A Summary of Data from the Sunnyside Single Entry Study - 1971-80.
Bowers ET; Henton LN
For Reference Only At Bureau Libraries :541 pages
The sunnyside single-entry project pioneered the use of single entries for longwall development in this country. During the 10- year course of the project, an immense amount of information was gathered. Over 3 miles of entries were observed primarily through insrument groupings placed in strategically located areas or "rooms." Nearly 1,200 instruments were monitored to gain information on the behavior of coal entries during development stages and through the mining of two longwall panels. This was one of the most extensively documented projects undertaken by the Bureau of Mines. The data gathered has a great potential for scientific research, especially in the area of longwall mining. This report presents the ground control data gathered, in the form of computerized plots. Roof-to-floor deformation and load on cribs and roof bolts make up the bulk of the data, which is presented as load or deformation versus time.
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