Miners' Circular, Utgaver 53-61

Forside
U.S. Government Printing Office, 1945

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Innhold

Blasting warnings and signals
58
Blockholing and mudcapping Chute blasting
59
Firing large rounds
60
Longhole drilling and blasting Handling misfires
61
Gases from explosives
63
Liquid oxygen
65
Opencut blasting 57 58 59 59 61 63 65
66
Detonating fuse
69
Disposal of deteriorated explosives and detonators
70
Suggested rules for handling storing and delivering explosives General rules
72
Transporting explosives Unloading explosives from cars or trucks
73
Storing explosives
74
Suggested rules for explosives underground
75
Conclusions
76
Questions for class discussion
77
References on explosives
78
List of miners circulars
79
IIIIFFINNJOARABFPOJU 60
80
Purpose and scope
1
61
5
66
6
Haulage__
37
Dieselpowered equipment used in underground limestone mine
64
69
69
70
70
72
72
73
73
74
74
75
75
76
76
77
77
78
78
79
79
Doubleunit electric locomotive hauling ore from mine to mill
80
Safety belt used in dropping cars
86
Hoisting
100
ILLUSTRATIONS Fig Page
Frequency rates fatalities and injuries from explosives Under
1
taminants 1956__ 11
11
Improved hoisting installations___
24
Haulage equipment
31
Transportation__
38
ground and opencut metal mines 193143
43
5
46
Chutes
50
Truckbody safety block_
55
Questions on hoisting and haulage for class discussion_
58
Surface storage magazine brick construction
2
Selection of explosives__
14
Transportation of explosives detonators and fuse
33
Use of explosives and detonators__
41
Conveyor systemreceiving
59
8
Underground detonator magazine
3
15
5
Detailed sketch of small insulated explosives
9
43
10
Electric blasting parallel connections
15
45
18
TABLES
44
51
51
58
58
64
64
70
70
79
79
82
89
UNITED STATES OF AMERICA
v
Barricaded explosives magazines concrete and sandfilled construc tions
4
Barricaded explosives magazines cinderblock construction
5
Barricaded explosives magazine steel construction
6
Insulated car for transporting explosives into mine
7
Detailed sketch of large insulated explosives
8
Steel rubberlined explosives
10
Gases in metal and nonmetallic mines_
18
Mine ventilation__
83
84
84
90
90
Methane ignitions
113
Suggested readingfires gases and ventilation_
119
Injuries from hoisting at underground metal and nonmetallic mines
1
Mine truck for bringing explosives to a level magazine
11
Shelter hole in concreted haulage drift_
17
49
33
79
38
Injuries from haulage at opencut metal and nonmetallic mines 193251
51
84
70
Purpose and scope
1
Injuries from haulage at underground metal and nonmetallic mines
2
Bare wires and cables
10
Grounding electrical installations__
16
46
78
86
86
93
93
Fig Page
97
101
101
TABLES
Introduction_
1
Clips required for 6 by 19 plowsteel rope_
5
Plastic container for carrying electric detonators
12
Fusecapping room
13
Electric blasting series connections
14
Electric blasting seriesinparallel connection
16
20
20
Diesel locomotive in leadzinc mine
24
17
25
26
26
27
27
31
28
32
32
36
36
Supervision education and discipline
50
UNITED STATES OF AMERICA
Injuries from electricity at opencut metal and nonmetallic mines
3
Haulage injuries in 25 opencut mines in the Lake Superior district
6
Constituents of mine rocks_ 14
14
Electric blasting parallelinseries connection
17
Electric blasting connecting leg wires to two bus wires
18
41
27
Miscellaneous hazards_
32
Accidents caused by flooding metal and nonmetallic mines 42
42
Recommended minimum standards of illumination for some industrial
58
Preface_
1
Dynamites___
10
Airdox
16
Electric blasting removing short circuit from terminals of lead wires when connecting to firing circuit
19
Blowing out holes with compressed
26
Loading holes in drift face
27
Blasting a round in an open
29
Steel shelter for men when blasting in an open
30
Purchase and inspection of explosives_
37
Electric blasting connecting lead wire plug into the firing circuit 43
43
18
75
Preface__
1
Permissible explosives and blasting devices
11
Airdox
19
Electric blasting miner closing the switch of the stope circuit connect it to the main blasting circuit
21
How explosives are fired
25
Other blasting accessories
35
Purchasing and inspecting explosives_
41
Tools for opening explosives boxes
57
and 40 Insulated explosives cars
81
Electric blasting miners removing their checks from section board as they leave area
22
Electric blasting after seeing that all men are out foreman closes firing switch on main circuit
23
Preparing primers and loading holes
24
Methods of preparing primers in electric blasting
25
Starting fan after blasting to clear smoke and gases from working
28
place
37
Details of an insulated explosives car and coupling
41
44
44
45
45
46
46
50
49
51
51
55
55
56
56
62
62
67
67
68
68
82 100A + A ++ 1000000
82
38
87
Preface
1
108
4
Injuries from machinery at underground metal and nonmetallic mines
5
Location and type of motor control
9
114
99
Injuries from falls of persons at opencut metal and nonmetallic mines
10
Welding
16
Supply houses_
22
Surfaceunderground protection__
32
Methods of priming cartridges
46
Preface__
Surfaceunderground protection_
29
Hand and finger protection_
44
A Tamping charge with clay without using paper the preferred
47
Plugging abandoned wells__
58
116
83
Locking selfdumping cages upright
37
Speed of hoisting
43
Conclusions
49

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