underground coal mine to prevent the risk of explosion?

A

5% to 15%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

In what type of mining is a series of parallel tunnels (gate roads) constructed to allow the mechanized shearer to extract long panels of coal?

A

Longwall Mining

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is the mining term for the spontaneous combustion of coal or other organic materials, often leading to underground fires?

A

Spontaneous combustion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

This type of mining is particularly prone to subsidence due to the removal of support pillars, causing the ground above to collapse.

A

Room and Pillar Mining (with retreat mining)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What piece of equipment in longwall mining moves continuously along the coal face to shear the coal and transfer it to conveyors?

A

Shearer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Name the toxic gas found in coal mines that forms after a mine explosion and can cause asphyxiation.

A

After damp

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

This method leaves a grid-like pattern of ore in place to support the roof and is often used in shallow coal deposits.

A

Room and Pillar Mining

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Identify the mining method in which coal is cut mechanically and transported away from the face using a conveyor system.

A

Longwall Mining

28
Q

What safety measure in underground mining involves monitoring and controlling the buildup of dangerous gases, especially methane and carbon monoxide?

A

Gas monitoring systems

29
Q

In longwall mining, the roof is allowed to collapse in a controlled manner behind what mechanized component of the mining system?

A

Hydraulic roof supports

30
Q

In underground coal mining, this continuous mining machine is used to cut and remove coal from the working face, typically operating with minimal manual intervention.

A

Continuous Miner

31
Q

What type of coal mining method uses self-advancing hydraulic roof supports and a continuous shearer to extract coal from a panel?

A

Longwall Mining

32
Q

Which gas mixture in underground mining, known for its asphyxiating properties, is composed mainly of nitrogen and carbon dioxide?

A

Black damp

33
Q

Name the mining method where coal panels up to 200 feet wide are sheared off by a continuous mining machine with moveable roof supports.

A

Shortwall Mining

34
Q

In the context of mining, what is the term for a vertical or near-vertical shaft used to extract minerals from deep underground?

A

Shaft

35
Q

What term describes the natural settling or collapse of the ground above an underground mine after the extraction of minerals?

A

Subsidence

36
Q

Which type of mining damp consists of carbon monoxide and is responsible for poisoning miners after a mine explosion?

A

After damp

37
Q

Identify the mining term for a series of support pillars left in place during extraction, which are later removed in retreat mining.

A

Pillars

38
Q

This type of mining system relies on continuous extraction of ore with machines, without the need for manual drilling or blasting.

A

Continuous Mining

39
Q

What term is used for the conveyor system that runs parallel to the coal face in longwall mining and transports the extracted coal out of the mine?

A

Conveyor system

40
Q

Which gas, composed of carbon monoxide, carbon dioxide, and nitrogen, forms after a mine explosion and poses significant health risks?

A

After damp

41
Q

Name the mining method that leaves large columns of ore behind to support the roof while the surrounding ore is mined.

A

Room and Pillar Mining

42
Q

What hazardous underground mining condition results from the spontaneous combustion of coal, often leading to fires?

A

Spontaneous combustion

43
Q

In longwall mining, the continuous extraction of ore is achieved using what type of mechanized cutting device?

A

Shearer

44
Q

Identify the term for the toxic gas produced by the breakdown of organic materials in mines, which is often mistaken for steam or vapor.

A

Damp (White damp for carbon monoxide)

45
Q

What mining term describes the controlled collapse of the roof behind the working face in longwall mining operations?

A

Controlled collapse (Caving)

46
Q

Name the continuous mining machine that shears coal from the panel in longwall mining operations.

A

Shearer

47
Q

This underground mining hazard is formed when hydrogen sulfide gas accumulates, posing a toxic risk to miners.

A

Stink damp (Hydrogen sulfide)

48
Q

What term refers to the vertical shafts or tunnels used to transport workers and ore in and out of deep underground mines?

A

Shaft

49
Q

In room and pillar mining, what is the name of the large columns of ore left behind to support the ceiling?

A

Pillars

50
Q

What process in underground mining allows for greater recovery of ore by removing support pillars and letting the roof collapse behind the miners?

A

Retreat Mining

51
Q

Identify the underground mining technique that involves shearing panels of coal with a continuous miner, while the roof is supported by hydraulic systems.

A

Longwall Mining

52
Q

This gas, a byproduct of spontaneous combustion in mines, is highly toxic and smells like rotten eggs.

A

Stink damp (Hydrogen sulfide)

53
Q

What type of damp, formed from carbon monoxide, can cause suffocation after a mine explosion?

A

After damp

54
Q

Name the method of mining where a vertical shaft is sunk to access minerals located deep underground.

A

Shaft mining

55
Q

What mining hazard involves the buildup of flammable methane gas in an enclosed space, leading to a risk of explosion?

A

Fire damp

56
Q

Identify the component of longwall mining that is responsible for cutting and transporting the coal from the face of the seam.

A

Shearer

57
Q

This underground mining method uses large self-advancing hydraulic supports and a continuous shearer to extract coal.

A

Longwall Mining

58
Q

In underground mining, which term describes the mixture of carbon dioxide and nitrogen that depletes oxygen levels, leading to suffocation?

A

Black damp

59
Q

Name the mining method where coal seams are sheared with a continuous miner, and the roof collapses behind the equipment as it moves forward.

A

Longwall Mining

60
Q

This type of mining utilizes explosives to break up the coal seam and is seldom used today due to the risks associated with it.

A

Blast Mining

61
Q

What mining term describes the collapse of the roof in a controlled manner after ore extraction has been completed?

A

Controlled collapse (Caving)

62
Q

Which mining technique involves continuous extraction of ore using machines, with minimal manual labor involved in the cutting and transport processes?

A

Continuous Mining

63
Q

In longwall mining, what device is responsible for transferring the coal from the face to the conveyor belt?

A

Conveyor system

64
Q

What mining method leaves large, grid-like columns of ore to support the roof, typically used in shallow ore bodies?

A

Room and Pillar Mining

65
Q

Name the hazardous gas mixture that forms after a mine explosion and consists of carbon monoxide and carbon dioxide.

A

After damp

66
Q

In underground mining, what is the term for the explosive concentration of methane gas, which can ignite if exposed to a spark or flame?

A

Fire damp

67
Q

This term refers to the removal of pillars from room and pillar mining, leading to the collapse of the roof behind the miners.

A

Coal Mining (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions