 (b) Charges exceeding one and one-half pounds, but not exceeding three pounds, shall be used only if boreholes are 6 feet or more in depth, and explosives are charged in a continuous train, with no cartridges deliberately deformed or crushed, with all...  Miners' Circular - Page 151947Full view - About this book
 | Administrative law - 1939 - 1242 pages
...exceeding 3 pounds, shall be used only if boreholes are 6 feet or more in depth, and explosives are charged in a continuous train, with no cartridges...each other, and with the end cartridges touching the back of the hole and the stemming respectively, and Class A or Class B permissible explosives are used.... | |
 | Mineral industries - 1949 - 584 pages
...other restrictions: 1. Shot holes must be 6 feet or greater in depth. 2. Explosive must be cliarged in a continuous train with no cartridges deliberately...rear of the hole and the stemming, respectively. 3. Minimum burden must be 18 inches. h. Stemming must occupy a minimum of -2 feet of the shot hole. 5.... | |
 | United States. Congress. House. Committee on Education and Labor - 1949 - 564 pages
...exceeding 3 pounds, shall be used only If boreholes are 6 feet or more In depth, and explosives are charged in a continuous train, with no cartridges...each other, and with the end cartridges touching the back of hole and the stemming, respectively, and class A or class B permissible explosives are used.... | |
 | United States. Congress. Senate. Committee on Labor and Public Welfare - 1949 - 332 pages
...exceeding 3 pounds, shall be used only if boreholes are 6 feet or more in depth, and explosives are charged in a continuous train, with no cartridges...each other, and with the end cartridges touching the back of the hole and the stemming, respectively, and class A or class B permissible explosives are... | |
 | Administrative law - 1978 - 998 pages
...exceeding 3 pounds, shall be used only if boreholes are 6 feet or more in depth, the explosives are charged in a continuous train, with no cartridges...cartridges in contact with each other and with the end cartridge touching the back of the hole and the stemming respectively, and Class A or Class В permissible... | |
 | Administrative law - 1977 - 928 pages
...depth, the explosives are charged in a continuous train with no cartridges deliberately deformed 01 crushed, with all cartridges in contact with each other and with the end cartridge touching the back of the hole and the stemming respectively, and Class A or Class B permissible... | |
 | Mineral industries - 1950 - 1330 pages
...subject to the following restrictions: 1. Shot holes must be 6 feet or more in depth. 2. Explosivo must be charged in a continuous train, with no cartridges...rear of the hole and the stemming, respectively. 3. Minimum burden must bo 18 inches. 3599 - 63 k . Stemming must occupy a minimum of 2 feet of the shot... | |
 | United States. Congress. Senate. Committee on Labor and Public Welfare - 1952 - 1460 pages
...exceeding 3 pounds, shall be used only if boreholes are 6 feet or more in depth, and explosives are charged in a continuous train, with no cartridges...each other, and with the end cartridges touching the back of the hole and the stemming, respectively, and class A or class B permissible explosives are... | |
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