 | Montana - 1949 - 804 pages
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 | 1939 - 1246 pages
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 | 1939 - 1242 pages
...split shall conform to the requirements of the law of the State in which the mine is situated. (3) The quantity of air reaching the last open crosscut in any pair or set of entries shall not be less than 6,000 cubic feet a minute. However, the quantity of air reaching the last open... | |
 | United States - 1983 - 1156 pages
...flammable, explosive, noxious, and harmful gases, and dust, and smoke and explosive fumes. The minimum quantity of air reaching the last open crosscut in any pair or set of developing entries and the last open crosscut in any pair or set of rooms shall be nine thousand cubic... | |
 | 1947 - 196 pages
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 | United States. Congress. House. Committee on Education and Labor - 1947 - 222 pages
...more than 100 in order to conform to the requirements of the Illinois State mining law. Section 3c : The quantity of air reaching the last open crosscut in any pair or set of entries should not be less than 6,000 cubic feet a minute. Section 6f: Stoppings in crosscuts, between intake... | |
 | 1967 - 414 pages
...the quantity of air reaching the last open crosscut in any pair or set of entries shall not be lees than six thousand cubic feet a minute, except that...minute if not less than six thousand cubic feet of all a minute is being delivered to the Intake end of the pillar line. In anthracite mines the quantity... | |
 | 1971 - 654 pages
...quantity of air reaching the last open crosscut in any pair or set of entries shall not be less than 6,000 cubic feet a minute, except that the quantity of air...set of entries in pillar sections may be less than 6,000 cubic feet a minute if not less than 6,000 cubic feet of air a minute Is being delivered to the... | |
 | 1965 - 438 pages
...render harmless, and to carry away, flammable or harmful gases. In bituminous-coal and lignite mines the quantity of air reaching the last open crosscut in any pair or set of entries shall not be less than six thousand cubic feet a minute, except that the quantity of air reaching the... | |
 | United States. Congress. Senate. Committee on Labor and Public Welfare - 1949 - 332 pages
...a split shall conform to the requirements of the law of the State in which the mine is situated. c. The quantity of air reaching the last open crosscut in any pair or set of entries shall not be less tlian 6,000 cubic feet a minute. However, the quantity of air reaching the last open... | |
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In bituminous-coal and lignite mines the quantity of air reaching the last open crosscut in any pair or set of entries shall not be less than six thousand cubic feet a minute, except that the quantity of air reaching the last open crosscut In any pair... 
