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Building Stoppings in Mines With Large Openings.
NTIS: PB 247 197 :10 pages
The Bureau of Mines conducted a state-of-the-art study of techniques currently employed to close large openings in underground mines. A large opening was considered to be any opening over 10 feet high and having a cross section of at least 200 square feet. Five salt mines and one limestone mine were visited to observe various methods of sealing large openings. Because of the variations in conditions from mine to mine, no definite conclusions could be drawn as to which is the best method. In mines where waste material is available, stoppings built by piling waste material are efficient and economical. Where waste material is not available, properly constructed brattice cloth stoppings are superior to those built from wood, concrete block, or urethane foams.
IH; Information Circular;
NTIS Accession No.
NTIS: PB 247 197
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division