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New type of boring machines lead to high-speed coal mine development.
Coal Age 1975 Jul; 80(8):106-111
In coal mine development, large numbers of entries have to be driven and shafts sunk to meet ventilation requirements and provide access for men and materials. Conventional methods of shaft and entry development are slow, inefficient, dangerous, and as a consequence, expensive. The Bureau of Mines has embarked on a high-speed coal mine development program with three specific goals: (1) to reduce entry development time by 50 pct with a corresponding cost reduction of 25 pct, (2) to reduce mine shaft construction time by a factor of four with direct cost savings of 15 pct, and (3) to encourage the coal industry to use the technology developed under the program.
Mining-industry; Underground-mining; Mine-shafts
OP; Journal Article
Issue of Publication
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division