Miners' Circular, Utgaver 53-61U.S. Government Printing Office, 1945 |
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Side 7
... accidents have occurred so frequently that there is serious doubt as to the safety of preparing primers in the close vicinity of other explosives ... ACCIDENTS 7 1- Explosive accidents reported to National Safety Competition, 1925-35.
... accidents have occurred so frequently that there is serious doubt as to the safety of preparing primers in the close vicinity of other explosives ... ACCIDENTS 7 1- Explosive accidents reported to National Safety Competition, 1925-35.
Side 8
... ACCIDENTS FROM EXPLOSIVES Flying material from blast. Type of operation Underground mines ... Open - cut mines and quarries .. Construction and miscellaneous . Total . Under ... ACCIDENTS IN METAL MINES Selected explosives accidents, 1940-44.
... ACCIDENTS FROM EXPLOSIVES Flying material from blast. Type of operation Underground mines ... Open - cut mines and quarries .. Construction and miscellaneous . Total . Under ... ACCIDENTS IN METAL MINES Selected explosives accidents, 1940-44.
Side 9
... Several fatal accident occurs so suddenly they cannot tell what happened , or they leg wires of electric detonators to charged circuits or by COMMON CAUSES OF EXPLOSIVES ACCIDENTS 9 Underlying causes of accidents from explosives.
... Several fatal accident occurs so suddenly they cannot tell what happened , or they leg wires of electric detonators to charged circuits or by COMMON CAUSES OF EXPLOSIVES ACCIDENTS 9 Underlying causes of accidents from explosives.
Side 10
... accidents at underground mines listed in table 5 resulted in 46 fatalities , while the 36 at open - cut mines and quarries caused 72 deaths ... ACCIDENTS IN METAL MINES Accidents to children from blasting caps Selection of explosives.
... accidents at underground mines listed in table 5 resulted in 46 fatalities , while the 36 at open - cut mines and quarries caused 72 deaths ... ACCIDENTS IN METAL MINES Accidents to children from blasting caps Selection of explosives.
Side 32
... accidents from this source year after year , with many accidents from the same clearly unsafe practices . The unsafe acts responsible for most explosives accidents are com- mitted either through lack of knowledge of the dangers involved ...
... accidents from this source year after year , with many accidents from the same clearly unsafe practices . The unsafe acts responsible for most explosives accidents are com- mitted either through lack of knowledge of the dangers involved ...
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ampere belt blasting caps Bureau of Mines burning cable cage carbide lamp carbon dioxide carbon monoxide cars cartridge cause charge chute Circ circuit circuit breaker conductors connected crew danger devices doors drift drill dust dynamite electric blasting caps explosives accidents extinguishers fatal feet figs FIGURE fire footcandles fuse gases ground guarded handling hazards holes hydrogen sulfide ignition inches installed insulated Lake Superior Lake Superior District lamp lead wires light loading locomotives magazine material mechanical metal and nonmetallic Metal Mines Metal-Mine methane method Miners Mines Inf nitroglycerin nonfatal injuries nonmetal nonmetallic mines operations oxygen oxygen breathing apparatus percent practices prevent Primacord primer protection rails rock rope safe safety shaft shovel signal skip smoke station stope storage sulfide sulfur dioxide surface surface magazines switch temperature timber tion track trolley wire truck underground mines ventilation voltage
Populære avsnitt
Side 85 - ... when tested at a point not less than 12 inches from the roof, face, or rib. (h) "Letter of certification...
Side 81 - ... d. The handling of a misfired shot shall be under the direct supervision of the mine manager or mine foreman or a competent person designated by him. SEC. 9. Cardox. — a. The provisions governing the handling, storage, and transportation of explosives shall apply to the heater elements of Cardox blasting devices prior to their installation in the shells.
Side 9 - That it shall be the province and duty of said bureau and its director, under the direction of the Secretary of the Interior, to make diligent investigation of the methods of mining, especially in relation to the safety of miners and the appliances best adapted to prevent accidents, the possible improvement of conditions under which mining operations are carried on, the treatment of ores and other mineral substances...
Side 55 - Switches and circuit breakers shall be installed so that they are readily accessible and can be operated without danger of contact with moving or live parts.
Side 9 - Interior, to make diligent investigations of the methods of mining, especially in relation to the safety of miners, and the appliances best adapted to prevent accidents, the possible improvement of conditions under which mining operations are carried on, the treatment of ores and other mineral substances, the use of explosives and electricity, the prevention of accidents, and other inquiries and technologic investigations pertinent to said industries...
Side 9 - ... said industries, and from time to time make such public reports of the work, investigations, and information obtained as the Secretary of said department may direct with the recommendations of such bureau. The first annual report of the Director of the Bureau of Mines, issued in 1911, states: The Bureau of Mines was established by an act of Congress (36 Stat., 369) approved May 16, 1910, and effective July 1, 1910. The demand for special recognition and aid from the Federal Government for the...
Side 13 - This table applies only to the manufacture and permanent storage of commercial explosives. It is not applicable to transportation of explosives, or any handling or temporary storage necessary or incident thereto. It is not intended to apply to bombs, projectiles, or other heavily encased explosives.
Side 109 - V2 miles per hour, and potential shall be applied to the cable during tests. The cable will be shifted after each passage of the car, thus giving 100 places in the cable over which two wheels have passed. If the cable fails by short-circuiting or grounding to the rails or wheels at 11 or more places, it will not be listed by the Bureau.
Side 91 - ... square inch. 2. Air lines shall be grounded at the compressor and, if possible, at other lowresistance ground connections along the lines, such as at borehole casings. They shall not be connected in any way to tracks, water lines, or other electric power return conductors and shall be suitably insulated where they cross electric wires or underneath the track. 3.