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Review of single-entry longwall mining technology in the United States.
MISSING, 1990; :1-18
Longwall mining systems are used to mine approximately 50 pct of the world's total underground coal production. Single entries are the predominant method of longwall development in Europe and Asia, where mining conditions are more severe than those encountered in the United States. During the 1970's and early 1980's, the U.S. Bureau of Mines and the U.S. mining industry invested nearly $20 million in single-entry and related research. This report reviews the accomplishments of single-entry research in the United States and describes two U.S. single-entry field projects: the Sunnyside single-entry project in central Utah and the tunnel-boring project in northern West Virginia. Also discussed are a single-entry study conducted by North American Mining Consultants (NAMCO) and a single-entry design study conducted by Ketron, Inc. This Bureau report compares the resulting technology with European counterparts to further assess the utility and efficiency of U.S. systems.
Mining; Longwall mining; Underground mines; Underground mining; Coal mines; Coal mining; Mining industry; Mine safety; Safety research; Industrial design; Environmental technology
IH; Information Circular
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division