From Introduction: "Data collected by the Bureau of Mines indicate the United States a large percentage of the blasting in quarries, shafts, and tunnels, and from 15 to 25 percent of the blasts in mining operations, are set off electrically. The Bureau of Mines is interested in electric shot-firing because of its use in mining, and especially because electric methods, when properly applied, are undoubtedly safer than other methods commonly used.
From Introduction: "Some results of the work already done are presented in this bulletin, which give...
Report issued by the U.S. Bureau of Mines on the improvements made on permissible electric mine lamp...
F19628-95-C-0100, sponsored by DOE We have recently begun a project to document the numbers of mine ...
From Introduction: "The purpose of the investigation discussed in this bulletin, one of a series dea...
From Introduction: "As part of the investigations of the cause of mine accidents and of the safest a...
From Introduction: "This report shows the results obtained and conclusions drawn from observing the ...
Report issued by the Bureau of Mines over rock quarries in the United States. As stated in the intro...
From Introduction: "This paper gives a brief account of the introduction of electric lighting in min...
Report issued by the U.S. Bureau of Mines discussing the electric smelting of nonferrous ores. As st...
From Introduction: "This paper gives the results of sampling the gases from blasting drift rounds at...
"Publications on mine accidents and methods of coal mining": p. 34-36.1st edition, Sept. 1915.At hea...
Report issued by the Bureau of Mines over the design of safe electrical accessories for use in minin...
From Introduction: "The investigation described in this bulletin was undertaken by the Bureau of Min...
From Introduction: "This bulletin, which is arranged in three parts, treats of the causes and preven...
Report issued by the Bureau of Mines over studies conducted on geophysical surveys for exploratory d...
From Introduction: "Some results of the work already done are presented in this bulletin, which give...
Report issued by the U.S. Bureau of Mines on the improvements made on permissible electric mine lamp...
F19628-95-C-0100, sponsored by DOE We have recently begun a project to document the numbers of mine ...
From Introduction: "The purpose of the investigation discussed in this bulletin, one of a series dea...
From Introduction: "As part of the investigations of the cause of mine accidents and of the safest a...
From Introduction: "This report shows the results obtained and conclusions drawn from observing the ...
Report issued by the Bureau of Mines over rock quarries in the United States. As stated in the intro...
From Introduction: "This paper gives a brief account of the introduction of electric lighting in min...
Report issued by the U.S. Bureau of Mines discussing the electric smelting of nonferrous ores. As st...
From Introduction: "This paper gives the results of sampling the gases from blasting drift rounds at...
"Publications on mine accidents and methods of coal mining": p. 34-36.1st edition, Sept. 1915.At hea...
Report issued by the Bureau of Mines over the design of safe electrical accessories for use in minin...
From Introduction: "The investigation described in this bulletin was undertaken by the Bureau of Min...
From Introduction: "This bulletin, which is arranged in three parts, treats of the causes and preven...
Report issued by the Bureau of Mines over studies conducted on geophysical surveys for exploratory d...
From Introduction: "Some results of the work already done are presented in this bulletin, which give...
Report issued by the U.S. Bureau of Mines on the improvements made on permissible electric mine lamp...
F19628-95-C-0100, sponsored by DOE We have recently begun a project to document the numbers of mine ...