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MINING GEOLOGY > SET 3 > Flashcards

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
Most traditional method of Sublevel Stoping; drill radial patterns of drillhole is used
Blasthole method (Ring Drilling)
26
Drill parallel holes from top to bottom of the stope; efficient in explosive consumption.
Open-ending method (Parallel Drilling)
27
28
Only supported method commonly used today; 3% of underground mineral production is derived from this method
Cut and Fill Stoping
29
Common variation of Cut and Fill stoping that starts at the lower level and works upward
Overhand cut-and-fill stoping
30
A variation of Cut and Fill stoping that works from the top downward
Underhand cut-and-fill stoping
31
Preferred fill material for cut and fill stoping
High-density hydraulic fill
32
A German-born American immigrant Mining engineer who invented the square-set system
Philip Deidesheimer
33
The process of extracting the desired ore or other mineral from underground mine, leaving behind an open space
Stoping
34
A method relying on square-set timbering, used where the ore is weak, and the walls are not strong enough to support themselves
Square Set Stoping
35
They interlock and are filled with broken waste rock or sand fill
Timber sets
36
These are usually added after one tier of sets, or stope cut, is made
Waste rock or sand fill
37
Square-set timbers are set into place as support and are then filled with?
Cement
38
Most common type of stope for a square set
Overhand stope
39
Mining method applicable to tabular deposits of uniform shape, and limited thickness in which a long face is established to extract the mineral
Longwall Stoping
40
In United States, more than 50% of all underground mined coal is mined by this method
Longwall Stoping
41
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
Shearer
42
A massive steel structure containing a chain conveyor transports coal from face to the headgate
Armoured Face Conveyor
43
It supports the overburden during mining operations As the longwall system advances through the seam of coal
Hydraulic Chocks
44
Require extensive maintenance to maintain the roadway cross-section (roof and floor brushing) during the life of the longwall block
Longwall Advancing Method
45
2 sets of entries are driven between 100 to 250m apart, and then connected by a longwall
Longwall Retreat
46
An underground mining method allowing earlier production than sublevel stoping with less upfront development than traditional block caving
Sublevel Caving
47
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
Sublevel Caving
48
Usually undertaken when mining the orebody through an open pit is no longer economically viable
Sublevel Caving
49
An underground hard rock mining method that involves undermining an ore body, allowing it to progressively collapse under its own weight
Block Caving
50
Ore from draw points flows directly to the transfer raizes, to ore cars
Grizzly/Gravity
51
Uses slusher scrapers for the main production unit
Slusher system
52
Employs mechanical loading equipment to elevate and deposit material flowing through the draw points
Loader method
53
The region's rock mechanics must be thoroughly understood before a mine isestablished
Mine Layout
54
Orebody of metallic minerals formed by the replacement of sedimentary, usually carbonate rock
Skarn Deposit
55
World’s largest underground salt mine; evaporite (room and pillar)
GODERICH SALT MINE
56
3rd largest underground mine in the Philippines (room and pillar)
Co-O Mine
57
Largest underground mine (Cut and fill stoping) US
Bunker Hill Mine
58
Deepest underground mine (Cut and fill stoping) US
Star-Morning
59
Richest silver mine (Cut and fill stoping) US
Sunshine
60
The television series that aire an episode about Philipp Deidesheimer
Bonanza
61
Least used mining method
Square set stoping
62
Largest underground iron ore mine in the world in terms of production (sublevel caving)
Kiruna Iron Ore Mine
63
Seen as one of the current three large-scale projects in the country to become a major copper and gold producer (sublevel caving)
Silangan Project
64
The first underground block cave operation in the far east (Block caving)
Padcal Mine, Philex, Benguet

MINING GEOLOGY (3 decks)

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