Brainscape's Knowledge GenomeTM

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


See full index

Mining > Day 1 Mining Methods and Ventilation > Flashcards

Day 1 Mining Methods and Ventilation Flashcards

1
Q

Minimum Width w/c eart-moving eqpt can operate

A

Boxcut

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

Wedge of waste on the slope of orebody

A

Wedge

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

Index used in com profitability of different mining operations

A

Stripping Index

Instantaneous SR / Ore grade

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

Desired pH of soil

A

5.5 to 6.5

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

Number of significant figures to w/c measurements have been made

A

Resolution

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

Used to measure displacement thru boreholes

A

Multirod extensometer

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

How many components of stress in a 3D object

A

9

3 for ea axis

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

1 d stress measurement method in borehole

A

Flatjack

Hydraulic fracturing

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

2 D stress measurement in borehole

A

USBM gauge

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

3D stress measurement in borehole

A

CSIRO gauge

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

Stress that breaks majority of rock in blasting

A

Reflected Tensile wave

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

When there is a gap of air bet explosive and rock

A

Decoupled explosive

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

Tool for soft rock used by roadheaders

A

Drag pick

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

Used in TBM to cut harder rocks

A

Disc/Button Cutter

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

Failure due to discontinuities

A

Structural failure

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

What does a wedge in a timberset do

A

For better fit from roof to floor

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

Fxn of header in a timberset

A

So the prop can support a larger area of roof or floor

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

Desc Cable bolt

A

Two bolts connected by wire

Installed separately then wire is tensioned

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

Cause of Type 1 fracture

A

Overall stress dist

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

Cause of type 2 fracture

A

slip on pre-existing discon

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

Type 3 fracture cause

A

Local concentration of stress

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

Intact rock madeup of rock mass and discontinuities

A

Rockmass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q 
Macroscopic features of rock such as
Arrangement
Position
Fractures
fold
Faults
A

Structure

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

Void ratio =

A

Volume of voids/Vol of solid

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

Moisture content =

A

W-Wsolid / Wsolid

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

Rate w/c temp spreads thru body

A

Therma Diffusivity

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

Amount of heat transferred thru conduction

A

Thermal conductivity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

Use in Tensile Strength test

A

Brazilian Test

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Use for Triaxial strength test

A

Hoek Cell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

Distance bet discontinuity surfaces

A

Separation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

Rock classification

Predicting the load on steel arch support in tunneling

A

Terzaghi - Rock Load Classification

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Relates Stand-up time to unsup span of rock mass

A

Lauffer Stand-up time Classification

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

Lauffer system became the basis for this

A

NATM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

Deere’s RQD =

A

(total length drilled > 10 cm) / length drilled

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

3 parameter in Wickham’s Rock Structure Rating

A

A. Rock structure
B. Discontinuity Pattern
C. Groundwater Inflow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

Created the RMR System

A

Bieniawski

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

Slope angle for Sands

A

37-45 deg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

Slope angle for Massive rock

A

70 deg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Slope angle of Soills

A

30 - 40 deg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

Other name for Toe Buttress

A

Retaining Walls

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

Found just above bedrock

A

Regolith

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

Alcohol in Nitric acid solution of metlas is called

A

Fulmates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

Black powder coated with glycerin

A

3300 ft/sec

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

Combination of NG and Guncotton

A

Blasting Gelatin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

One of its ingredient is wood pulp

A

Dynamite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
46
Q

Diff of Straight dynamites and Dynamite

A

Straight dynamite cont Ca/Mg Carbonate

Creates lots of CO

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
47
Q

Alcohol subs for NG to make this

A

Low Freezing Dynamites

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
48
Q

Dynamite that produces less fumes

A

Ammonia Dynamites

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
49
Q

Boreholes filled with water and blasting gelatin abpplication

A

Geophys exploration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
50
Q

Blasting gelatin with AN as chief ingredient

A

Semi-gelatin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
51
Q

Dynamite with AN as chief ingredient

A

Low Density Dynamite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
52
Q

Used in quarrying

A

Quarry powder

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
53
Q

Black powder that produces less smoke

A

Pellet powder

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
54
Q

Compressed air at 10000psi used in coal mines

A

Airdox

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
55
Q

Liquid Carbon Dioxide cjompressed at 2000 psi then detonated

A

Cardox

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
56
Q

Just like Cardox but detoinated by Ammonia chloride and sodium nitrate

A

Hydrox

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
57
Q

Provides high velocity shock to high explosives to initiate them

A

Detonators

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
58
Q

Most common Detonator

A

Blasting cap

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
59
Q

Used to initiate grp of explosives simultaneously

A

Delay detonators

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
60
Q

Pushes itself into charge after ignitio

A

Miner’s Squib

61
Q

It’s shell is ignited by an electric current

A

Electric Squib

62
Q

Made by spinning yarn, hemp or jutearound a central core of black powder

A

Safety fuse

63
Q

Detonating fuse that contains PETN as explosive substance

A

Primacord

64
Q

Holes immediately below the perimeter holes at roof

A

Shoulder hole

65
Q

Holes adjaccent to permeter holes

A

Easer

66
Q
  • Blastholes ablong bottom of developed round
  • Use to create smooth floor
  • Contains explosives
A

Lifter

67
Q

Group of blastholes around one or more uncharged holes

A

Burn Cut

68
Q

Main explosive in a detonator

A

Base Charge

69
Q

Equivalent to detonation by detonatino velocity

A

Brisance

70
Q

Enlargening a hole using small explosive

A

Springing
Chambering
Bullying

71
Q

Perimeter hole fired after main charge

A

Cushion Blasting

72
Q

Explosive with large amt of oxidizers dissolved in water droplets surr by an immiscible fuel

A

Emulsion

73
Q

Cordlike fused with and external flame

Used to light a series of safety fuses

A

Ignitacord

74
Q

Used to hold down flying material

A

Mat

75
Q

Charge that det bef intended

A

Premature

76
Q

Small porous sphere of AN that can absorb fuel oil

A

6%

77
Q

Temporary explosive storage at blast size

A

Powder chest

78
Q

What are Reliever

A

Same as Easer

79
Q

Prevents accidental det of cap due to stray current

A

Shunt

80
Q

Hole drilled slightly downward from horizontal into floor

A

Snake hole

81
Q

Fired during main blasting but at a high delay

A

Smooth blasting

82
Q

Shokck from first charge detonates the succeeding rounds

A

Propagation Blasting

83
Q

Diff of Downline and Trunkline

A

Downline - cord down the hole

Trunkline - Connects grp of downlines

84
Q

What are Boosters

A

Known as Primer

Provide adequiate initiaino of charge

85
Q

Also known as blockholing

A

Pop blasting

86
Q

Also known as Mudcapping

A

Blistering/Plastering

87
Q

4 to 6 holes converging to a point

A

Pyramid cut

88
Q

4 to 6 holes converge an vert line

A

V cut

Wedge cut

89
Q

Like V cut but only at one side

A

Drag cut

90
Q

OSH TLV of CO2

A

5000 ppm

91
Q

Lower limit of Oxygen

A

20%

92
Q

TLV of CO

A

50ppm

93
Q

TLV of NO2

A

5 ppm

94
Q

TLV of NO

A

25 ppm

95
Q

TLV of SO2

A

5 ppm

96
Q

TLV H2S

A

10 ppm

97
Q

TLV NH3

A

50 ppm

98
Q

From distillation of coal

Mostly Methane

A

Fire Damp

99
Q

Mixture of CO2 and N2
From oxidation of coal
Name given to CO2 also

A

Black Damp

100
Q

Product of fires and smoke

CO2 and NH4

A

Choke damp

101
Q

Mixture of gasses after a fire

A

After damp

102
Q

Any mixture of CO2 and CH4

Can be flammable

A

Illawarra Bottom Gas

103
Q

Lethal conc of CO

A

White Damp

104
Q

High conc. of H2S

A

Stinkdamp

105
Q

Indicates spontaneous combustinon

Odor of Benzene

A

Fire Stink

106
Q

CO and H
Formed from extinquishing coal fire
Flammable

A

Water gas

107
Q

Explosive range of CH4

A

5-15 %

108
Q

Explosive range of CO

A

12.5-74%

109
Q

Explosive range of H2S

A

4-44 %

110
Q

Explosive range of H2

A

4-74 %

111
Q

Used to measure high velocity air

5-50 m/s

A

Pitot-static tube

112
Q

for Measuring low air velocites

0.05 m/s isg

A

Hot Wire Anenometer

113
Q

Shows air flow dist

for lower velocities

A

Smoke tube

114
Q

Most useful air vel meas. instrument

A

Vane Anemometer

115
Q

For very quick spot survey

A

Velometer

116
Q

Free air axial flow fan is

A

Not confined

117
Q

Tube axial flow fan is

A

Impeller is confined

118
Q

Vane Axial flow fan is

A

Tube axial with guide vanes

119
Q

Max # of blades for part fan

A

Solidity

120
Q

Higher the solidity, the…

A

Higher pressure

121
Q

Longer blades means

A

high airflow

122
Q

What is a volute

A

Section of fan casing where air flows after leaving impeller

123
Q

Other name for Regulators

A

System damper

124
Q

Same Q, additive pressure

A

Series fans

125
Q

Q is additive, pressure is the same

A

Parallel fans

126
Q

Used to reduce shock loss at fans

A

Fan Diffuser

127
Q

Best outlet to inlet ratio

A

4:1

128
Q

AQ Diam

A

27 mm

129
Q

BQ diam

A

36.5 mm

130
Q

NQ diam

A

47.6 mm

131
Q

NQ2 diam

A

50.5 mm

132
Q

NX diam

A

54.7 mm

133
Q

HQ diam

A

63.5 mm

134
Q

PQ diam

A

85 mm

135
Q

Fleet angle

A

1 - 1.5 deg

136
Q

Wire rope for 3200 ft and over

A

locked-out coil

137
Q

Coal mining support

Rock bolts spaced so their combined capacity is equal to deadweight of strata that may fall

A

Suspension

138
Q

Coal mining support

Bolting only planes of weaknesses

A

Keying effect

139
Q

Coal mining support

A

Rock bolts reinforce the rock that it becomes part of the support structure

140
Q

UG diam holes

A

1-4 in

141
Q

Surface Diam holes

A

6 - 18 in

142
Q

Explosives produce toxic fumes when

A

fuel shortage

143
Q

Stull stoping dip

A

45 to 50 deg

144
Q

TLV of H

A

4 %

145
Q

Grade of backfilled subsidence area for drainage

A

6%

146
Q

Extremely close spacing of discontinuities

A

60-200 mm

147
Q

Pit slope for gravel

A

30 - 37 degv

148
Q

CH4 TLV

A

1%

Mining (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions