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The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

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Review of Strategies to Manage Cutter Roof Failure in Coal Mines.

PB94183118

Publication Date	1994
Personal Author	Wuest, W. J.
Page Count	50
Abstract	This U.S. Bureau of Mines report presents an overview of ground control considerations associated with cutter roof failure. Many of the relevant U.S. and international research studies since the late 1940s are reviewed, and summaries of recent design guides are included. Factors affecting cutter roof, such as underground stress field and rock structure around the entry, are described. Strata control techniques are also outlined. These techniques are divided into three sections: artificial support, mine structure design, and multiple-seam extraction. Other subjects covered in the report include monitoring and prediction, effect of geologic features, and mapping of adverse mining conditions. The emphasis of this report is on practical considerations; theoretical discussions are minimal.
Keywords	Coal mines Rock mechanics Ground motion Underground mining Columns(Supports) Roofs Stress analysis Mining engineering Failure Structural analysis Cutter roof failure
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 50D - Soil & Rock Mechanics
Corporate Authors	Bureau of Mines, Denver, CO. Denver Research Center.
Supplemental Notes	See also PB87-116976. Library of Congress catalog card no. 93-28662.
Document Type	Technical Report
Title Note	Information circular/1994.
NTIS Issue Number	199418

Review of Strategies to Manage Cutter Roof Failure in Coal Mines.

Review of Strategies to Manage Cutter Roof Failure in Coal Mines.
PB94183118

Publication Date	1994
Personal Author	Wuest, W. J.
Page Count	50
Abstract	This U.S. Bureau of Mines report presents an overview of ground control considerations associated with cutter roof failure. Many of the relevant U.S. and international research studies since the late 1940s are reviewed, and summaries of recent design guides are included. Factors affecting cutter roof, such as underground stress field and rock structure around the entry, are described. Strata control techniques are also outlined. These techniques are divided into three sections: artificial support, mine structure design, and multiple-seam extraction. Other subjects covered in the report include monitoring and prediction, effect of geologic features, and mapping of adverse mining conditions. The emphasis of this report is on practical considerations; theoretical discussions are minimal.
Keywords	Coal mines Rock mechanics Ground motion Underground mining Columns(Supports) Roofs Stress analysis Mining engineering Failure Structural analysis Cutter roof failure
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 50D - Soil & Rock Mechanics
Corporate Authors	Bureau of Mines, Denver, CO. Denver Research Center.
Supplemental Notes	See also PB87-116976. Library of Congress catalog card no. 93-28662.
Document Type	Technical Report
Title Note	Information circular/1994.
NTIS Issue Number	199418