SET 3 Flashcards

Finals

1
Q

The most important underground mining method in practice today

A

Room and Pillar Mining

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2
Q

Unmined portion of the deposit, providing support to the roof

A

Pillar

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3
Q

Mixed out areas

A

Room

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4
Q

Self-supporting and only requires the addition of minimal artificial supports to achieve a stable opening

A

Rock

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5
Q

Applies to flat deposits having moderate to thick beds and to inclined deposits with thicker beds

A

Classic room and pillar mining

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6
Q

An adaptation of trackless mining to ore bodies where the dip is too steep for rubber-tired vehicles

A

Step room and pillar mining

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7
Q

Have large vertical heights where the mined-out space is hydraulically backfilled with tailings; combination of room and pillar and cut-and-fill- stoping

A

Room and pillar mining

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8
Q

Technique involves strategically removing the remaining pillars, causing the roof to collapse

A

Retreat Mining

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9
Q

It is a production opening in a metal mine where thicker and more irregular ore bodies occur

A

Stope

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10
Q

Are spaced randomly, located in low grade ore so that the high-grade ore can be extracted

A

Pillars

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11
Q

It is the oldest underground mining method; classified as a large-scale method in terms of total production

A

Stope and Pillar Mining

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12
Q

It can operate efficiently at angles up to 30ᵒ, it utilizes rail haulage

A

Inclined Stope and Pillar

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13
Q

100% of the ore in the stope is extracted; no natural pillars are left for support

A

Breast Stoping

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14
Q

Utilizes trackless haulage across the dip

A

Step Stope and Pillar

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15
Q

Equipment and Primary Opening used for relatively shallow depth

A

Conveyor belt; stope

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16
Q

Equipment and Primary Opening used for greater depth

A

Hoist; vertical shaft

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17
Q

Technique used when pillars are larger than necessary to provide good support

A

Pillar robbing and slabbing

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18
Q

Happens below the top of the orebody; accounts for 80% of the mine’s production

A

First Pass

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19
Q

Removal of the blasted ore; done by drilling and blasting the breast until the top of the orebody is reached

A

Second Pass

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20
Q

Blasting the benches. Benches are blasted and have been blasted horizontally with 1-3/4 in holes

A

Third Pass

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21
Q

An overhand method in which the ore is mined in horizontal slices from bottom to top and remains in the stope

A

Shrinkage Stoping

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22
Q

The required ore grade of the orebody for shrinkage stoping

A

High grade

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23
Q

This must be provided at the sill level into which the ore initially breaks and subsequently flows

A

Horizontal undercut

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24
Q

Method of extracting in large scale mining and has three variations

A

Sublevel Stoping

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25
Q

Most traditional method of Sublevel Stoping; drill radial patterns of drillhole is used

A

Blasthole method (Ring Drilling)

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26
Q

Drill parallel holes from top to bottom of the stope; efficient in explosive consumption.

A

Open-ending method (Parallel Drilling)

27
Q
A
28
Q

Only supported method commonly used today; 3% of underground mineral production is derived from this method

A

Cut and Fill Stoping

29
Q

Common variation of Cut and Fill stoping that starts at the lower level and works upward

A

Overhand cut-and-fill stoping

30
Q

A variation of Cut and Fill stoping that works from the top downward

A

Underhand cut-and-fill stoping

31
Q

Preferred fill material for cut and fill stoping

A

High-density hydraulic fill

32
Q

A German-born American immigrant Mining engineer who invented the
square-set system

A

Philip Deidesheimer

33
Q

The process of extracting the desired ore or other mineral from underground mine, leaving behind an open space

A

Stoping

34
Q

A method relying on square-set timbering, used where the ore is weak, and the walls are not strong enough to support themselves

A

Square Set Stoping

35
Q

They interlock and are filled with broken waste rock or sand fill

A

Timber sets

36
Q

These are usually added after one tier of sets, or stope cut, is made

A

Waste rock or sand fill

37
Q

Square-set timbers are set into place as support and are then filled with?

A

Cement

38
Q

Most common type of stope for a square set

A

Overhand stope

39
Q

Mining method applicable to tabular deposits of uniform shape, and limited thickness in which a long face is established to extract the mineral

A

Longwall Stoping

40
Q

In United States, more than 50% of all underground mined coal is mined by this method

A

Longwall Stoping

41
Q

A powerful cutting machine mounted on a platform and is equipped with cutting drums positioned against the coal seam and cut away the face of a coal seam

A

Shearer

42
Q

A massive steel structure containing a chain conveyor transports coal from face to the headgate

A

Armoured Face Conveyor

43
Q

It supports the overburden during mining operations As the longwall system advances through the seam of coal

A

Hydraulic Chocks

44
Q

Require extensive maintenance to maintain the roadway cross-section (roof and floor brushing) during the life of the longwall block

A

Longwall Advancing Method

45
Q

2 sets of entries are driven between 100 to 250m apart, and then connected by a longwall

A

Longwall Retreat

46
Q

An underground mining method allowing earlier production than sublevel stoping with less upfront development than traditional block caving

A

Sublevel Caving

47
Q

A large-scale mining method suitable for large ore bodies with a steep dip and a rock mass with a host rock in the hanging wall will fracture under controlled conditions

A

Sublevel Caving

48
Q

Usually undertaken when mining the orebody through an open pit is no longer economically viable

A

Sublevel Caving

49
Q

An underground hard rock mining method that involves undermining an ore body, allowing it to progressively collapse under its own weight

A

Block Caving

50
Q

Ore from draw points flows directly to the transfer raizes, to ore cars

A

Grizzly/Gravity

51
Q

Uses slusher scrapers for the main production unit

A

Slusher system

52
Q

Employs mechanical loading equipment to elevate and deposit material flowing through the draw points

A

Loader method

53
Q

The region’s rock mechanics must be thoroughly understood before a mine isestablished

A

Mine Layout

54
Q

Orebody of metallic minerals formed by the replacement of sedimentary, usually carbonate rock

A

Skarn Deposit

55
Q

World’s largest underground salt
mine; evaporite (room and pillar)

A

GODERICH SALT MINE

56
Q

3rd largest underground mine in
the Philippines (room and pillar)

A

Co-O Mine

57
Q

Largest underground mine (Cut and fill stoping) US

A

Bunker Hill Mine

58
Q

Deepest underground mine (Cut and fill stoping) US

A

Star-Morning

59
Q

Richest silver mine (Cut and fill stoping) US

A

Sunshine

60
Q

The television series that aire an episode about Philipp Deidesheimer

A

Bonanza

61
Q

Least used mining method

A

Square set stoping

62
Q

Largest underground iron ore mine in the world in terms of production (sublevel caving)

A

Kiruna Iron Ore Mine

63
Q

Seen as one of the current three large-scale projects in the country to become a major copper and gold producer (sublevel caving)

A

Silangan Project

64
Q

The first underground block cave operation in the far east (Block caving)

A

Padcal Mine, Philex, Benguet