Information Circular1950 - Mines and mineral resources |
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Page 10
... causes of unexplained fires that sometimes occur in such plants . Experiments to date have indicated that . the coke is exothermically active with oxygen , although the degree of activity . appears to vary considerably with different ...
... causes of unexplained fires that sometimes occur in such plants . Experiments to date have indicated that . the coke is exothermically active with oxygen , although the degree of activity . appears to vary considerably with different ...
Page 20
... causes of mine disasters or assign degrees of probability to possible causes , and also weigh the importance of contributory conditions that influence the extent , violenco , loss of life , and the eas & or difficulty of recovery ...
... causes of mine disasters or assign degrees of probability to possible causes , and also weigh the importance of contributory conditions that influence the extent , violenco , loss of life , and the eas & or difficulty of recovery ...
Page 25
... causes of surface - water infiltration , and the location and amounts of water accumulating in such mines that can be used to deter- mine the remedial measures that would offer the best opportunities for re- establishment of the ...
... causes of surface - water infiltration , and the location and amounts of water accumulating in such mines that can be used to deter- mine the remedial measures that would offer the best opportunities for re- establishment of the ...
Page 39
... caused about half the total fatalities in coal mines . Bureau of Mines engineers have studied roof - control measures whenever funds were available and have solved some special problems , such as that of " bumps . " However , no new ...
... caused about half the total fatalities in coal mines . Bureau of Mines engineers have studied roof - control measures whenever funds were available and have solved some special problems , such as that of " bumps . " However , no new ...
Page 39
... causes of accidents at the mine to be inspected ; this information to be used during the inspection to guide him in observing hazards and suggesting ways of eliminating them . b . Discussing observed hazards and means of correction with ...
... causes of accidents at the mine to be inspected ; this information to be used during the inspection to guide him in observing hazards and suggesting ways of eliminating them . b . Discussing observed hazards and means of correction with ...
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13 north 37 south anthracite anthracite mines bituminous coal bituminous-coal and lignite blasting blends Bureau of Mines carbon dioxide carbon monoxide cars catalyst cent mines cent circuit coal bed Coal Mine Inspection coal mines coal-mine inspectors coke concentrate conditions and practices cost County cut and fill D.C. Approval drilling dust allaying electric engineers equipment explosions feet Figure fill stoping fire area fiscal year 1949 fuel gas mask gasification Gunnison County haulage high-volatile Highland Surprise holes hydrogen inches installed investigation Joy Manufacturing June 30 lignite lignite mines loading machine main east entry mechanical method mill mineral mines cent mines Mines Information Circular motor operations oxygen Per-No percent Pine Creek Pittsburgh plant Pocahontas portal properties reports respirators rock dust roof support samples seals shaft SHOSHONE COUNTY shrinkage stoping steel surface surface magazine switch synthesis gas tests timber tons Total tunnel Type underground ventilation volts zinc