Mechanization, employment, and output per man in bituminous-coal mining, Volume 1

Front Cover
Work Projects Administration, National Research Project in cooperation with Dept. of the Interior, Bureau of Mines, 1939 - Bituminous coal - 436 pages
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Contents

INTRODUCTION
1
Appendix
4
MINING UNDERGROUND AND COAL PREPARATION PAST
8
Table
11
Cutting machines
16
Distribution of scrapers installed in underground
18
Drilling and blasting
20
Coal produced in underground bituminous mines
22
Total underground production in eastern Kentucky
174
BASES FOR ANALYZING PERFORMANCE OP MECHANICAL
176
Number of commercial bituminouscoal mines
179
Percentage of total bituminouscoal production
182
Source and character of data
188
Classification of mines
203
B26 Number production and tonnage mechanically loaded
204
B45 Comparison of number production and tonnage
205

Mine locomotives
27
Mechanization of auxiliary services
29
B6 Mechanically cleaned bituminous coal by State
32
B42 Growth of mechanical loading in Washington
34
Modern bituminouscoal preparation plants
35
Indexes of output per manday and per manhour
38
Technology in burning coal
42
Coal resources
48
B43 Salient statistics showing performance of Group
50
Average British Thermal Units per pound of coal
53
Interrelation of resources technology
54
Average depth of cover of underground bituminous
60
Chapter Page
72
Percentage distribution of bituminous coal mined
75
Distribution of number and production of commercial
76
B25 Salient statistics showing performance of Group
81
A RESULT OP SPECIAL RESOURCE
87
Airplane view of a strip mine
88
Labor requirements of a large strip mine with
94
Net tons per man per day at all bituminouscoal
102
Summary of bituminous stripping operations at mines
106
HISTORY DESCRIPTION AND PRESENT DISTRIBUTION
114
Scraper loaders
117
Pitcar loaders
121
Distribution of handloaded conveyors Installed
128
Number of mines using handloaded face conveyors
130
Tractormounted gatheringtype mobile loader
134
Number of mobile loaders in use by State 1930
138
Underground bituminouscoal production mechanically
141
INFLUENCE OP RESOURCE CONDITIONS ON MECHANICAL
143
Bituminouscoal production seam thickness method
148
Illinois county distribution of tonnage mined
149
Chapter Page
164
Pennsylvania county distribution of tonnage mined
165
Bituminouscoal production tonnage mechanically
166
Distribution of bituminous coal loaded mechanically
210
Comparative significance of area data
212
Comparative performance in Illinois of underground
218
B29 Tons mechanically loaded and number of men required
232
Tonnage mechanically loaded and unit labor
236
Indiana
239
Chapter Page
243
Tonnage mechanically loaded and unit labor
246
B30 Indexes of production manhours and unit labor
249
PERFORMANCE OP MECHANICAL AND HANDLOADING MINES
253
Comparative performance in Wyoming of underground
254
Comparative performance in Montana of underground
265
Washington
270
Utah
276
Comparative performance in Utah of underground mines
278
Chapter Page
282
Comparative performance in central Pennsylvania
288
Western Pennsylvania and Ohio No 8 field
294
Total underground production in Ohio and percentage
299
West Virginia
300
SUMMARY AND CONCLUSIONS
312
Labor output and labor requirements in selected
321
B50 Growth of mechanical loading in central
332
Bl Production employment and labor output In
334
B3 Salient statistics on machine cutting of bituminous
360
B10 Percent of bituminouscoal production mined
370
B19 Indexes of output per manday and per manhour
378
B37 Comparison of number production and tonnage
400
B22 Comparison of number production and tonnage
402
B51 Salient statistics showing performance of Group
416
B39 Salient statistics showing performance of Group
417
B56 Salient statistics showing performance of Group
425
B23 Growth of mechanical loading in Illinois by types
xiii
B40 Number production and tonnage mechanically loaded
301

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